Protein filaments with a diameter of 4-7 nm that play a role in cell movement and shape change are called ________.
A. microtubules
B. microfilaments
C. intermediate filaments
D. mycelia
Answer: B
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When a DNA molecule is replicated, the daughter molecules contain one strand of parental DNA and one strand of newly synthesized DNA; this is called ________ replication.
A. conservative B. semiconservative C. dispersive D. hemiconservative
Where does crossing over occur in meiosis?
a. prophase I b. metaphase I c. anaphase I d. telophase I
Transcription of DNA
a. results in formation of a complementary strand of RNA. b. produces two new strands of DNA. c. occurs on the surface of the ribosome. d. is semiconservative.
The contractile activity of smooth muscle cells within which type of blood vessel is primarily involved in the control of the organ blood flow and mean arterial pressure?
A) veins B) capillaries C) arterioles D) venules E) arteries