Dna Repair And Mutation

21 Questions  I  By Clindo on June 2, 2010
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1.  The flow of genetic material in microbial cells usually proceeds from
A.
B.
C.
2.  A new copy of a DNA molecule is precisely synthesized during a process called
A.
B.
C.
3.  The final step in gene expression is protein synthesis, or
A.
B.
C.
4.  The chromosome of almost all bacteria is in the shape of
A.
B.
C.
5.  The enzyme that catalyzes the synthesis of DNA is called
A.
B.
C.
6.  DNA polymerase catalyzes the synthesis of DNA in the
A.
B.
C.
D.
7.  The actual process of protein synthesis takes place on ribosomes that serve as workbenches, with _____________ acting as the blueprint or template.
8.  The bases of one strand of DNA match-up with the bases of the second strand according to base pairing rules, therefore, the two strands are said to be
A.
B.
C.
9.  The enzymes that unwind short stretches of DNA helix immediately ahead of a replication fork are
A.
B.
C.
D.
E.
10.  The enzyme that repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides is
A.
B.
C.
D.
E.
11.  Another name for the RNA polymerase recognition/binding site upstream of a gene is the
12.  The ____________ is nontranslated sequence that is located between the transcription start site and the translation start site
13.  The Shine-Dalgarno sequence is
A.
B.
C.
14.  Most procaryotic proteins begin with this modified amino acid
A.
B.
C.
15.  Mutations that arise without exposure to external agents are called
A.
B.
C.
16.  A mutagen is
A.
B.
C.
17.  A mutation that affects only a single nucleotide is called
A.
B.
C.
18.  A nonsense mutation results in
A.
B.
C.
19.  The process by which thymine dimers are directly repaired with the help of visible light is called
A.
B.
C.
20.  DNA repair mechanisms are able to distinguish newly synthesized DNA strands from older strands because
A.
B.
C.
21.  The ability of the anticodon of tRNA to interact with multiple codons of mRNA is called
A.
B.
C.
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