Which of the following is NOT a reason for the high fidelity of the newly synthesized DNA molecule?
A. The hydrogen bonding between purines and pyrimidines is stable.
B. The DNA polymerase is unlikely to form bonds between nucleotides if they are mismatched.
C. The DNA polymerase has exonuclease functions.
D. The DNA polymerase has the ability to change the structure of the base in order to form the correct bond
D
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Control systems in the cell can induce cell suicide, or apoptosis, in cells with excessive DNA damage
a. True b. False Indicate whether the statement is true or false
The Belding's ground squirrel giving off an alarm signal in the picture above would most commonly be:
a) a oldest male in the colony to which he migrated. b) an older female in the colony in which she was born. c) an older female in the colony to which she migrated. d) a male in the colony in which he was born. e) a younger female in the colony in which she was born.
Classification.Respond to the following statements in reference to the four kinds of social behavior listed below.
A. When the offspring of one brood of Florida scrub-jays help their parents in taking care of their siblings in the next brood, this is an example of __________. B. When a woman raises her brother's children, this is an example of __________. C. When a clump of sawfly caterpillars rear up, writhe, and regurgitate toxic fluid after being disturbed, this is an example of __________. D. When two or more female lions attack a wildebeest together, this is an example of __________. E. When a colony of bluegill sunfishes competes for the safe sites at the center of the group, this is an example of __________. F.
Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is ________ and Z is ________
A) a base; a buffer B) an acid; a base C) a base; a strong acid D) an acid; a buffer E) a buffer; a base