In the base excision repair mechanism which type of bond must first be cleaved?
A) an N-C' a-glycosidic bond
B) an N-C' b-glycosidic bond
C) a P-O3' bond
D) a P-O5' bond
B
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Explain why clouds form in rising air. Would it be possible for rising air to remain cloud-free?
What will be an ideal response?
Ultramafic lava flows are significant in the Archean rock record because they indicate that Earth
was 90 percent molten. Indicate whether the statement is true or false.
Strong storms that develop over water, poleward of the polar front, are called?
a. ?nor'easters. b. ?upslope lows. c. ?lee-side lows. d. ?polar lows. e. ?tropical lows.
Tuvalu, Kiribati, and the Marshall Islands are already experiencing disastrous flooding related to global climate change. What has been the response of the people on these islands?
A) They have built polders patterned after those found in the Netherlands. B) The islands have banded together into a strong political union lobbying for a global solution to climate change. C) All three have instituted a policy of transmigration, encouraging citizens to move to the center of their island countries. D) Scientists on these islands have worked together to build a highly advanced sea wall. E) They have done nothing.