A __________ is the physical expression of the genes present, and can change depending upon what genes are turned "on".
A) plasmid
B) chromosome
C) phenotype
D) genotype
Ans: C) phenotype
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Which best describes energy production during cellular respiration?
A. A small amount of energy is produced by substrate level phosphorylation; most is produced by oxidative phosphorylation. B. A small amount of energy is produced by oxidative phosphorylation; most is produced by substrate level phosphorylation. C. An equal amount is produced by oxidative and substrate level phosphorylation. D. It depends on the organism. Some produce most of their energy by substrate level phosphorylation, and some produce most of their energy by oxidative phosphorylation. E. None of these answer options accurately describes energy production during cellular respiration.
Proteins that speed metabolic reactions might have first formed when reactants could have begun interacting inside
tiny holes in rocks near deep-sea __________. Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT a form of
passive transport? a. osmosis b. facilitated diffusion c. simple diffusion d. exocytosis e. none of these
The most likely cells to be lysed when treated with anti-CD4 antibody and complement are
A. Cytotoxic t cells B. Macrophages C. Helper T cells D. B cells