Type ________ hypersensitivity involves delayed, cell-mediated immune reactions.
A. I
B. II
C. IV
D. III
Answer: C
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If a plant is bending towards the light, one would expect which enzymes to have increased in activity?
A. auxins B. gibberellins C. wall-loosening enzymes D. ethylene E. None of these is correct
Why do the boreal forests see so little growth of smaller plant life on the forest floor?
a. They have a very short growth season and it is too cold the whole year for plants to grow. b. The conifer trees block out the light making the forest floor too dark for plant life to survive. c. Conifers do not drop their needles as often as leaved trees, and the needles decompose slowly so the soil is poor in nitrogen from lack of decomposed matter. d. There is not enough rainfall to support anything other than the trees in the boreal forest.
Base pairing
a. occurs between identical bases. b. requires hydrogen bonds. c. takes place between sugars and phosphates on the two strands in a helix. d. explains the X-ray results from Rosalind Franklin. e. occurs between A and C.
In the pUC plasmids, a polylinker region that includes multiple restriction sites is embedded in the lacZ component. If a sequence of interest is inserted into this region, what is the effect on lacZ?
What will be an ideal response?