Which of the following enzymes allows retroviruses to transcribe DNA from ssRNA?
A. protease
B. DNA polymerase
C. integrase
D. reverse transcriptase
E. nuclease
Answer: D
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A novel disease causes destruction of the adrenal glands. If a patient with this disease failed to receive aldosterone replacement therapy, what would result?
A. death B. diminished cognitive function C. infertility in both men and women D. poor blood sugar regulation Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about aldosterone? What other information is related to the question? Choose Answer Given what you now know, what information 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?
It is thought that viruses may have originated from cells because ____
a. of their small size b. they are pathogens c. they can only replicate within a host cell d. they do not have organelles e. of their genetic material
The bone marrow is where
A. antigen is filtered from the blood. B. antigen is filtered from tissue fluid. C. blood stem cells give rise to immature lymphocytes. D. immune responses to antigen occur. E. T-lymphocytes complete maturation.
The niche of an organism includes all of the following, except
A. position in the community structure. B. number of offspring it produces. C. nutritional intake. D. rate of population growth. E. All of the choices are included in the description of an organism's niche.