The concentration of mitotic cyclin (M cyclin) ________________

(a) rises markedly during M phase.
(b) is activated by phosphorylation.
(c) falls toward the end of M phase as a result of ubiquitylation and degradation.
(d) is highest in G1 phase.


(c) The concentration of mitotic cyclin rises gradually during G2 and it is ubiquitylated and degraded during late M phase.

Biology & Microbiology

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The function of DNA ligase is to:

A. catalyze the formation of covalent bonds between adjacent nucleotides. B. unwind the double-stranded DNA prior to replication. C. keep the single strands of DNA apart during replication. D. facilitate base pairing between single stranded molecules of DNA. E. catalyze the formation of hydrogen bonds between adjacent nucleotides.

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Blood velocity is slowest in the

a. arteries. b. arterioles. c. capillaries. d. venules. e. veins

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This type of mechanoreceptor is found in the lips, nipples, and fingertips and helps us to precisely determine contact with something else

A) free nerve endings B) Pacinian corpuscles C) Meissner's corpuscles D) hair root plexus

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Which two hepatitis viruses are generally acquired in a similar manner?

A. HBV and HBC B. HBA and HBV C. HBA and HBC D. None of the viruses are acquired in the same manner.

Biology & Microbiology