Biology, 29.08.2020 21:01, halfpint1168
In the glycolytic pathway, glucose 6-phosphate. a six-carbon sugar, IS isomerized to fructose 6-phosphate. Two steps after the isomerization reaction, the six-carbon Sugar is cleaved to form two three-carbon sugars. Choose the statements that describe why the isomerization reaction is critical for the subsequent cleavage reaction that results in formation Of two three-carbon sugars in the glycolytic pathway?a. The carbon of a carbonyl group has a partial positive charge and can delocalize electrons to facilitate cleavage of the C-C bond. Without the isomerization reaction, C-1 will be the carbonyl carbon and the C— C cleavage will occur between C-2 and C-3. b. Breaking a bond is energetically unfavorable and can only proceed if a functional group with electronegative atoms is adjacent to the cleavage site to stabilize the reaction intermediates. c. To cleave a bond, a nucleophilic carbon attacks the adjacent electrophilic carbon. The isomerization reaction moves the carbonyl group to C-2, thus making it a nucleophile that can attack C-3 to generate two three-carbon sugars. d. The partial positive charge on the carbonyl carbon can stabilize the carbon radicals formed by the homolytic cleavage Of the C— C bond in the six-carbon sugar. Since the cleavage occurs between C-3 and C-4 Of the six-carbon sugar, the carbonyl group needs to be on C-2. e. Cleavage of a C—C bond in the six-carbon sugar occurs via a decarboxylation reaction that requires a carbonyl group adjacent to cleavage site to stabilize the carbanion intermediate.
Answers: 1
Biology, 22.06.2019 02:40, maisieisdabomb23
How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.
Answers: 1
Biology, 22.06.2019 22:30, rn2be1980
4.explain how these geological processes and interactions have changed earth's surface through the years. be sure to use evidence to support your answer • earthquakes • faults • ocean formation • mountains • volcanoes • island chains • seafloor spreading
Answers: 3
In the glycolytic pathway, glucose 6-phosphate. a six-carbon sugar, IS isomerized to fructose 6-phos...
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