BIO 133 EXAM 3 QUESTIONS AND ANSWERS
Epigenetic changes - Answer -pass from one cell generation to the next but do not alter
the DNA sequence.
Many patients who have a certain blood clotting disorder in which the blood clots too
readily have a mutation in the promoter of a gene. This mutation most likely - Answer -
increases the transcription rate of a particular clotting factor gene.
Chromatin remodeling can act as an on/off switch for __________, while microRNA
binding can block __________. - Answer -transcription; translation
The main limitation of a drug that treats disease by altering chromatin remodeling is that
- Answer -it would change the expression of many other genes.
Histone proteins - Answer -control gene expression through chemical interactions that
expose parts of the DNA to transcription factors, while shielding other parts.
Which metaphors correctly compare chromatin remodeling and microRNA function? -
Answer -An on/off switch and a dimmer switch
Multiple proteins can be produced from a single gene by - Answer -alternative splicing
A mutation is - Answer -a change in a DNA sequence.
A germline mutation passes from generation to generation because it occurs during the
DNA replication before - Answer -meiosis
A chemical or physical agent that causes mutations is called a - Answer -mutagen
A man and woman of normal height have a son with achondroplasia. They want to have
another child and wonder what the risk is that he or she will also have this form of
dwarfism. The risk is - Answer -the same as for any other child in the population.
Mutations are more likely to occur in repeated DNA sequences because - Answer -
bases in the strand can form base pairs, generating loops that interfere with replication
and repair enzymes.
A mutation that changes the third position in a CUU codon to a C would - Answer -have
no effect on the protein.
A point mutation alters - Answer -a single base
Epigenetic changes - Answer -pass from one cell generation to the next but do not alter
the DNA sequence.
Many patients who have a certain blood clotting disorder in which the blood clots too
readily have a mutation in the promoter of a gene. This mutation most likely - Answer -
increases the transcription rate of a particular clotting factor gene.
Chromatin remodeling can act as an on/off switch for __________, while microRNA
binding can block __________. - Answer -transcription; translation
The main limitation of a drug that treats disease by altering chromatin remodeling is that
- Answer -it would change the expression of many other genes.
Histone proteins - Answer -control gene expression through chemical interactions that
expose parts of the DNA to transcription factors, while shielding other parts.
Which metaphors correctly compare chromatin remodeling and microRNA function? -
Answer -An on/off switch and a dimmer switch
Multiple proteins can be produced from a single gene by - Answer -alternative splicing
A mutation is - Answer -a change in a DNA sequence.
A germline mutation passes from generation to generation because it occurs during the
DNA replication before - Answer -meiosis
A chemical or physical agent that causes mutations is called a - Answer -mutagen
A man and woman of normal height have a son with achondroplasia. They want to have
another child and wonder what the risk is that he or she will also have this form of
dwarfism. The risk is - Answer -the same as for any other child in the population.
Mutations are more likely to occur in repeated DNA sequences because - Answer -
bases in the strand can form base pairs, generating loops that interfere with replication
and repair enzymes.
A mutation that changes the third position in a CUU codon to a C would - Answer -have
no effect on the protein.
A point mutation alters - Answer -a single base
