Most cells spend the majority of their lives in _____
a. prophase
b. metaphase
c. anaphase
d. telophase
e. interphase
f. prophase and anaphase
E
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During DNA replication, DNA ligase is most active on the lagging strand. Why?
a. The lagging strands contain more short DNA segments than the leading strand, and these short segments are joined together by DNA ligase. b. The lagging strand is synthesized more slowly, and DNA ligase speeds up the DNA polymerase. c. The lagging strand synthesizes DNA in the 3' ? 5' direction. d. The lagging strand requires DNA ligase to couple the RNA primer to the Okazaki fragments. e. The lagging strand has no RNA primase activity; it is replaced by DNA ligase.
The hematocrit measures the relative ability of an individual to fight off infection.
a. true b. false
Nearly half of the human genome is composed of a noncoding DNA that can move from one chromosomal location to another. This type of noncoding DNA is/are called
A. introns. B. pseudogenes. C. microRNA genes. D. transposons. E. tandem clusters.
Which of the following organisms is not an osteichthyan?
a. Bird b. Shark c. Cod d. Coelacanth e. Human