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.
D
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Which of the following can describe the phospholipid bilayer?
a. a homogenous solution b. a heterogenous solution c. fluid mosaic d. homogenous mosaic
The protists are a diverse group of organisms that have traditionally been grouped together because
they all
a. have the same type of nutrition. b. live in the same environments. c. have very similar DNA sequences. d. have very similar shapes. e. are not prokaryotes, fungi, plants, or animals.
An RNA molecule is typically _____ ; a DNA molecule is typically _____
a. single-stranded; double-stranded b. double-stranded; single-stranded c. both are single-stranded d. both are double-stranded
When mast cells degranulate and release histamine, which of the following events may occur?
A) constriction of small blood vessels B) bronchial spasms C) increased mucus production D) both constriction of small blood vessels and bronchial spasms E) both bronchial spasms and increased mucus production