Which of the following is a possible outcome of the lysogenic cycle?
A) prophage formation
B) prophage formation and propagation
C) bacterial cell lysis
D) bacterial cell lysis, prophage formation and propagation, and bacterial fission are all possible outcomes of the lysogenic cycle
E) bacterial fission
Answer: D
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These are the only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart.
A. Mammals B. Amphibians C. Birds D. Fishes E. Reptiles
A given enzyme
a. can be used for many different kinds of chemical reactions. b. is permanently changed during a chemical reaction. c. has a special site where the products bind before the reaction begins. d. increases the rate of a particular reaction.
The albumin fraction of serum separated by electrophoresis will contain most of the antibodies.
Answer the following statement true (T) or false (F)
For the lac operon in E. coli, under conditions in which glucose is absent and lactose is present, which of the following is true?
a. CRP and cAMP together are bound to the DNA, and LacI is bound to the operator site. b. The lac operon is not transcribed because lactose is present. c. CRP and cAMP together are bound to the DNA, and allolactose is bound to LacI. d. The lac operon is not transcribed due to catabolite repression because glucose is absent.