Herpes and other enveloped viruses enter their host cells ____.
A. through pores
B. by dissolving the host plasma membrane
C. by fusion of the viral membrane with the cell’s plasma membrane
D. by activating transport proteins in the host cell’s plasma membrane
E. by engulfing the host cell
Answer: C
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Skeletal muscles are attached to bones by cords of connective tissue called tendons
Indicate whether the statement is true or false.
Which of the following is released by cells lining blood vessels and causes a decrease in blood
pressure? a. histamine b. acetylcholine c. cyclic AMP d. nitric oxide e. prostaglandin
Primase is the enzyme responsible for:a
unwinding the DNA double strand to allow DNA polymerase access to the template DNA. b. introducing nicks into the DNA double strand in order to prevent the formation of knots. c. hydrolyzing ATP to facilitate DNA unwinding. d. making short strands of RNA at the site of replication initiation. e. forming a replication fork in the DNA double helix.
How many different termination codons are used in translation?
A. Three B. Two C. One D. Four