What occurs during a lysogenic infection?
A. Viral particles attach to but do not penetrate a host cell.
B. Viral particles fill a host cell and cause it to burst.
C. Viral genetic material replicates in a host cell but does not cause symptoms.
D. The viral prophage DNA is packaged into a protein coat.
Ans: C. Viral genetic material replicates in a host cell but does not cause symptoms.
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The lacP site lies within the lac operon and is upstream of the genes that encode for proteins involved in lactose uptake and metabolism. Which of the following statements is TRUE of the lacP site?
A. It is the lac promoter site. B. It is where RNA polymerase binds. C. It is the site where genes are transcribed that encode proteins for metabolizing lactose. D. It is the lac promoter site where RNA polymerase binds. E. It is the lac promoter site, where genes are transcribed that encode proteins for metabolizing lactose.
A process that is part of the cell cycle and parcels out the duplicated copies of genetic material for cell division in eukaryotes is called ________
A) nucleosome B) meiosis C) histone D) mitosis
Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the
A. CAM cycle. B. citric acid cycle. C. carbon cycle. D. Calvin cycle. E. Krebs cycle.
In the distal convoluted tubule and collecting duct
A. sodium and chloride ions are actively reabsorbed. B. water moves out by osmosis when ADH is present. C. potassium ions are secreted. D. all of these events occur. E. none of these events occur in distal convoluted tubules, which are always impermeable to solutes and water.