Question

Complete the following sentence. A ______________ mutation in a receptor codon would not prevent its normal function. a-Silent mutation b-Missense mutation c-Nonsense mutation d-Deletion 2. From the following statements, choose the most likely effect of deleting two nucleotides in a codon at a receptor binding site? a-The reading frame would be changed, producing a non-functional receptor. b-Changing an amino acid in the binding site will cause the ligand to no longer be compatible with the receptor. c-There will be no change; the receptor will bind the ligand. d-The receptor will bind another ligand instead. 3. The mutation of a gene encoding a transcription factor occurs in a fat cell. The synthesis of several proteins linked to lipid metabolism is reduced. Which of the following best explains what happened in controlling the expression of these proteins? a-The mRNA must be polycistronic to allow coordinated expression of genes. b-Proteins linked to fat metabolism were labeled with ubiquitin and then degraded by lysosomes. c-Proteins linked to fat metabolism are encoded by the same mRNA. d-The coordinated expression of these proteins is controlled by the mutated transcription factor.

          Complete the following sentence. A ______________ mutation in a receptor codon would not prevent its normal function.
a-Silent mutation
b-Missense mutation
c-Nonsense mutation
d-Deletion

2. From the following statements, choose the most likely effect of deleting two nucleotides in a codon at a receptor binding site?
a-The reading frame would be changed, producing a non-functional receptor.
b-Changing an amino acid in the binding site will cause the ligand to no longer be compatible with the receptor.
c-There will be no change; the receptor will bind the ligand.
d-The receptor will bind another ligand instead.

3. The mutation of a gene encoding a transcription factor occurs in a fat cell. The synthesis of several proteins linked to lipid metabolism is reduced. Which of the following best explains what happened in controlling the expression of these proteins?
a-The mRNA must be polycistronic to allow coordinated expression of genes.
b-Proteins linked to fat metabolism were labeled with ubiquitin and then degraded by lysosomes.
c-Proteins linked to fat metabolism are encoded by the same mRNA.
d-The coordinated expression of these proteins is controlled by the mutated transcription factor.

Added by Kara L.

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