A(n) ________ operon is one whose transcription is decreased by effector molecules.

A. compressible
B. coinducible
C. inducible
D. repressible
E. activated


Answer: D

Biology & Microbiology

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A severe disease that is inherited as an autosomal recessive trait is more likely to skip generations in a pedigree than an autosomal recessive trait that causes a harmless phenotypic variant because

A) a person with the harmless variant is less likely to reproduce than a person with the disease. B) a person with an autosomal recessive disease is less likely to be well enough to reproduce than a person with a harmless trait variant. C) all inborn errors of metabolism are dominant. D) a family with an autosomal recessive disease is usually much smaller than a family with an autosomal recessive harmless trait variant.

Biology & Microbiology

Neanderthals were members of

a. Australopithecus robustus. b. Homo habilis (early Homo). c. Homo erectus. d. Homo sapiens. e. none of these.

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Which of the following is (are) true concerning “low

carb” diets? a. They may produce rapid weight loss. b. Their long-term effects are not known. c. They can result in kidney damage. d. They may promote the increased consumption of saturated fats. e. All of these are true.

Biology & Microbiology

One of the focuses of conservation biology is changing human behavior.

a. true b. false

Biology & Microbiology