DNA gyrase
A. closes gaps between DNA bases.
B. removes supercoiling ahead of origin.
C. synthesizes RNA primers.
D. copies DNA bases.
Answer: B
You might also like to view...
Which substances are reabsorbed in the proximal convoluted tubule?
A. K+ ions B. Na+ ions C. HCO3- ions D. glucose E. All of the choices for this question are correct.
In plants, meiosis results in
a. haploid spores. b. haploid gametes. c. diploid spores. d. diploid gametes. e. more than one of these
The phospholipid molecules of most membranes
have a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. none of these.
A plant lacking this macronutrient is likely to be deficient in which step of root nodule development?
A. phosphorus; development of infection threads B. phosphorus; curling of root hairs around rhizobia C. calcium; flavonoid release D. calcium; curling of root hairs around rhizobia