Which of the following would decrease then activity of the sodium/potassium ATPase pump

a. hypoxia (low oxygen)
b. high oxygen
c. low ATP levels
d. none of the above


Ans: c. low ATP levels

Biology & Microbiology

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Which phenotypic assay could be used to determine whether a new Streptococcus sp. is of the pyogenes or viridans group?

A) catalase assay with H2O2 B) hemolytic type after growth on a blood agar plate C) occurrence of cells being in clusters or as individual cells under a microscope D) product(s) formed during lactose fermentation

Biology & Microbiology

RNA differs from DNA in that:

a. RNA pairs cytosine with uracil. b. RNA pairs thymine with uracil. c. RNA is double-stranded and DNA is single-stranded. d. RNA is single-stranded and DNA is double-stranded.

Biology & Microbiology

Your friend is trying to tell you that human teeth are not alive. You disagree. Why would you say that a tooth in an adult is alive?

What will be an ideal response?

Biology & Microbiology

To join a fragment of human DNA to bacterial or yeast DNA, both the human DNA and the bacterial or yeast DNA must first be treated with the same

A) DNA ligase. B) DNA gyrase. C) restriction enzyme. D) DNA polymerase.

Biology & Microbiology