What is a disadvantage of the exoskeleton?
a. It cannot be replaced if damaged.
b. It must be shed to accommodate growth.
c. It is easily penetrated by predators.
d. It requires high ATP levels for continuous growth.
e. It does not permit movement of the organism.
b
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Yeast is used to produce beer and wine but can also make bread rise. All of these processes involve the production of alcohol. Explain why you can eat bread and not get drunk.
A. The bread-making process produces ethyl alcohol, not isopropyl alcohol. B. The amount of alcohol produced is too small to be noticeable. C. The heat of cooking bakes out the alcohol. D. The bread-making process produces isopropyl alcohol, not ethyl alcohol.
Ligand binding to a receptor kinase results in:
A. phosphorylation of the cytoplasmic domain of the receptor. B. binding of cytoplasmic signaling molecules. C. receptor dimerization. D. All of these answer options are correct.
The process illustrated in the figure is a step in
a. the production of recombinant DNA. b. probing for transferred genes. c. DNA fingerprinting. d. sequencing DNA. e. producing radioactive probes.
What provides the greatest visual acuity (the precise
discrimination between adjacent points in space) in the human eye? a. photoreceptors in the sclera b. photoreceptors in the fovea c. protein filaments in the lens d. photoreceptors in the optic nerve e. none of these