-
Scientists do this so others can try to reproduce the results, repeat their work, and their experiment procedures can be reviewed.
publish results
-
This allows cells in multi-cellular organisms to perform different functions.
cell specialization
-
Instrument used to view highly magnified 3-dimensional images of the surface of objects.
scanning electron microscope
-
These are important when working with animals, in the field, and in the lab.
safety procedures
-
Science is different than other disciplines because it relies on ____ ____.
testing explanations
-
When a hypothesis has enough supporting data, it becomes a ____.
theory
-
Factors that living things respond to.
light, temperature
-
A single cell develops to form a group of cells which is called a ____ ____.
cell culture
-
These can arise from an informed, creative imagination, from prior knowledge, or from logical inferences.
hypotheses
-
Internal conditions remain fairly constant.
homeostasis
-
Instrument used to separate substances from each other.
centrifuge
-
This can be tested by scientists.
hypothesis
-
A well tested explanation.
theory
-
A term that includes the sciences of zoology, botany, and paleontology.
biology
-
Different cell parts are separated by this technique.
cell fractionation
-
Level of organization that includes all other levels.
ecosystem
-
Explains why birds migrate for the winter.
response to environment
-
Type of electron that is available to form bonds.
valence
-
Have H+ ion concentration that are lower than pure water.
base
-
Process when one chemical changes into a different one.
chemical reaction
-
these change the speed of reactions in living cells
enzymes
-
these are made up of electrons, protons, and neutrons
atoms
-
most abundant compound found in living things
water
-
an example of a carbohydrate
monosaccharide
-
describes how chemical reactions that release energy often happen
spontaneously
-
atoms of the same element with the same number of protons but with a different number of neutrons
isotope
-
type of mixture produced when sugar or salt is stirred into boiling water
solution
-
type of compound that can control the rate of reactions, help to fight disease, build tissues, and regulate cell processes
proteins
-
type of compound that work best at a specific pH, are classified as proteins, and their shape allows them to do their job
enzymes
-
these can be used to treat cancer, be used as "traces" in organisms, determine ages of rocks and fossils, and kill bacteria that spoil food
radioactive isotopes
-
scale used to measure acid-base levels
pH
-
the ingrediants in a chemical reaction that start the reaction
reactants
-
these lower the activation energy of a chemical reaction
catalysts
-
sharing of a pairs of electrons
covalent bond
-
this is what a catalyst can do
accelerates chemical reaction
-
type of image produced by a scanning electron microscope
3-dimensional
-
organelle that breaks down food into molecules the cell can use
lysosome
-
you will not find this structure in animal cells
cell wall
-
type of organism that has specialized cells to perform different tasks
multi-cellular
-
a group of organs that work together to perform a specific function
organ system
-
first to identify and see cork cells
Robert Hooke
-
cells that lack a nucleus
prokaryotic
-
structure that makes proteins using instructions from the nucelus
ribosome
-
structure that regulates what enters and leaves the cell
cell membrane
-
examples of an organ
heart
-
cells, tissues, organs, organ systems
levels of organization
-
found that all plants and animals are made of cells
Schleiden & Schwann
-
type of cells that contain a nucleus
eukaryotes
-
this organelle is found in plant cells, but not in animal cells
chloroplast
-
moelcules constantly move and collide with each other
diffusion
-
nerve, muscle, and connective are all types of ____
tissues
-
the cell theory applies to ____
all cells
-
chromatin, DNA, and the nucleolus are found in the ____
nucleus
-
microtubules and microfilaments carry out ____
cell movement
-
requires a cell to expend energy to move materials across the membrane
active transport
-
a group of similar cells that perform a particular function
tissue
-
type of instrument that can reveal details 1000 times smaller than with a light microscope
electron microscope
-
organelle found in the cytoplasm that is involved in protein synthesis
ribosome
-
cell structure that helps the cell move and maintain its shape, and helps organelles move within the cell
cytoskeleton
-
an animal cell in fresh water will burst from ____ ____ that causes water to move into the cell
osmotic pressure
-
DNA is found in the ____ in eukaryotes
nucleus
-
all three types of RNA are involved in ____ ____
protein synthesis
-
genes contain instructions for assembling ____
proteins
-
the lac operon in E. coli controls the breakdown of ____
lactose
-
these determine the location of a dog's ears on its head
HOX genes
-
these become more tightly packed during mitosis
nucleosomes
-
what does transcription produce?
RNA
-
this type of RNA is a blueprint of the genetic code
mRNA
-
lac genes bind to the ____ when the lac repressor turns off the genes
operator
-
DNA with one new strand and one original strand
replicated DNA
-
RNA is transcribed from DNA in the ____
nucleus
-
type of mutation that is not categorzied as a gene mutation
inversion
-
found in prokaryotes but is not part of a eukaryotic gene
operon
-
in DNA, the percentage of pyrimidines is equal to the percentage of purines; this is due to ____ ____
base pairing
-
phosphate groups, cytosine, and guanine are found in ____ ____
DNA & RNA
-
because there are 64 different combinations of triplets but only 20 amino aicds, amino acids can be specified for by more than one kind of ____
codon
-
in eukaryotes, ____ ____ allows for cell specialization
gene regulation
-
HOX genes determine an animal's ____ ____ ____
basic body plan
-
RNA is found in how many main types?
3
-
Plants use carbon dioxide, water, and sunlight for photosynthesis to produce ____ and ____
oxygen and high energy sugars
-
chlorophyll is found in what part of the chloroplast?
thylakoid
-
where in the chloroplast does the Calvin cycle take place?
stroma
-
the increase in what environmental factor causes the rate of photosynthesis to increase and then level off?
light
-
organisms that cannot make their own food
heterotrophs
-
light, carbon dioxide, and water are all used in the reactions of
photosynthesis
-
the place where the light-dependent occur
thylakoid membrane
-
the main product of the Calvin cycle
high energy sugars
-
scientist that concluded that plants gain most of their mass from water
van Helmont
-
According to the equation of photosynthesis, 6 molecules of carbon dioxide will produce 6 molecules of ____
glucose
-
Photosystems I and II are found in the ____ ____
thylakoid membrane
-
the gas released by a plant growing in sunlight
oxygen
-
chlorophyll does not absorb light well in the ____ region of visible light
green
-
a stack of thylakoids is defined as a ____
granum
-
the substance needed to start glycolysis
glucose
-
the substance needed to start the Krebs Cycle
pyruvic acid
-
can be produced from the energy of the electrons passing along the electron transport chain
ATP
-
cellular respiration produces ____ ATP molecules from 1 molecule of glucose
36
-
glycolysis requires an input of ____ to start
energy
-
produced by the Krebs cycle
electron carriers
-
____ ____ releases energy more slowly than fermentation does
cellular respiration
-
6CO2 C6H12O6 ----> 6CO2 + 6H2O is the equation for ____ ____
cellular respiration
-
ATP, NADH, and pyruvic acids are all products of ____
glycolysis
-
this type of "chain" can be found in plants, animals, and prokaryotes
electron transport
-
what cellular respiration breaks down to release energy?
food molecules
-
this causes bubbles to form in bread during bread making
alcoholic fermentation
-
the organelle where electron transport occurs in eukaryotes
mitochondria
-
this is a product of cellular respiration
water
-
this is needed for the conversion of pyruvic acid into lactic acid
NADH
-
glycolysis produces a net gain of ____ ATP molecules
2
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