Which of the following is mostly performed by bacteria living within the roots of plants in the legume family?
a. nitrification
b. ammonification
c. nitrogen cycling
d. nitrogen fixation
e. nitrogen assimilation
ANSWER: d
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If you were to completely digest this fragment of DNA with PstI, how many pieces of DNA would you obtain?
A 6.85 kb EcoRI fragment of DNA is shown below. The location of several restriction sites is indicated. Scale is approximate.
A. 1
B. 2
C. 3
D. 4
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about restriction enzymes?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Atrioventricular valves separate:
A. the left atrium from the left ventricle and the right atrium from the right ventricle. B. the right atrium from the right ventricle. C. the left atrium from the left ventricle. D. the right and left ventricles. E. the aorta from the left ventricle.
Why is transcription-coupled repair (TCR) considered particularly efficient when compared to nucleotide excision repair (NER)?
A. The exinuclease employed in TCR removes a smaller fragment containing the damage. B. TCR targets transcriptionally active regions for repair over damage in less active parts of the genome. C. It uses error-prone polymerases so it can move through damaged areas faster. D. It directly repairs the damage rather than removing and replacing the damaged strand. E. TCR requires less protein interactions.
Which is (are) the predominant second messenger(s)
involved in regulating glucose metabolism? a. insulin b. glucagon c. adenyl cyclase d. cAMP e. all of these