An amino acid contains a structural "backbone" chain of

A. nitrogens.
B. phosphorus atoms.
C. carbons.
D. carbon and phosphorus atoms.
E. nitrogens and carbons.


E. nitrogens and carbons

Biology & Microbiology

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Human cancer causing viruses most often have a ________ genome.

A. ssDNA B. dsRNA C. ssRNA D. dsDNA

Biology & Microbiology

Which of the following statements about the life cycle of a crab is true? a. Most species of crab are hermaphrodites

b. A female crab hides fertilized eggs under a rock in a sheltered spot and guards them until they hatch. c. A crab larva will molt as it grows. d. Young crabs look like miniature adults as soon as they hatch from their eggs.

Biology & Microbiology

In which demographic model is population growth the fastest?

a. preindustrial b. transitional c. industrial d. postindustrial e. agricultural

Biology & Microbiology

In the accompanying figure, the structure labeled “H” is a ____

a. muscle fiber b. sarcoplasmic reticulum c. mitochondria d. myofibril e. Z line

Biology & Microbiology