Members of a protein family often contain the same folding domain

a. true
b. false


Ans: a. true

Biology & Microbiology

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Bacterial resistance to penicillin began to appear ____

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How many distinct evolutionary branches exist in the domain Archaea, as revealed by genome sequencing studies?

a. two b. three c. four d. five e. at least six

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What role do rhizoids perform in mosses?

a. They structurally support the sporophyte stalk. b. They anchor the gametophyte. c. They take up water. d. They absorb nutrients. e. They act as a root underground.

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The only source of all new alleles is:

a. natural selection. b. genetic drift. c. gene flow. d. mutation. e. genetic polymorphism.

Biology & Microbiology