If Cro were to bind OR3 before cI bound OR1 and OR2, the phage:
A. would enter lysogeny.
B. would continue through the lytic pathway.
C. would increase expression of cI.
D. DNA would be targeted by the exonuclease cII.
B
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Urticaria is characterized by
A. living in Utica. B. wheal and flare. C. asthma. D. inflammation.
Phospholipase is an enzyme that cleaves the phosphate head group off a phospholipid molecule. The plasma membrane is not, however, permeable to the enzyme. Imagine a cell where phospholipid A is present in the layer of phospholipids facing the exterior of the cell, and phospholipid B is present in the layer of phospholipids facing the interior of the cell. After adding phospholipase to the medium in which the cell is growing, what would you expect to find in the fluid surrounding the cell?
a. phosphate head groups from neither phospholipids A nor B b. phosphate head groups from both phospholipids A and B c. the phosphate head group from phospholipid B only d. the phosphate head group from phospholipid A only
The two domains composed of only unicellular organisms are
a. eubacteria and archaea b. eukarya and bacteria c. archaea and bacteria d. archaea and eukarya
An aquifer that may contribute some surface water is a/an ________ aquifer
Fill in the blank(s) with correct word