Which reaction is NOT an exergonic reaction?
a. protein synthesis
b. explosion
c. fire
d. respiration
e. movement
Answer: a
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Diazotrophs are found in all three domains of life
Indicate whether the statement is true or false.
Which PCR step causes the denaturation of double-stranded DNA?
A. Add primers. B. Heat target DNA to 94°C. C. Add DNA polymerase and nucleotides at 72°C. D. Repeat the cycle of heating and cooling. E. Cool DNA to between 50°C and 65°C.
In the accompanying figure, the purpose of growing the donor cells in nutrient-limited media is to:
a. have small cells that would be easier to manipulate.
b. replicate a normal environment.
c. force the donor cell nucleus into the G0 cell stage.
d. induce favorable mutations.
e. initiate apoptosis.
Chordae tendineae:a
hold the AV valves in place. b. contract when the heart contracts. c. are one part of the conductance system of the heart. d. regulate blood flow into the ventricles. e. are stretched during ventricular systole