During DNA replication the 3' to 5' exonuclease activity of DNA polymerases I and III is required for?
a. polymerization of new DNA strands
b. joining of Okazaki fragments following removal of RNA primers
c. removal of RNA primers
d. proofreading of mistakes made during DNA synthesis
Ans: d. proofreading of mistakes made during DNA synthesis
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What structure do bacteria use during conjugation?
a. pili b. flagella c. ribosomes d. plasma membrane e. no bacterial structure; it relies on viral transfer
The nervous tissue in the central nervous system that consists of neuron cell bodies and dendrites and the synapses is the
A. white matter. B. white corpuscles. C. gray matter. D. red corpuscles. E. red matter.
At the start of the breeding season, male stickleback fish undergo a number of significant changes
Their bellies become bright red and they become aggressive toward other males of the species, establishing and defending territories in which they build their nests. Although most male-male encounters consist solely of the resident lunging at an intruder, if this fails to drive off the intruder, the resident may bite. Females choose to mate with males that have large territories and well-constructed nests. What would you expect to happen as nest sites become scarcer? A) The incidence of biting and other aggressive behaviors will increase. B) Females will begin to choose mates that have no territories. C) The color of the males will fade. D) Nest construction will deteriorate. E) Males will make their territories even larger.
This property of a microscope is defined as the minimum distance two points can be apart and still be distinguished as two separate points.
What will be an ideal response?