The total compaction of DNA as seen in metaphase chromosomes is approximately ________-fold.
A) 10,000
B) 50,000
C) 100,000
D) 40
A) 10,000
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The receptors that detect head rotation ____
a. are located in the cochlea b. are located in the utricle c. are found at the base of each semicircular canal d. respond best to straight line acceleration e. are contained in an air-filled space
A population genetic study of a certain insect revealed four alleles for the GPI (glucose-phosphate isomerase) locus. How many different genotypic classes should be found?
A) 4 B) 8 C) 10 D) 16 E) 20
Several enzymes that fit the same substrate are
A. the same as the substrate. B. not able to function. C. in competition for the same substrate. D. able to interact and form one complex of enzymes.
What do you predict would happen if you replace the Lac operator DNA from the Lac operon with the DNA from the operator region from the tryptophan operon?
(a) The presence of lactose will not cause allosteric changes to the Lac repressor. (b) The Lac operon will not be transcribed when tryptophan levels are high. (c) The lack of glucose will no longer allow CAP binding to the DNA. (d) RNA polymerase will only bind to the Lac promoter when lactose is present.