Hydrogen bonds play a major role in____
A. primary structure of protein
B. alpha-helical structure of protein
C. formation of disulfide bridges
D. formation of double helix structure
E. protein function
A. A, B, D, and E
B. All of these
C. A and B
D. A and C
E. B, D, and E
Ans: E. B, D, and E
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At the molecular level, the "choice" between lytic and lysogenic pathways is determined by:
A. the positive regulatory effects of a large number of bacteriophage proteins produced soon after infection. B. the negative regulatory effects of a large number of bacteriophage proteins produced soon after infection. C. the positive regulatory effects of a small number of bacteriophage proteins produced soon after infection. D. the negative regulatory effects of a small number of bacteriophage proteins produced soon after infection. E. the positive and negative regulatory effects of a small number of bacteriophage proteins produced soon after infection.
Negative mycobacterial cultures are reported final and the cultures are discarded after what period?
a. 7 days b. 2 weeks c. 4 weeks d. 8 weeks
Which of the following is a cure for people with recurrent infection from Clostridium difficile?
A) Renal transplantation B) Genetic restructuring C) Grafting D) Fecal transplantation
Sympatric speciation is the most common method of speciation and accounts for almost all evolution
of new animal species. Indicate whether the statement is true or false.