|
Molecular
Biology Practice Questions - Set A |
|
|
1. What enzymes are required for DNA
replication a. DNA polymerase, DNA Ligase b. DNA polymerase, DNA Ligase, Helicases c. DNA Ligase only d. DNA
Polymerase only e. DNA polymerase, DNA Ligase, Helicases
and RNA Polymerase 2. Which of the following pairs is
mismatched? a. DNA
polymerase─makes a molecule of DNA from a DNA
template b. RNA
polymerase─makes a molecule of RNA from an
RNA template c. DNA
ligase─joins segments of DNA. d. RNA
polymerase─makes a molecule of RNA from a DNA
template e. None
of the above 3. Which of the following is NOT part of
the central dogma involving information transfer in cells? a. Replication b. Transformation c. Translation d. Transcription 4. An enzyme produced in response to the
presence of a substrate like lactose is called a. An
inducible enzyme b. A
repressible enzyme c. A
restriction enzyme d. An
operator e. A
promoter Use
the following information for the next four questions: Codon on mRNA and corresponding amino acid UUA leucine UAA nonsense GCA alanine AAU asparagine AAG lysine UGC cysteine GUU valine UCG serine UCU serine 5. If the sequence of amino acids coded
for by a strand of DNA is serine‑alanine‑lysine‑leucine,
what is the order of bases in the strand of DNA? a. UGUGCAAAGUUA b. TCGGCAAAGTTA c. TCTCGTTTGTTA d. TGTGCTTTCTTA e. AGAGCTTTGAAT 6. The antisense strand of DNA coding
for the polypeptide leucine‑lysine‑leucine-serine
is a. 3'--ACAGTTTCAAT b. 3'--AGCCGTTTCAAT c. 3'--TCACGUUUCAAU d. 3'--UCUCGAAAGUUA e. 3'--AATTTCAATAGA
7. The anticodon
for asparagine is a. GUU b. UUA c. CTT d. CAA e. GTA 8. What is the sequence of amino acids coded
for by the following sequence of bases in a strand of DNA? (Ignore the need
for a start codon) 5'--AAT TGC
GTT TCG--3' a. Leucine‑arginine‑lysine‑alanine. b. Asparagine‑arginine‑lysine‑alanine. c. Asparagine‑cysteine‑valine‑serine. d. Transcription
would stop at the first codon e. Cannot
be determined 9. In the polymerase chain reaction the
necessary ingredients for DNA synthesis can be mixed together in a test
tube. The DNA polymerase is from Thermus aquaticus
and the template is from a human cell.
The DNA synthesized would be most similar to which of the following? a. Human
DNA b. T.
aquaticus DNA c. A
mixture of human and T. aquaticus DNA d. Human RNA e. T. aquaticus RNA 10. A mutation will result is which of the
following? a. a
change in tRNA sequence b. a
change in rRNA sequence c. a
change in DNA sequence d. a
change amino acid sequence e. both
c and d 11. A major difference between DNA
polymerase and RNA polymerase is that DNA polymerase requires which of the
following? a. an
RNA template b. a
3' –OH nucleotide primer c. uracil as one of its bases d. double
stranded DNA e. nucleotide
monophosphates 12. Which of the following is not required
for DNA polymerase? a. template b. primer c. ATP d. UTP c. CTP |
|
|
Draw
and label a diagram of DNA replication, transcription and translation. What
were the contributions of the following? Mendel Morgan Beadle
& Tatum Avery
& MacLoed Watson
& Crick Hershey
& Chase |
|
|
Answers 1. E 2. B 3. B 4. A 5. B 6. E 7. B 8. C 9. A 10. C 11. B 12. D |
|
|
|
|
|
|
|