The DNA sequence recognized by restriction endonucleases is generally ____ base pairs long
a. 1-2
b. 4-8
c. 10-15
d. 24-32
e. 36-47
ANSWER: b
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Which list correctly describes the sequence of events that occurs during cell division, beginning at interphase?
a. nuclear division, DNA replication, cytoplasmic division b. DNA replication, cytoplasmic division, nuclear division c. cytoplasmic division, nuclear division, DNA replication d. nuclear division, cytoplasmic division, DNA replication e. DNA replication, nuclear division, cytoplasmic division
cDNA
a. does not contain introns. b. is produced from mRNA. c. production utilizes reverse transcriptase. d. begins as a hybrid molecule with an mRNA. e. fits all of these descriptions
Phenotypic sex is determined at the moment of fertilization
a. True b. False
Infections generally result in an increase in the number of
a. leukocytes b. are the largest cells in the blood c. promote clotting d. do not have a nucleus