True or False:Something must have all the characteristics of life to be considered alive.
True
What is a localized group of the same species that can interbreed to produce fertile offspring called?
C. population
Which of these categories in the hierarchy of life is the most inclusive?
E. ecosystem
Which of these scenarios demonstrates the biological theme of interaction of organisms with their environment?
A. grasshopper eating a leaf
True or False:
Evolution is the overarching theme of biology.
True
To which domain do humans belong?
C. Eukarya
Which variable is measured during a scientific experiment?
B. dependent
In an experiment where 100 people are asked to choose their favorite color from a list of 7 different colors, what will the degrees of freedom be for a Chi-square test?
B. 6
True or False:
The independent variable in an experiment may have an effect on the dependent variable.
True
True or False:
If the p-value in a chi-square test is less than 0.05, then we reject the null hypothesis.
True
What does the number of protons in an atom determine?
Atomic number
What is the most common atom in the human body? a. oxygen b. carbon c. hydrogen d. nitrogen e. calcium
a. oxygen
What is the charge on an atom with 6 neutron, 6 protons, and 6 electrons a. negative 6 b. positive 6 c. neutral d. negative 1 e. positive 1
c. neutral
True or False:
The energy shell closest to the nucleus in an atom contains electrons with the lowest potential energy.
True
Which of these types of bonds is the strongest? a. covalent b. ionic c. hydrogen d. all are equally strong
a. covalent
Which type of bond consists of two electrons equally shared between the atoms in the bond? a. polar covalent b. nonpolar covalent c. ionic d. hydrogen e. none of the above
nonpolar covalent
True or False:
Hydrogen bonds occur between water molecules while covalent bonds occur within a single water molecule.
True
True or False:Ionic compounds can often form crystals.
True
True or False:
Ice is less dense than water.
True
Which of these is NOT true about water? a. Water is cohesive. b. Water is adhesive. c. Water takes a long time to cool compared to air. d. Water takes a long time to heat compared to air. e. All of the above
e. All of the above
True or False:A solution with a high pH has a relatively high concentration of hydrogen ions.
False
What are the 4 elements that make up the majority of the human body?
Carbon, hydrogen, oxygen, and nitrogen
Which functional group is composed of one N and two Hs? a. amino b. sulfhydryl c. phosphate d. methyl e. none of the above
a
Which of these is/are structural proteins? a. starch b. glycogen c. cellulose d. a & b e. none of the above
c. cellulose
True or False:Polysaccharides are made by joining monosaccharides by dehydration synthesis.
true
Which type of lipid contains a glycerol backbone and three fatty acids? a. triglyceride b. wax c. steroid d. phospholipid
a. triglyceride
True or False:Phospholipids contain a polar head group and a nonpolar tail.
true
True or False:Cholesterol is the precursor molecule for the steroid hormones.
true
True or False:Cholesterol is the precursor molecule for the steroid hormones.
true
How many unique proteins can be made from a chain of amino acids that is 3 amino acids long? a. 1 b. 3 c. 20 d. 8,000 e. none of the above
d. 8,000
Which of these components is the same in every amino acid? a. R group b. carboxyl group c. hydrogen d. amino group e. a & c f. b, c, & d g. All are unique in every amino acid.
f
In which structural level do the R groups of amino acids interact to cause folding? a. primary b. secondary c. tertiary d. quaternary
c. tertiary
Which molecule is the energy currency of cells? a. carbohydrates b. lipids c. proteins d. DNA e. ATP
e. ATP
True or False:DNA and RNA contain the same sugar.
false
True or False: Muscle cells contain a lot of mitochondria because they need a lot of energy to function.
true
What is the site of aerobic cellular respiration in cells? a. mitochondria b. chloroplasts c. Golgi apparatus d. peroxisomes e. ribosomes
a. mitochondria
What is/are the main function/s of the cytoskeleton a. support b. motility c. regulation d. a, b, & c e. a & b f. none of the above
d. a, b, & c
Which are the thickest elements of the cytoskeleton? a. microfilament b. microfiber c. intermediate fiber
b. microfiber
Which of these are tenets of cell theory? a. all cells come from pre-existing cells b. the cell is the fundamental unit of life c. all organisms are composed of cells d. a, b, & c e. a & b f. a & c
d. a, b, & c
True or False:Eukaryotic cells are more efficient than prokaryotic cells because they have compartments called organelles.
true
How much bigger are typical eukaryotic cells than prokaryotic cells? a. 0X, they are the same size b. 1-10X c. 10-100X d. 100-1000X e. 1000-10,000X
c. 10-100X
True or False:Surface area increases faster than volume as cell size gets larger.