Which of the following does not always alter the activity of the enzyme?

a. temperature
b. pH
c. reactant concentrations
d. inhibitors
e. lack of required cofactors


C

Biology & Microbiology

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Which of the following conclusions can be made if two identical insertion sequences are identified in separate locations on a chromosome?

A. The insertion sequence was transferred via simple transposition. B. The insertion sequence was a "cut-and-paste" transposon. C. A mutation occurred during transposition of the insertion sequence. D. The insertion sequence was transferred via replicative transposition.

Biology & Microbiology

The two major categories of extracellular signal molecules that bind to cell surface receptors are ____

a. peptide hormones and steroid hormones b. steroid hormones and neurotransmitters c. neurotransmitters and vitamins d. growth hormones and vitamins e. peptide hormones and neurotransmitters

Biology & Microbiology

The person credited with being the co-discoverer of

evolution by natural selection was a. Alfred Wallace. b. Charles Lyell. c. Thomas Malthus. d. James Hutton. e. John Henslow.

Biology & Microbiology

The first eukaryotic cells to evolve from ancestral prokaryotes were:a

fungi. b. protists. c. endosymbionts. d. plants. e. animals

Biology & Microbiology