Which of the following proteins is required only for excision of phage lambda from a bacterial chromosome?
a. Cre
b. Int
c. IHF
d. Xis
e. Att
Ans: d
Biology & Microbiology
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How is complementary base pairing different when pairing DNA to DNA than when pairing DNA to mRNA?
What will be an ideal response?
Biology & Microbiology
The secretion of __________ is an important homeostatic mechanism involved in maintaining normal
heart rhythm. a. hydrogen ions b. potassium c. water d. glucose e. urea
Biology & Microbiology
Which of the following scientists discovered penicillin?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
Biology & Microbiology
The feeding habits of lampreys are best
described as a. suspension feeding. b. predatory. c. parasitic. d. scavenging. e. all of these.
Biology & Microbiology