At which of the following checkpoints is the DNA checked for damage and, if damage is present, the cell is placed in G0 phase?
a. M
b. G2
c. G1
d. None of these are correct.
b. G2
Biology & Microbiology
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An enzyme that has been isolated from retroviruses and is used to generate cDNA is
A. transverse ligase. B. reverse transcriptase. C. reverse endonuclease. D. recombinant RNase. E. RNA polymerase.
Biology & Microbiology
Which is the first eon for which there is evidence of life?
A. Archean eon B. Proterozoic eon C. Stromatolite eon D. Hadean eon E. Phanerozoic eon
Biology & Microbiology
Carbon fixation
A) occurs when carbon atoms from CO2 are incorporated into an organic molecule. B) supplies the cell with ATP. C) occurs during the light reactions. D) provides the cell with a supply of NADPH molecules.
Biology & Microbiology
The actual process of cell division in eukaryotic cells is called
A. meiosis. B. mitosis. C. binary fission. D. cytokinesis.
Biology & Microbiology