Which of the following groups of animals is most efficient at extracting oxygen from the atmosphere?
A) Reptiles B) Amphibians C) Birds D) Mammals E) Insects
C
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The prostate:
A. is fairly large at birth but shrinks markedly during puberty. B. secretes a milky alkaline fluid that is part of the ejaculate. C. cannot be felt in a rectal examination. D. is composed entirely of glandular tissue.
What is the name of a molecule composed of one or more sugars?
A) carbohydrate B) lipid C) nucleic acid D) polypeptide
Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. phagocytosis. B. simple diffusion. C. osmosis. D. pinocytosis. E. active transport.
Which of the following represent(s) the way(s) in which enveloped viruses acquire their envelopes?
A. Budding through internal cellular membranes. B. Viral enzymes are responsible for production of the envelope. C. Depending on the virus, budding may be either through the plasma membrane or internal cellular membranes. D. Budding through the plasma membrane.