Cells found in plants and animals have similarities but can differ in function. Consider the following two organisms: a corn plant cell (Zea mays) and a camel cell (Bactrianus ferus). What is the best explanation for the difference in the cellular vacuole size between these two biotic organisms?
A. The corn cells' have a small vacuole size because it does not need long term water and electrolyte storage.
B. The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage.
C. The camel cells' have a small vacuole size because it is not in contact with toxins that need to be removed from the cell.
D. The corn cells' have a large vacuole size because it is in contact with many toxins in the soil which need to be removed from the cell.
Ans: B. The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage.
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A. inhabit the stomach. B. inhabit squid ink sacs. C. cause crown gall in plants. D. have axonemes.
Translational controls of protein levels in bacteria are governed by:
a. the rate at which small and large subunits of ribosomes assemble. b. the rate at which the cap and tail of pre mRNA are removed. c. the rate at which ribosomes attach to mRNA molecules. d. the concentration of proteins in the cytoplasm. e. the rate at which sugars are incorporated into the cell.
Antibodies are
A. specific molecules, or parts of molecules, that the body recognizes as foreign B. cells that protect the body against invaders C. enzymes secreted to destroy a pathogen's cell wall D. proteins the body produces against invading substances E. proteins on the surface of our cells to which pathogens attach
In an experiment in the laboratory, a small colored molecule is injected into one cell. Within minutes, the molecule has entered the adjacent cells. What type of junctions connect these cells?
A. tight junctions B. gap junctions C. free junctions D. actin junctions E. adhesion junctions