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agg0006
on FreezingBlue Flashcards.
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Which of the following is a cell?
a. chicken egg yolk b. bacterium c. sperm d. nerve
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Which phrase best describes the inside of a cell?
full of diverse structures
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What is NOT a function of the cell membrane?
reproduction
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Following Hooke's identification of cells with a microscope, how long was it before scientists accepted the cell as the unit of life?
two centuries
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The most sophisticated optical microscopes today can magnify items more than
1000 times
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The hydrophobic ends of a cell membrane's lipid bilayer are
pressed together
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Which pair of organelles transfers energy in the cell?
mitochondria and chloroplasts
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Which is true of ATP?
a. ATP is a molecule.b. ATP is an energy carrier.c. ATP contains sugar.d. ATP contains phosphorous.
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In the process of photosynthesis
light energy is converted to chemical energy
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An organelle not found in the cells of animals is
chloroplast
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A cell's receptor molecule
binds to a molecule to facilitate transfer across the cell membrane.
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Which one of the following is in all cells?
DNA
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Which of the following is a stored energy end product of fermentation?
alcohol
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What is the chief function of the mitochondria?
to create energy
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Which organelle gives the cell a shape?
cytoskeleton
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Which of the following phrases would not be in the definition of photosynthesis?
starches and fats
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The end product for glycolysis is
pyruvic acid and ATP.
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Chromosomes
a. were first discovered in the nineteenth century. b. are long strands of DNA c. come in pairs, located in the nucleus. d. vary in number with the species.
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Fermentation in plants produces ________; fermentation in animals produces
alcohol; lactic acid
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Anaerobic processes release more energy than aerobic processes.
f
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The mitochondria are thought to be a recent cell mutation.
f
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Only cells can produce other cells.
t
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Cytoplasm is the fluid that takes up spaces between the organelles of a cell.
t
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The resolving power of an electron microscope is limited by the wavelength of the light used to illuminate the specimen.
f
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The primary difference between a prokaryote cell and a eukaryotecell is the nuclear membrane in the latter.
t
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Chloroplasts in plant cells and mitochondria in animal cells are both energy-processing organelles.
t
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Cell membranes can deform to encapsulate a particle and transport it within the cell.
t
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The cytoplasm is to a cell what a skeleton is to a horse
f
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ATP is a molecule that stores and carries energy in its phosphate bonds.
t
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Some cells, like bacteria, do not have a nucleus.
f
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Cellulose and other strong polymers give plant cells support by surrounding the plant cell membrane.
t
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The Krebs cycle happens during the final stages of respiration.
t
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Adenosine triphosphate is an organic molecule that includes ribose sugar in its structure.
t
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What limits the resolving power of all microscopes?
the wavelength of the light used
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Which is the best analogy for a cell membrane?
ping pong balls covering a birdbath
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What advantage does the structure of the cell membrane afford the cell?
the lowest possible energy state
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Which of the following statements about cells is true?
Meiosis produces cells with half the normal complement of DNA
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What does current theory say about the origin of the nucleus?
A small cell was engulfed by a larger cell.
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Which statement is false?
Anaerobic reactions yield more energy per molecule of glucose than aerobic reactions.
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The more chromosomes an organism has, the more complex it is.
False
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During photosynthesis, the chlorophyll molecule in green plants can absorb the Sun's energy only in the wavelength of green light.
f
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Assembling an ATP molecule is an endothermic process in the cell
t
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Receptor molecules in the cell membrane are open gates to all molecules with hydrogen bonds.
f
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