As DNA replication proceeds the double helix ahead of the replication fork becomes highly coiled and twisted. The enzyme that uncoils the helix ahead of the replication fork is called?
a. helicase
b. gyrase
c. DNA polymerase
d. primase
Ans: b. gyrase
You might also like to view...
Ambiguously worded answer choices _____.
Fill in the blank(s) with the appropriate word(s).
The tuft of fenestrated capillaries at which filtration takes place in the mammalian kidney is referred to as the
A. glomerulus. B. Bowman's capsule. C. renal corpuscle. D. proximal convoluted tubule. E. collecting duct.
When pressure in the lungs falls below atmospheric pressure, ____
a. oxygen leaves the blood b. oxygen enters the blood c. air exits the lungs d. air flows into the lungs e. lung volume decreases
A drug designed to inhibit the response of cells to testosterone would almost certainly result in which of the following?
A) lower cytoplasmic levels of cAMP B) an increase in receptor tyrosine kinase activity C) a decrease in transcriptional activity of certain genes D) an increase in cytosolic calcium concentration E) a decrease in G protein activity