Cyclin-dependent kinase (Cdk) is _____
A) inactive, or "turned off," in the presence of cyclin
B) present only during the S phase of the cell cycle
C) an enzyme that removes hydroxyl groups from growth hormones
D) the enzyme that catalyzes the attachment of chromosomes to microtubules
E) an enzyme that attaches phosphate groups to other proteins
Answer: E
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If fertilization involves two gametes that contain different alleles of a given gene, the resulting offspring is
A. dihybrid. B. haploid. C. heterozygous. D. homozygous. E. polygenic.
In mammals, males are ________ and females are ____________.
A. heterozygous, homozygous B. hemizygous, homozygous C. homozygous, heterozygous D. hemizygous, heterozygous E. heterozygous, hemizygous
In order to transfer gene a to an F- cell, the sex pilus must be in place for at least ____ minutes
a. 0 b. 6 c. 10 d. 14 e. 25
Pathogens spread by
a. direct contact. b. indirect contact. c. inhalation. d. contact with a vector. e. all of these