Which of the following is true regarding proto-oncogenes?

a. They are positive cell-cycle regulators.
b. They are negative cell-cycle regulators.
c. They are down-regulators of the cell cycle.
d. They play no role in the cell cycle.


a. They are positive cell-cycle regulators.

Biology & Microbiology

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A. Bacteria that have become resistant to specific antibiotics B. Human cells have started to be harmed by specific antibiotics C. Bacteria have become more susceptible to specific antibiotics D. Human cells that have become resistant to specific antibiotics

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An important inorganic nutrient needed by marine photosynthetic organisms is:

a. glucose. b. amino acids. c. lipids. d. nitrates. e. carbohydrates.

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Which test cannot be used for identification of a person's HIV status?

A. ELISA B. Immunochromatographic testing C. Western Blot D. Biochemical tests

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If a cell reverses the process of beta-oxidation, which of the following molecules will it make?

A) glycerol B) amino acids C) fatty acids D) nucleotides E) starch

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