Micro Chapter 8 New Question Preview (ID: 62837)
New Questions For Chapter 8.
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A gene is defined as
a) any random segment of DNA.
b) three nucleotides that code for an amino acid.
c) a sequence of nucleotides in DNA that codes for a functional product.
d) a sequence of nucleotides in RNA that codes for a functional product.
Which of the following pairs is mismatched?
a) RNA polymerase – makes a molecule of RNA from an RNA template
b) DNA polymerase – makes a molecule of DNA from a DNA template
c) DNA ligase – joins segments of DNA
d) transposase – cuts DNA backbone, leaving sticky ends
According to the operon model, for the synthesis of an inducible enzyme to occur, the
a) substrate must bind to the enzyme.
b) substrate must bind to the repressor.
c) repressor must bind to the operator.
d) repressor must not be synthesized.
The DNA damage caused by ultraviolet radiation is usually
a) repaired by DNA replication.
b) never repaired.
c) repaired during transcription.
d) cut out and replaced.
Conjugation differs from reproduction because conjugation
a) transfers DNA vertically, to new cells.
b) copies RNA to make DNA.
c) None of these are correct.
d) transfers DNA horizontally, to nearby cells without those cells undergoing replication.
An enzyme that copies DNA to make a molecule of RNA is
a) RNA polymerase.
b) DNA polymerase.
c) DNA helicase.
d) transposase.
Protein synthesis in eukaryotes is similar to the process in prokaryotes in that both eukaryotes and prokaryotes
a) use methionine as the start amino acid.
b) require snRNPS.
c) use codons to determine polypeptide sequences.
d) All of these are true.
When ultraviolet light strikes DNA, it can cause a specific type of damage. How is this damage best described?
a) Thymine bases on the opposing DNA strands are covalently linked together to form a thymine dimer.
b) Adenine and thymine bases on opposing DNA strands are covalently linked together to form an AT dimer.
c) Thymine bases on one strand of DNA, next to each other, are covalently linked together to form a thymine dimer.
d) Adenine and thymine bases on opposing DNA strands are linked together by hydrogen bonds.
Transduction requires a(n) ________ to move DNA from one bacterial cell to another.
a) bacteriophage
b) transposase enzyme
c) F plasmid
d) naked DNA molecule
Recombination will always alter a cell#39;s genotype.
a) True
b) False
c)
d)
Both base substitution and frameshift mutations can result in the formation of premature stop codons.
a) True
b) False
c)
d)
Cell-to-cell contact is required for transduction to occur.
a) True
b) False
c)
d)
Transduction was first demonstrated by the Griffith's experiment.
a) True
b) False
c)
d)
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