Which stage marks the progression of HIV to AIDS?
A) stage I B) stage II C) stage III D) stage IV E) stage V
Answer: C
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Which of the following is true of the protein ubiquitination pathway?
A. The ubiquitin carboxyl terminus is covalently linked to the protein targeted for degradation. B. The ubiquitin is covalently linked to the amino terminus protein targeted for degradation. C. The protein targeted for degradation is modified by three different enzymes in the pathway. D. A single molecule of ubiquitin linked to the target protein is sufficient for destruction.
The concentration of protein in the blood is higher in post-glomerular blood than in arterial blood because
A. water concentration increases and protein concentrations decrease. B. protein is digested and then concentrated in glomerular (Bowman's) capsule. C. reabsorption of protein occurs. D. water passes into the capsule, but protein molecules are too large to move into the capsule and are concentrated in the blood. E. the kidney manufactures and then stores protein in the glomerulus.
Which complex in the electron transport chain carries electrons from cytochrome c to molecular oxygen, reducing it to water?
A) I B) II C) III D) IV E) V
Lichens are mutualisms between
A. fungi and a green plant. B. yeast and another fungi. C. fungi and a mycorrhizae. D. mycorrhizae and yeast. E. fungi and an alga.