A phage that is part of a bacterial chromosome is said to be
a. self-replicating.
b. immune.
c. conjugating.
d. lysogenic.
e. virulent.
Ans: d
You might also like to view...
Which of the following statements is TRUE of small effector molecules?
A. Small effector molecules cause a conformational change in a regulatory protein. B. Small effector molecules can prevent a repressor from binding a gene region. C. Small effector molecules regulate gene transcription. D. Small effector molecules regulate gene transcription by binding a regulatory protein. E. All of the choices are correct.
What is thought to be a consequence of the increased oxygen (O2) in the atmosphere during and after the Silurian Period?
A. Conquest of land by arthropods. B. Conquest of land by arthropods and vertebrates. C. Increases in animal body sizes and conquest of land by plants. D. Conquest of land by arthropods and vertebrates, and plants. E. Conquest of land by arthropods and vertebrates and an increase in animal body sizes.
Why are most infants with phenylketonuria usually healthy at birth?
a. The defect causing the condition has usually been repaired by that time. b. The mother breaks down phenylalanine for both herself and her fetus. c. The infant can produce sufficient quantities of the enzymes needed by birth. d. Phenylalanine can be completely excreted in infants. e. Phenylalanine is completely metabolized in infants
Alteration of histones by addition of methyl and acetyl groups to particular amino acids
A) changes B-DNA to Z-DNA. B) results in the remodeling of chromatin that can activate or inhibit gene expression. C) creates G bands seen after Giemsa staining of chromosomes. D) helps preserve telomeres during DNA replication. E) alters the denaturation and renaturation of DNA.