-
Some ribosomes attach to the?
a)SER
b)mitochondria
c)RER
d)Golgi body
e)DNA
RER
-
There was a stupid competition sponsored by certain radio station where people were told to drink water as much as they could during a limited period of time and whoever drank the most water would be the winner. This woman drank about a gallon of water in a record time. She won the competition and died afterwards, because water intoxication due to:
a)water moved from her blood to the intestines; she dehydrated
b)the osmosis from the hypertonic solution to the hypotonic one
c)osmosis from the hypotonic solution to the hypertonic one
d)the isotonic solution of the water caused the hypertonic solution of her blood to become hypertonic, too
e)unexplainable causes, because water is not poisonous
osmosis from the hypotonic solution to the hypertonic one
-
Toxic substances are removed from cells by the:
a)Golgi body
b)mitochondria
c)ribosomes
d)SER
e)RER
SER
-
The cell’s DNA is located in the:
a)nucleus
b)nucleolus
c)lysosome
d)ribosome
e)nuclear membrane
nucleus
-
Chromosomes are mostly made of:
a)DNA and RNA
b)proteins and RNA
c)lipids and proteins
d)proteins and DNA
e)carbohydrates, lipids, proteins and DNA
proteins and DNA
-
Your cell membranes (as well as all cell membranes) are:
a)impermeable
b)freely permeable
c)actively permeable
d)selectively permeable
e)slightly permeable
selectively permeable
-
A solution that contains a lower concentration of a solute than the cytoplasm of a cell is called:
a)isotonic
b)hypertonic
c)hypotonic
d)isomeric
e)isotropic
hypotonic
-
FB (Fill in the Blank). If a substance moves against its concentration gradient it means that it moves from ____ concentration to ____ concentration.
Low concentration to high concentration
-
A red blood cell placed in pure water would:
a)shrink
b)swell initially, then shrink as equilibrium is reached
c)neither shrink nor swell
d)swell and burst
swell and burst
-
The plasma membrane is:
a)a single-layered membrane around the nucleus
b)a double layer of proteins around the plasma
c)the phospholipid bilayer surrounding the cell
d)a membrane made of cristae
The phospholipid bilayer surrounding the cell
-
Structures that are fingerlike projections that increase the absorbing surface of cells:
a)sterocilia
b)microvilli
c)cilia
d)flagella
microvilli
-
If a cell is placed in a hypertonic solution containing a solute to which the membrane is impermeable, the cell will:
a)swell and burst
b)lose water and shrink
c)shrink at first, but later will reach homeostasis
d)show no change due to diffusion of solvent and solute
lose water and shrink
-
Fluid intercellular material:
a)cytosol
b)cytoplasm
c)protoplasm
d)nucleoplasm
Cytosol
-
Once solid material is phagocytized and taken into a vacuole, one of the following happens:
a)A ribosome enter the vacuole and uses the amino acids of the invader.
b)A lysosome combines with the vacuole and digests the material.
c)The vacuole remains untouched.
d)Nitrogen molecules enter the vacuole to digest the material.
A lysosome combines with the vacuole and digests the material.
-
One of the following is the function of a plasma membrane protein:
a)to circulate antibodies
b)molecular transport through the membrane
c)to form a lipid bilayer
d)oxygen transport
Molecular transport through the membrane
-
To detoxify substances by enzymatic action:
a)ribosomes
b)lysosomes
c)flagella
d)peroxisomes
Peroxisomes
-
Remember DNA duplication? The name of the phase where it happens is:
a)Interphase
b)Telophase
c)Anaphase
d)Prophase
e)Metaphase
Interphase
-
The basic structural and functional unit of life:
a)the atom
b)the molecule
c)the cell
d)the tissue
e)the virus
the cell
-
The main component of the cytosol is:
a)proteins
b)sugars
c)salts
d)water
water
-
The function of the centrioles is:
a)to organize the spindle fibers
b)to provide motion to substances along the cytoplasm
c)to serve as the site for ribosomes production
d)to produce ATP
To organize the spindle fibers
-
Crenation is likely to occur in blood cells in:
a)an isotonic solution
b)an hypertonic solution
c)an hypotonic solution
d)the plasma
An hypertonic solution
-
Rod-shaped bodies that contain the genes: ____________________
Chromosomes
-
The cell membrane is made of:
a)a bilayer of proteins with some phospholipids embedded in it
b)a bilayer of phopholipids with some proteins embedded in it
c)a bilayer of phospholipids and a bilayer of proteins
d)DNA and RNA
e)a bilayer of carbohydrates, lipids and proteins
A bilayer of phopholipids with some proteins embedded in it
-
You are lost and starving in a desert. In order for your brain to obtain enough energy to stay alive, it begins to digest some of its own less essential components. The organelle responsible for this self-digestion is the ________________________________.
Lysosomes
-
The more active a cell is, the more ___________________ it contains.
Mitochondria
-
Lysosomes are made by the:
a)ribosomes
b)nucleolus
c)Golgi apparatus
d)smooth endoplasmic reticulum
e)flagella
Golgi apparatus
-
The ________________________ (which are present in animal cells but not in plant cells) are made of tubulin
Centrioles
-
The arrangement of microtubules in a centriole is:
a)9 triplets in a circle
b)10 triplets in a circle
c)9 triplets in circle and a pair in the center
d)9 pairs in a circle and a pair in the center
9 triplets in a circle
-
They have the same arrangement for the microtubules:
a)pseudopods and centrioles
b)centrioles and cilia
c)cilia and flagella
d)pseudopods, cilia and flagella
cilia and flagella
-
The modification of proteins occurs in the _____________.
RER
-
The ribosomes are produced by the________________.
Nucleolus
-
The _______________ controls the cell activities.
Nucleus
-
It produces lipids:
a)Golgi apparatus
b)smooth endoplasmic reticulum
c)rough endoplasmic reticulum
d)nucleus
Smooth endoplasmic reticulum
-
They contain digestive enzymes:
a)nucleolus
b)Golgi apparatus
c)lysosomes
d)centrioles
lysosomes
-
The ___ proteins are deeply embedded in the bilayer of ___:
a)peripheral; integral proteins
b)integral; peripheral proteins
c)peripheral; phospholipids
d)integral; phospholipids
integral; phospholipids
-
They are made of the proteins actin and myosin:
a)centrioles
b)microtubules
c)microfilaments
d)cilia and flagella
microfilaments
-
The movement of oxygen molecules from high to low concentration of them across a cell membrane:
a)simple diffusion
b)active transport
c)facilitated transport
d)osmosis
simple diffusion
-
Water entering a red blood cell placed in distilled water is an example of ___________________.
Osmosis
-
Pumping of molecules out of a cell from low to high concentration with the help of a carrier is named ______________.
Active Transport
-
Exocytosis of wastes (byproducts) is called ____________.
Excretion
-
When an amoeba encloses a bacterium in a vesicle:
a)endocytosis
b)phagocytosis
c)pinocytosis
d)receptor-mediated endocytosis
e)exocytosis
phagocytosis
-
Process that involves the participation of receptors and the production of vesicles to input materials in the cell:
a)receptor-mediated exocytosis
b)receptor-mediated phagocytosis
c)receptor-mediated endocytosis
d)pinocytosis-carrier-endocytosis
receptor-mediated endocytosis
-
An enzyme destroys the actin molecules of a cell. As a consequence, the cell:
a)will not be able to move
b)won’t be able to do protein synthesis
c)will reproduce mitotically
d)will lose its microtubules
will not be able to move
-
They are very scarce when present:
a)microtubules
b)microfilaments
c)cilia
d)flagella
flagella
-
They are hydrophobic:
a)the heads of the phospholipids
b)the tails of the phospholipids
c)the glycerol and phosphate of the phospholipids
d)b and c
the tails of the phospholipids
-
It requires ATPs:
a)simple diffusion
b)facilitated transport
c)active transport
d)osmosis
active transport
-
Two phases where chromatin fibers (not chromosomes) are present: _______________
Interphase & Telophase
-
The chromosomic units attached to each other are named:
a)chromatin fibers
b)sister chromosomes
c)sister chromatids
d)sister centromeres
e)brother chromosomes
sister chromatids
-
The region of attachment between chromosomic units is named ___________________.
Centromere
-
One of the following is a diploid cell:
a)n = 5
b)n = 6
c)2n = 7
d)2n = 8
e)c and d are correct
c and d are correct
-
Chromosomes are on their way towards the equator during _________________.
Prophase
-
The sequence of phases in mitosis is:
a)telo-, ana-, meta-, prophase
b)pro-, ana-, meta-, interphase
c)inter-, pro-, meta-, ana-, telophase
d)pro-, meta-, ana-, telophase
pro-, meta-, ana-, telophase
-
Duplication of chromatin fibers and DNA occurs specifically in:
a)subphase G1
b)subphase G2
c)subphase S
d)interphase
e)telophase
subphase S
-
The nuclear membrane appears during ______________________.
Telophase
-
A haploid cell of 5 chromosomes is in prophase. The cell, then, has:
a)5 chromatids
b)10 chromatids
c)5 single chromosomes
d)10 chromatin fibers
10 chromatids
-
A 2n = 28 cell in prophase has:
a)28 single chromosomes
b)28 chromatids
c)14 pairs of double chromosomes
d)14 pairs of chromatids
14 pairs of double chromosomes
-
The duplication of centrioles ends specifically in:
a)subphase G1
b)subphase G2
c)subphase S
d)interphase
e)telophase
subphase G2
-
When you were an embryo, your brain cells reproduced by:
a)mitotic division
b)meiotic division
c)a combination of mitosis and meiosis
d)sexual reproduction
e)anaerobic respiration
mitotic division
-
The production of your gametes is by:
a)meiotic division
b)mitotic division
c)a combination of mitosis and meiosis
d)cytokinesis, mitosis and meiosis
meiotic division
-
One difference between mitotic division and meiotic division is that in mitotic division ___ and in meiotic division ___:
a)the daughter cells contain half the number of chromosomes; the daughter cells contain the same number of chromosomes than the parental cell
b)there are two daughter cell produced; there are four daughter cells produced
c)there are four daughter cells produced; there are two daughter cells produced
d)the process stops; the process repeats with the daughter cells
there are two daughter cell produced; there are four daughter cells produced
-
Each set of ___ in DNA or in mRNA is known as a ___:
a)amino acids; codon
b)nitrogenous bases; anticodon
c)nucleotides; polypeptide
d)nucleotides; codon
nucleotides; codon
-
The cytokinesis in animal cells involves a ___________________.
Cytoplasmic Furrow
-
The synthesis of mRNA by a strand of DNA is named ________________.
Transcription
-
It provides energy to activate the amino acids:
a)ribosome
b)ATP
c)DNA
d)mRNA
e)tRNA
ATP
-
The spliceosome cuts out the _________________ and reattaches the ____________________.
Introns / Exons
-
It takes place in the cytoplasm:
a)transcription
b)initiation
c)elongation
d)termination
e)translation
translation
-
An incoming tRNA (to the mRNA) with the activated amino acid enters directly in the:
a)aminoacyl-tRNA synthetase
b)anticodon of the mRNA
c)P site
d)A site
A site
-
The very first codon in mRNA is _____________.
AUG
-
The anticodon UUU has the complementary (matching) codon ___ in mRNA and the mRNA had the complementary codon ___ in DNA;
a)UUU; TTT
b)AAA; TTT
c)AAA; UUU
d)UUU; AAA
AAA; TTT
-
You find ___ inside the capsid:
a)DNA
b)p-18
c)gp-120
d)lipid membrane
e)RNAs
RNAs
-
Codon is to ___ as anticodon is to ___:
a)DNA; mRNA
b)mRNA; DNA
c)mRNA; tRNA
d)tRNA; mRNA
mRNA; tRNA
-
The useless sequences of nucleotides are called ________________.
Introns
-
The growing polypeptide slides to the ___ in order to leave the ___ opened:
a)A site; A site
b)A site; P site
c)P site; A site
d)aminoacyl-tRNA synthetase; ATP
P site; A site
-
In the activation of an amino acid, the enzyme involved is:
a)DNA helicase
b)RNA polymerase
c)tRNA
d)aminoacyl-tRNA synthetase
e)mRNA
aminoacyl-tRNA synthetase
-
The part of the process of adding amino acids to the chain of amino acids is called _____________.
Elongation
-
The RNA polymerase uses a ___ strand to make ___ giving it an exact sequence of ___:
DNA; mRNA; codons
-
The capsid of the HIV is made of _________________.
Protein P-24
-
AIDS stands for:
a)human immunodeficiency virus
b)assisted immunodeficiency simulation
c)acquired immunodeficiency virus
d)acquired immunodeficiency syndrome
acquired immunodeficiency syndrome
-
The AIDS virus is called retrovirus because the presence and action of:
a)DNA
b)twin RNAs
c)gp-120
d)lipid membrane
e)tRNA
twin RNAs
-
The first type of cell the HIV invades is:
a)cytotoxic B-cell
b)helper T-cell
c)assistant T-cell
d)red blood cell
e)helper B-cell
helper T-cell
-
The reverse transcriptases make single-stranded _________ molecules.
DNA
-
The reverse transcriptases use the ____________________ to make DNAs
RNA
-
The AIDS patient has a _____ due to the reduced count of ___:
a)strong immune system; red blood cells
b)weak immune system; white blood cells
c)weak immune system; red blood cells
d)weak immune system; low count of T-cells only
weak immune system; white blood cells
-
The capsules are directly produced inside the host by the:
a)viral mRNA
b)host’s mRNA
c)proviruses
d)viral DNAs
e)reverse transcriptases
viral mRNA
-
The HIV obtains its lipid membrane from:
a)the cell membrane of the T-cell
b)the nuclear membrane of the T-cell
c)another HIV virus
d)red blood cells
the cell membrane of the T-cell
-
This is the protein that attaches directly to the host’s receptor:
a)the lipid membrane
b)p-24
c)p-18
d)gp-120
e)viral single-stranded DNA
gp-120
-
This one goes last in the replication of the HIV:
a)the reverse transcriptases associate with the new twin RNAs
b)the single strand DNAs become double strand DNAs
c)the viral capsule disintegrates to produce molecules to take control over the host cell
d)twin RNAs with associated reverse transcriptases go inside the capsid
The reverse transcriptases associate with the new twin RNAs
-
The most external molecule in the HIV is the ______________________.
GP-120
-
The proviruses make _____________ and _____________.
Twin RNA's & mRNA's
-
The viral mRNAs make:
a)proteins of the capsule and reverse transcriptases
b)reverse transcriptases and twin RNAs
c)mRNAs and twin RNAs
d)twin RNAs and viral capsules
proteins of the capsule and reverse transcriptases
-
Made of prokaryotic cells:
a)your liver cells
b)plant cells
c)protist cells
d)bacteria
e)all of them
bacteria
-
The cellular material found inside the nucleus is called the:
a)protoplasm
b)nucleoplasm
c)cytoplasm
d)chromosomes
e)all are correct
nucleoplasm
-
Membranous structure that stores food molecules or pigments:
a)Golgi body
b)mitochondrion
c)ribosome
d)vacuole
e)chromatid
vacuole
-
One of the following is not found in plant cells:
a)centrioles
b)ribosomes
c)lysosomes
d)nucleus
e)vacuoles
centrioles
-
The cellular material surrounding the nucleus is called the:
a)protoplasm
b)nucleoplasm
c)cytoplasm
d)chromosomes
e)all are correct
cytoplasm
-
The organelle involved in cellular respiration is named __________________________.
Mitochondrion
-
They participate directly in protein synthesis in the cytoplasm:
a)genes
b)ribosomes
c)microtubules
d)lysosomes
e)DNA polymerases
ribosomes
-
It uses a template of DNA to do transcription:
a)genes
b)RNA polymerase
c)ribosome
d)lysosomes
e)DNA polymerase
RNA polymerase
-
Containing a membrane:
a)ribosomes
b)centrioles
c)mitochondrion
d)nucleolus
mitochondrion
-
These are made of proteins and nucleic acids only:
a)nucleus
b)chromatin fibers
c)nucleolus
d)rough endoplasmic reticulum and ribosomes
chromatin fibers
-
The chemical composition of lysosomes is _________________ and __________________.
Lipids & Protein
-
If your brain cells are lazy, they are not using much:
a)DNA
b)AMP
c)ATP
d)RNA
ATP
-
It has pores for communication:
a)cell membrane
b)nuclear membrane
c)lysosome
d)cytoplasm
nuclear membrane
-
The arrangement of microtubules in a cilium is:
a)9 triplets in a circle
b)10 triplets in a circle
c)9 triplets in circle and a pair in the center
d)9 pairs in a circle and a pair in the center
9 triplets in circle and a pair in the center
-
Short and numerous:
a)flagella
b)cilia
c)pseudopods
d)pseudopods, cilia and flagella
cilia
-
Temporary cytoplasmic projections for movement:
a)flagella
b)cilia
c)pseudopods
d)pseudopods, cilia and flagella
pseudopods
-
Chromatin fibers are found in the:
a)nucleus
b)nucleolus
c)smooth endoplasmic reticulum
d)cytoplasm
e)nucleoplasm
nucleoplasm
-
Two phases where chromatin fibers (not chromosomes) are present: ________________ and _________________.
Interphase & Telaphase
-
When your skin cells reproduce, your parental cells will be in Prophase as:
a)n = 23
b)2n = 23 pairs
c)n = 46
d)2n = 46 chromatids
2n = 46 chromatids
-
One of the following is a diploid cell:
a)n = 5
b)n = 6
c)2n = 7
d)2n = 8
e)c and d are correct
2n = 8
-
Chromosomes are on their way towards the equator during _____________________________.
Prophase
-
The sequence of phases in Mitotic Division is:
a)telo-, ana-, meta-, prophase
b)pro-, ana-, meta-, interphase
c)inter-, pro-, meta-, ana-, telophase
d)pro-, meta-, ana-, telophase
pro-, meta-, ana-, telophase
-
Nuclear membrane appears during:
a)interphase
b)prophase
c)telophase
d)anaphase
e)metaphase
telophase
-
A haploid cell of 4 chromosomes is in prophase. The cell, then, has:
a)4 chromatids
b)8 chromatids
c)4 single chromosomes
d)8 chromatin fibers
8 chromatids
-
A 2n = 18 cell in prophase has:
a)18 single chromosomes
b)18 chromatids
c)9 pairs of double chromosomes
d)9 pairs of chromatids
9 pairs of double chromosomes
-
The duplication of centrioles ends specifically in:
a)phase G1
b)phase G2
c)phase S
d)interphase
e)telophase
phase G2
-
Deep in your skin, your cells reproduce by:
a)mitotic division
b)meiotic division
c)a combination of mitosis and meiosis
d)sexual reproduction
mitotic division
-
The production of your sperm cells or ova is by:
a)meiotic division
b)mitotic division
c)a combination of mitosis and meiosis
d)cytokinesis, mitosis and meiosis
meiotic division
-
The cytokinesis in your cells involves a:
a)cell plate
b)cytoplasmic furrow
c)mitosis
d)telophase
cytoplasmic furrow
-
Production of mRNA is called:
a)translation
b)initiation
c)elongation
d)intron-exon
e)transcription
transcription
-
The production of a polypeptide is called _________________________________.
Transcription
-
Each set of ___ in DNA or in mRNA is known as a ___:
a)amino acids; codon
b)nitrogenous bases; anticodon
c)nucleotides; polypeptide
d)nucleotides; codon
nucleotides; codon
-
The molecule ________ provides the energy to activate the amino acids
ATP
-
The useful sets of nucleotides are named ___:
a)exons
b)introns
c)codons
d)anticodons
e)m-RNAs
exons
-
The step in the coupling of a ribosome with mRNA is specifically part of this:
a)transcription
b)initiation
c)elongation
d)termination
initiation
-
An incoming tRNA (to the mRNA) with the activated amino acid enters directly in the:
a)aminoacyl-tRNA synthetase
b)anticodon of the mRNA
c)P site
d)A site
A site
-
A stop codon is a codon:
a)for which there is not anticodon in DNA
b)like AUG
c)for which there is no anticodon in tRNAs
d)that is part of the structure of a ribosome
for which there is no anticodon in tRNAs
-
Suppose there is a mutation (change) in a DNA, the immediate consequence of it will be in:
a)translation
b)transcription
c)elongation
d)the polypeptide
translation
-
This kid has a genetic disease. This means that one or more ____ are going to be wrong (bad) in their chemical composition:
a)polysaccharides
b)lipids
c)nucleic acids
d)proteins
nucleic acids
-
The growing polypeptide slides to the ___ in order to leave the ___ opened:
a)A site; A site
b)A site; P site
c)P site; A site
d)aminoacyl-tRNA synthetase; ATP
P site; A site
-
In the activation of an amino acid, the enzyme involved is:
a)DNA helicase
b)RNA polymerase
c)tRNA
d)aminoacyl-tRNA synthetase
e)mRNA
aminoacyl-tRNA synthetase
-
The RNA polymerase uses a ___ strand to make ___ giving it an exact sequence of ___:
a)mRNA; DNA; codons
b)DNA; mRNA; anticodons
c)DNA; mRNA; codons
d)tRNA; mRNA; codons
DNA; mRNA; codons
-
The capsule of the HIV is made of ___________, __________ and __________.
GP-120 / P-18 / P24
-
The capsid is made of ____________________________.
P-24
-
The provirus is double-stranded ______________.
RNA
-
The first type of cell the HIV invades is:
a)cytotoxic B-cell
b)helper T-cell
c)assistant T-cell
d)red blood cell
e)helper B-cell
helper T-cell
-
The reverse transcriptases use ___ to make ___:
a)the capsids; DNAs
b)mRNAs; twin RNAs
c)twin RNAs; DNAs
d)the proviruses; twin RNAs and mRNAs
twin RNAs; DNAs
-
The capsules are directly produced inside the host by the:
a)viral mRNA
b)host’s mRNA
c)proviruses
d)viral DNA
e)reverse transcriptases
viral mRNA
-
HIV obtains its lipid membrane from:
a)the cell membrane of the T-cell
b)the nuclear membrane of the T-cell
c)another HIV virus
d)red blood cells
the cell membrane of the T-cell
-
The most internal molecule in the HIV:
a)a lipid membrane
b)p-24
c)p-18
d)gp-120
e)viral single-stranded DNA
p-24
-
The provirus makes:
a)proteins of the capsule and reverse transcriptases
b)reverse transcriptases and mRNAs
c)mRNAs and twin RNAs
d)twin RNAs and reverse transcriptases
e)DNAs, twin RNAs, mRNAs and reverse transcriptases
mRNAs and twin RNAs
-
Containing a membrane:
a)ribosomes
b)centrioles
c)mitochondrion
d)nucleolus
mitochondrion
-
The ____________________ are made mostly of lipids, proteins and digestive enzymes.
Lysosome
-
The ______________________________ makes ribosomes.
RER
-
The ___________ are short and numerous in a cell.
Cillia
-
It is made of flat sacs:
a)Golgi apparatus
b)smooth endoplasmic reticulum
c)rough endoplasmic reticulum
d)nucleus
Golgi apparatus
-
With digestive enzymes:
a)nucleolus
b)Golgi apparatus
c)lysosomes
d)centrioles
lysosomes
-
The ______________ proteins are found on the surface of the bilayer of __________________.
Integral & Phospholipids
-
Movement of Sodium ions from low to high concentration of them across a cell membrane:
a)simple diffusion
b)active transport
c)facilitated transport
d)osmosis
active transport
-
Movement of molecules from high to low concentration of them with the assistance of a carrier:
a)simple diffusion
b)active transport
c)facilitated transport
d)secretion
e)osmosis
facilitated transport
-
Entrance of a particle into the cell by means of the production of a vesicle:
a)endocytosis
b)facilitated transport
c)active transport
d)exocytosis
e)osmosis
endocytosis
-
Exocytosis of hormones is named _____________________________.
Secretion
-
When your white blood cells eat bacteria, the process is called:
a)endocytosis
b)phagocytosis
c)pinocytosis
d)exocytosis
e)receptor-mediated endocytosis
phagocytosis
-
Process that involves the participation of receptors and the production of vesicles to input materials in the cell:
a)receptor-mediated exocytosis
b)receptor-mediated phagocytosis
c)receptor-mediated endocytosis
d)pinocytosis-carrier-endocytosis
receptor-mediated endocytosis
-
They are numerous and short when present:
a)microtubules
b)microfilaments
c)cilia
d)flagella
cilia
-
They are hydrophilic:
a)the heads of the phospholipids
b)the tails of the phospholipids
c)the glycerol and phosphate of the phospholipids
d)b and c
the tails of the phospholipids
-
ATPs are used in large quantities during:
a)simple diffusion
b)facilitated transport
c)active transport
d)osmosis
active transport
-
Phases where chromosomes are visible:
a)interphase and prophase
b)prophase and metaphase
c)anaphase and telophase
d)interphase and telophase
prophase and metaphase
-
They are very long and thin chromosomic units attached to each other:
a)chromatin fibers
b)sister chromosomes
c)sister chromatids
d)sister centromeres
e)brother chromosomes
sister chromatids
-
The regions of attachment between chromosomic units split during:
a)Interphase
b)Anaphase
c)Telophase
d)Metaphase
e)Prophase
Anaphase
-
Chromosomes are on their way towards opposite poles during:
a)interphase
b)prophase
c)telophase
d)metaphase
e)anaphase
anaphase
-
The duplication of DNA molecules occurs specifically in:
a)phase G1
b)phase G2
c)phase S
d)interphase
e)telophase
phase S
-
Nuclear membrane disappears during:
a)interphase
b)prophase
c)telophase
d)anaphase
e)metaphase
prophase
-
A haploid cell of 10 chromosomes is in prophase. The cell, then, has:
a)10 chromatids
b)20 chromatids
c)10 single chromosomes
d)20 chromatin fibers
20 chromatids
-
A 2n = 18 cell in prophase has:
a)18 single chromosomes
b)18 chromatids
c)9 pairs of double chromosomes
d)9 pairs of chromatids
9 pairs of double chromosomes
-
The duplication of centrioles starts specifically in:
a)phase G1
b)phase G2
c)phase S
d)interphase
e)telophase
phase G1
-
Your brain cells were produced by:
a)mitotic division
b)meiotic division
c)a combination of mitosis and meiosis
d)sexual reproduction
mitotic division
-
After fertilization, the embryo increases the number of cells by:
a)meiotic division
b)mitotic division
c)a combination of mitosis and meiosis
d)cytokinesis, mitosis and meiosis
meiotic division
-
The cytokinesis in your stomach cells involves a:
a)cell plate
b)cytoplasmic furrow
c)mitosis
d)telophase
cytoplasmic furrow
-
The protein synthesis is actually the production of a:
a)polysaccharide
b)polypeptide
c)polynucleotide
d)mRNA
e)DNA
polypeptide
-
Each set of ___ in DNA or in mRNA is known as a ___:
a)amino acids; codon
b)nitrogenous bases; anticodon
c)nucleotides; polypeptide
d)nucleotides; codon
nucleotides; codon
-
In protein synthesis, the amino acids are activated by:
a)ribosome
b)ATP
c)DNA
d)mRNA
e)tRNA
ATP
-
The useful sets of nucleotides are named ___________; the useless ones are named _____________.
exons / introns
-
It takes place in the nucleus:
a)transcription
b)initiation
c)elongation
d)termination
e)translation
translation
-
The very first codon in mRNA is:
a)DNA
b)UGA
c)AUG
d)AGU
e)AGT
AUG
-
The codon TTT in DNA has the complementary (matching) codon ___ in mRNA and the matching anticodon would be:
a)AAA; TTT
b)AAA; UUU
c)UUU; AAA
d)TTT; AAA
AAA; UUU
-
Codon is to ___ as anticodon is to ___:
a)DNA; mRNA
b)mRNA; DNA
c)mRNA; tRNA
d)tRNA; mRNA
mRNA; tRNA
-
The process of adding amino acids to the chain of amino acids is called _____________________.
Translation
-
The RNA polymerase uses a ___ strand to make ___ giving it an exact sequence of ___:
a)mRNA; DNA; codons
b)DNA; mRNA; anticodons
c)DNA; mRNA; codons
d)tRNA; mRNA; codons
DNA; mRNA; codons
-
The capsule of the HIV is made of:
a)a lipid
b)protein p-18
c)protein p-24
d)gp-120
e)a - d
a - d
-
AIDS virus is called retrovirus because the presence and action of:
a)DNAs
b)tRNAs
c)gp-120
d)lipid membrane
e)RNAs
RNAs
-
The HIV doesn’t attack:
a)white blood cells
b)helper T-cells
c)macrophages
d)red blood cell
red blood cell
-
The single-stranded viral DNAs become:
a)double-stranded DNAs
b)reverse transcriptases
c)capsules
d)gp-120s
double-stranded DNAs
-
The proviruses are actually:
a)viral mRNA
b)host’s mRNAs
c)viral DNAs
d)capsids
e)reverse transcriptases
viral DNAs
-
This is the protein that attaches directly to the host’s receptor:
a)a lipid membrane
b)p-24
c)p-18
d)gp-120
e)viral single-stranded DNA
gp-120
-
This one goes first in the replication of the HIV:
a)the reverse transcriptases associate with the new twin RNAs
b)the single strand DNAs become double strand DNAs
c)the viral capsule disintegrates to produce molecules to take control over the host cell
d)twin RNAs with associated reverse transcriptases go inside the capsid
twin RNAs with associated reverse transcriptases go inside the capsid
-
The most internal molecule in the HIV:
a)a lipid membrane
b)p-24
c)p-18
d)gp-120
p-24
-
The provirus makes:
a)proteins of the capsule and reverse transcriptases
b)reverse transcriptases and mRNAs
c)mRNAs and twin RNAs
d)twin RNAs and reverse transcriptases
e)DNAs, twin RNAs, mRNAs and reverse transcriptases
mRNAs and twin RNAs
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