The human genome comprises:
A) a homologous pair of chromosomes.
B) 23 chromosomes.
C) 46 pairs of chromosomes.
D) 2 X chromosomes.
E) 23 pairs of chromosomes.
E) 23 pairs of chromosomes.
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The phase of mitosis in which the nuclear envelope breaks into small pieces is
A. D, which is anaphase. B. B, which is prometaphase. C. B, which is prophase. D. C, which is metaphase. E. C, which is telophase.
What invention about 11,000 years ago led to a
boom in the human population?
a. the wheel b. agriculture c. the printing press d. the steam engine e. all of these
The gene that codes for the repressor protein of the E. coli lactose operon is:
a. located between the operator and the promoter. b. downstream from the promoter region. c. downstream from the operator. d. constitutive. e. turned off most of the time.
A complete enzyme that consists of a protein component and a nonprotein component is called a(n) ________.
A. multienzyme B. holoenzyme C. heteroenzyme D. apoenzyme