Deoxyribonucleic acid is used for: (choose all that apply)
A. transmission of information.
B. storage of information.
C. biological catalysis.
D. energy storage.
E. cell-to-cell communication.
Answer A,B
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Which of the following is true about the enzyme telomerase?
a. It can re-establish telomere length. b. It is found only in adult cells. c. It is responsible for telomere shortening. d. It may speed up the aging process. e. It is expressed at low levels in cancer cells.
A(n) ______ is any biological agent that is capable of destroying red blood cells and causing the release of hemoglobin.
Fill in the blank(s) with the appropriate word(s).
How are immune cells able to detect foreign pathogens?
A) They detect foreign, unfamiliar chemical substances released by the invading cells. B) They are able to detect structures on the surfaces of foreign cells that are not found in the host. C) They can compare the DNA sequences from the foreign cells to host DNA.
What could decrease the passage of oxygen into the blood vessels?