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Micro Chapter 8 New
Test Description: New questions for chapter 8
Instructions: Answer all questions to get your test result.
1) A gene is defined as
A
a sequence of nucleotides in RNA that codes for a functional product.
B
three nucleotides that code for an amino acid.
C
any random segment of DNA.
D
a sequence of nucleotides in DNA that codes for a functional product.
2) Which of the following pairs is mismatched?
A
DNA ligase – joins segments of DNA
B
DNA polymerase – makes a molecule of DNA from a DNA template
C
RNA polymerase – makes a molecule of RNA from an RNA template
D
transposase – cuts DNA backbone, leaving sticky ends
3) According to the operon model, for the synthesis of an inducible enzyme to occur, the
A
repressor must bind to the operator.
B
substrate must bind to the enzyme.
C
substrate must bind to the repressor.
D
repressor must not be synthesized.
4) The DNA damage caused by ultraviolet radiation is usually
A
never repaired.
B
repaired by DNA replication.
C
repaired during transcription.
D
cut out and replaced.
5) Conjugation differs from reproduction because conjugation
A
copies RNA to make DNA.
B
transfers DNA horizontally, to nearby cells without those cells undergoing replication.
C
None of these are correct.
D
transfers DNA vertically, to new cells.
6) An enzyme that copies DNA to make a molecule of RNA is
A
transposase.
B
DNA polymerase.
C
DNA helicase.
D
RNA polymerase.
7) 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
All of these are true.
C
require snRNPS.
D
use codons to determine polypeptide sequences.
8) When ultraviolet light strikes DNA, it can cause a specific type of damage. How is this damage best described?
A
Thymine bases on one strand of DNA, next to each other, 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 the opposing DNA strands are covalently linked together to form a thymine dimer.
D
Adenine and thymine bases on opposing DNA strands are linked together by hydrogen bonds.
9) Transduction requires a(n) ________ to move DNA from one bacterial cell to another.
A
transposase enzyme
B
naked DNA molecule
C
F plasmid
D
bacteriophage
10) Recombination will always alter a cell#39;s genotype.
A
True
B
False
11) Both base substitution and frameshift mutations can result in the formation of premature stop codons.
A
True
B
False
12) Cell-to-cell contact is required for transduction to occur.
A
False
B
True
*select an answer for all questions
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