The linear DNA fragments taken up from disrupted infective cells recombine with the chromosomal
DNA of the noninfective cells by ____, much in the same way as genetic recombination takes place in
conjugation.
a. meiosis
b. metaphase II
c. nuclear division
d. double crossovers
e. transformation
D
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The increase in cytosolic calcium within the egg during fertilization initiates
A. the slow block to polyspermy. B. the cortical reaction. C. signaling for the first cell division. D. the release of enzymes by the egg. E. All of the choices are correct.
When scientists placed ATP Synthase linked to fluorescent actin on a microscope slide and added ATP, the actin could be seen spinning. If the scientists instead added ADP what would happen?
A. The actin would spin because ADP can also move through the channel in ATP synthase. B. The actin would not spin because it required ATP hydrolysis. C. The actin would not spin because only ATP can move through the channel in ATP synthase. D. The actin would spin when ADP is phosphorylated to form ATP.
The DNA sequence recognized by restriction endonucleases is generally how long?
a. 1?2 nucleotides b. 4?8 nucleotides c. 10?15 nucleotides d. 24?32 nucleotides e. 36?47 nucleotides
The spontaneous ending of a pregnancy that results in the premature expulsion of the embryo is termed a(n) ________
Fill in the blank(s) with correct word