The natural role of restriction enzymes in bacteria is to
A) make conjugation more efficient.
B) allow transposons to move to another place in the chromosome.
C) protect the cell from invading phages.
D) allow cells to accept foreign DNA.
E) provide the cell with new phenotypes, such as antibiotic resistance.
C
Bloom's Taxonomy: Comprehension
Section: The Tools of Recombinant DNA Technology
Learning Outcome: 8.9
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Which of the following is nottrue of the first step of translational elongation in bacteria?
A. GTP-bound EF-Tu interacts with the tRNA acylated with the next amino acid to be added. B. The function of EF-Ts is to exchange the GDP bound by EF-Tu with GTP. C. EF-Tu hydrolyzes GTP after dissociation from the aminoacyl-tRNA bound in the A site. D. Correct codon-anticodon interactions are proofread when the EF-Tu dissociates through a process called accommodation.
What is thought to be the reason of breaching? a. To communicate an individual's arrival
b. All of these choices. c. To show dominance. d. To signal a departure from a group.
The home range of an animal is always defended
Indicate whether the statement is true or false
As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are
A) isometric contractions. B) tetanic contractions. C) isotonic contractions. D) tendon-mediated contractions. E) ligament-mediated contractions.