The amount of enzyme activity in a cell that is homozygous for a mutant allele is 400 units. The amount of enzyme activity in a cell homozygous for the WT allele is 200 units. The amount of enzyme activity in a heterozygote is 300 units
What is the dominance relationship between the WT and mutant allele for the phenotype of amount of enzyme per cell? A) The WT allele is dominant.
B) The mutant allele is dominant.
C) The WT and mutant alleles are codominant.
D) The WT and mutant alleles show incomplete dominance.
E) It is impossible to determine from the information given.
D
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Which of the following is not true about the termination of replication in bacteria?
A. Termination occurs at sequences called Ter sites. B. Binding of Tus proteins to Ter sites blocks the advance of the replication fork by interacting with DnaB helicase. C. There are two clusters of Ter sites oriented in opposite directions. D. Tus-Ter complex activity is polar; the replication forks can pass through the first set but are blocked by the second. E. Replication forks can proceed past both Tus-Ter clusters, which causes problems when it runs into RNA polymerase head first.
A gene that produces a protein used in more than one biochemical pathway, or other trait, is a(n) gene.
A. dominant B. recessive C. pleiotropic D. codominant E. incomplete dominant
Which of the following diseases is NOT caused by viruses?
A. the common cold and influenza B. smallpox and mononucleosis C. polio and rabies D. AIDS and warts E. diabetes
Hyperventilation will cause changes inPCO2 that are detected by the chemoreceptors which causes a(n)
A) decrease in breathing rate only. B) increase in breathing rate and depth of breathing. C) decrease in breathing rate and depth of breathing. D) increase in breathing rate only. E) increase in depth of breathing only.