Course
Genetics
Study Pack
Set 9 Proteins And Their Synthesis
Question 1
(Multiple Choice)
Free
In Neurospora,a linear biochemical pathway synthesizes an amino acid Z.E1,E2,and E3 are enzymes that catalyze the three reactions. 
Null mutants for the enzyme E2 gene will grow on minimal medium supplemented with compounds:
Null mutants for the enzyme E2 gene will grow on minimal medium supplemented with compounds:A)W or X.
B)Y or Z.
C)W or X or Y or Z.
D)Z only.
E)W only.
Answer
Question 2
(Multiple Choice)
Free
Two gametes,each carrying a mutant recessive allele for a different gene/enzyme in the adenine biosynthetic pathway,come together to form a diploid embryo.The individual derived from this embryo will display a:
A)lethal phenotype in media lacking adenine supplementation.
B)wild-type phenotype,capable of synthesizing adenine.
C)a weak adenine requirement for survival (intermediate phenotype).
D)a profound defect in adenine synthesis as two enzymes are missing.
E)embryonic lethality.
Answer
Question 3
(Multiple Choice)
Free
DNA probes are often synthesized based on knowledge of the protein produced by a gene.What might be a potential problem of synthesizing DNA probes in this manner?
A)The deduced DNA probe would be missing introns associated with prokaryotic genes.
B)Because codons in DNA are redundant,knowing which codon to assign an amino acid may be difficult.
C)The deduced DNA probe would be missing introns associated with eukaryotic genes.
D)Because codons in DNA are redundant,knowing which codon to assign an amino acid may be difficult,as well as the deduced DNA probe would be missing introns associated with eukaryotic genes.
E)None of the answer options are correct.
Answer