Which of the following mutagens is most different than the others in terms of its effect on DNA?
A. Base analogue
B. Planar mutagen that inserts between stacked bases
C. Acridine orange
D. Intercalating agent
Answer: A
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What percentage of water is reabsorbed by the proximal convoluted tubule by the time the filtrate leaves?
A. 75% B. 0% C. 10% D. 25% E. 50%
The total DNA in a cell is referred to as the:a
genome. b. cDNA. c. library. d. chromosomal DNA. e. Human Genome project
In comparing aerobic and anaerobic cellular respiration, how much more effective is aerobic cellular respiration in net energy release?
A. 18 times (36 ATP:2 ATP) B. 20 times (40 ATP:2 ATP) C. 2 times (4 ATP:2 ATP) D. 17 times (34 ATP:2 ATP)
All of the following are true about Shiga toxins EXCEPT:
A. It is a holotoxin composed from one A subunit and five B subunits B. It is a preformed toxin composed from one A subunit and five B subunits C. Upon its activation, the B subunits bind to a host cell and facilitate transfer of the A subunit into the cell. The a subunit disrupt protein synthesis D. It is also produced by some pathogenic Escherichia coli