An enzyme is a protein that catalyzes chemical reactions.
a. true
b. false
Answer: a. true
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Where do the molecules used as the inputs of the Calvin cycles (ATP and NADPH) come from?
A. They come from previous Calvin cycles. B. They come from the air. C. They come from the light reactions. D. They come from the sun.
The replicative form of nucleic acid in filamentous phages is
A. dsDNA. B. dsRNA. C. positive ssRNA. D. negative ssDNA.
What is the difference between a dideoxynucleotide (ddNTP) used in sequencing and regular deoxynucleotides?
a. ddNTPs are tagged with radiolabels. b. ddNTPs have 3 extra phosphate groups. c. ddNTPs lack the free 3’ OH group on the five-carbon sugar. d. ddNTPs are bound by hydrogen bonds instead of phosphodiester bonds.
When a mutation occurs during DNA replication, ____ replaces the incorrect nucleotide with the correct one after the
mismatched nucleotide has been removed. a. mismatch repair enzymes b. DNA ligase c. DNA polymerase d. telomerase e. helicase