Reading Quiz Honors Pp. 516-517
8 Questions
| Attempts: 55
Quiz on types of gene mutations and transposons.
Questions and Answers
- 1.
Which item below is NOT a type of gene mutation?
- A.
Frameshift
- B.
Point
- C.
Substitution
- D.
Deletion
- E.
Translocation
Correct Answer
E. TranslocationExplanation
The first four terms all refer to changes in a gene due to inserting, deleting, or substituting a nucleotide base.Rate this question:
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- 2.
A change in a single nucleotide in a gene will always result in an amino acid change.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Because there are 61 codons and only 20 amino acids, there is more than one codon that codes for some amino acids.Rate this question:
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- 3.
Using the chart in your book on page 507, answer the following:A DNA sequence in a gene originally reads "CGA" It is transcribed into mRNA which then codes for an amino acid. If the DNA is changed to "CAA" what effect will be seen?
- A.
No change in the amino acid
- B.
The amino acid alanine will be changed to valine
- C.
Instead of an amino acid, there will be a stop codon.
Correct Answer
B. The amino acid alanine will be changed to valineExplanation
This is a missense mutation which results in a change in the amino acid coded for.Rate this question:
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- 4.
Which would result in a more drastic change in the protein formed?
- A.
Frameshift mutation
- B.
Point mutation
- C.
Both are equally as bad
Correct Answer
A. Frameshift mutationExplanation
Frameshift because every amino acid from the point of the insertion or deletion is changed.Rate this question:
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- 5.
Most errors in DNA coding are corrected as the DNA polymerase proofreads the new strand as it forms.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
This is a job of DNA polymerase in addition to joining nucleotides together.Rate this question:
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- 6.
All genetic material is in a fixed position on a chromosome.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Believed to be true but disproved by Barbara McClintock.Rate this question:
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- 7.
What are these "jumping genes" known as today?
- A.
Introns
- B.
Exons
- C.
Transposons
- D.
Mutagens
Correct Answer
C. Transposons -
- 8.
Transposons have been discovered in other types of organisms in addition to the original discovery in corn.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Bacteria, fruit flies, and humans.Rate this question:
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Mar 20, 2022Quiz Edited by
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Feb 12, 2010Quiz Created by
Brabio69
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