In an experiment like that of the 1952 Hershey and Chase experiments, 35S was added to a phage replicating within its bacterial host
The new phage particles were carefully isolated and used to infect fresh bacterial cells in the absence of any radioisotopes. Where would you expect to find the 35S radioisotope immediately after infection?
A) in the phage ghosts outside the bacterial cells
B) incorporated into the bacterial matrix proteins
C) incorporated into the bacterial DNA
D) inside the bacterial cells, but separate from the bacterial DNA
E) inside the bacterial cells, but separate from the bacterial proteins
Answer: A
You might also like to view...
A 39-year-old woman is in her sixth week of pregnancy. Due to her advanced age, she is at higher risk for having a baby with Down's syndrome than younger pregnant women. She would like to find out as early as possible whether or not her baby has Down's syndrome. Her doctor should suggest
A. amniocentesis. B. genetic counseling. C. chorionic villi sampling. D. a pedigree analysis.
Which of the following is not a component of the mating-type switch mechanism?
A. HO nuclease B. Rad51 C. synthesis-dependent strand annealing (SDSA) D. RecA E. HML?
Much medical advice towards heart health indicates that you should eat less sodium (table salt). Notable higher risks of high sodium may include high blood pressure and damage to arteries or organs in your body. If you eat a single meal with large amounts of salt to suit your taste, which of these may result within minutes, as the sodium enters your bloodstream?
A. Your blood will become hypotonic, and water in your body tissues will flow into your arteries, inflating them. B. Your blood will become hypertonic, and water in your body tissues will flow into your arteries, inflating them. C. Simple diffusion of water and sodium will both balance in an isotonic condition between arteries and body tissues. D. You should expect no change in the concentration gradient because of a single meal, rather than lifestyle and diet. E. Your blood will become hypotonic, and water in your arteries will flow into your tissues, inflating them.
Which of the following is NOT a function associated
in some way with the human respiratory system? a. sense of smell b. speech c. blood flow in veins d. white blood cell formation e. temperature maintenance