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14 Cards in this Set
- Front
- Back
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Which of the following is a concept of the cell theory?
A. a cell is the basic structural and functional unit of living organisms B. the subcellular organelle is the basic unit of life. C. only higher oganisms are composed of cells. D. Simple cells can arise spontaneously from rotting vegetation |
A cell is the basic structural and functional unit of living organisms
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Mitosis ______.
A. produces nucleus repication B. is the formation of sex cells C. creates diversity in genetic potential D. always results in divison of a cell. |
produces nucleus replication
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Passive membrane transport processes include _____.
A. movement of water from an area of low concetration to an area of high concentration B. movement of a substance down its concentration gradient C. consumption of ATP D. the use of transport proteins when moving substances from ares of low to high concentration |
Movement of a substance down its concentration gradient
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The plasma membrane is ____.
A. the phospholipid bilayer surrounding the cell. B. a single-layered membrane that surrounds the nucleus of the cell C. a membrane composed of tiny shelves or cristae D. a double layer of protein enclosing the plasma |
the phospholipid bilayer surrounding the cell.
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Crenation is likely to occur in _____.
A. blood cells in a hypotonic solution B. blood cells in a hypertonic solution C. blood cells in blood plasma D. blood cells in an isotonic solution. |
Blood cells in hypertonic solution
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Which of the following is a principle of the fluid mosaic model of cell membrane structure?
A. phospholipids form a bilayer that is largely impermeable to water-soluble molecules B. all proteins associated with the cell membrane are contained in a fluid layer on the outside of the cell. C. The lipid bilayer is a solid a body temperature, thus protecting the cell. D. phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains. |
phospholipids form a bilayer that is largely impermeable to water-soluble molecules
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A red blood cell placed in pure water would _______.
A. neither shrink nor swell B. shrink C. swell and burst D. swell initially, then shrink as equilibrium is reached |
swell and burst
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The RNA responsible for bringing the amino acids to the "factory" site for protein formation is the _____.
A. ssRNA B. rRNA C. tRNA D. mRNA |
tRNA
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Peroxisomes _______.
A. funtion to digest particles ingested by endocytosis B. also called microbodies, contain acid hydrolases C. are able to detoxify substances by enzymatic action D. sometimes function as secretory vesicles |
are able to detoxify substances by enzymatic action
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Each daughter cell resulting from mitotic cell division has exactly as many chromosomes as the parent cell.
T/F |
True
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In osmosis, movement of water occurs toward the solution with the lower solute.
T/F |
False
(Water moves to dilute. Water will move toward the solute(salt). |
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Diffusion is always from areas of greater to areas of lesser concentration.
T/F |
True
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The process of discharging particles from inside a cell to the outside is called ____.
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Exocytosis
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Other than the nucleus, which organelle has its own DNA?
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Mitochondria
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