Which of the following plant hormones stimulates the ripening of fruit and inhibits plant growth?
A. abscisic acid
B. ethylene
C. cytokinin
D. auxin
E. gibberellin
Answer: B
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You are a physician, and you suspect your patient has a viral infection that has never been seen in humans. The infection is localized in the cells along the lining of the small intestine
The cells in this area are regularly sloughed off and replaced with new cells; that is, these cells are constantly dividing. When you isolate this new virus and incubate it in culture, you discover that it does not replicate well in cultures that have slowly dividing cells, but it does much more damage in cultures that have actively dividing cells. What do these findings suggest about this new virus? A) It is a double-stranded RNA virus. B) It is a negative-sense, single-stranded RNA virus. C) It is a double-stranded DNA virus. D) It is a single-stranded DNA virus.
Which of the following is NOT part of the male reproductive parts of a flower?
A. anthers B. microspores C. pollen D. sperm cells E. ovule
The Ti plasmid is used to ____
a. create clones of mammals b. treat human diseases by somatic gene therapy c. insert transgenes into bacteria d. insert transgenes into plants e. insert transgenes into animals
Which of the following is a possible location for a bacterial adhesion?
A) fimbriae, flagella, and pili B) pili C) flagella D) fimbriae