AP BIOLOGY

PHOTOSYNTHESIS

THE CALVIN CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does carbon combine with to form glucose?
A
NADPH
B
ATP
C
RuBP
D
G3P
Explanation: 

Detailed explanation-1: -The most common pathway combines one molecule of CO2 with a 5-carbon sugar called ribulose biphosphate (RuBP). The enzyme which catalyzes this reaction (nicknamed RuBisCo) is the most abundant enzyme on earth!

Detailed explanation-2: -Water and carbon dioxide combine to form glucose and oxygen in the process of photosynthesis.

Detailed explanation-3: -An enzyme, RuBisCO, catalyzes the fixation reaction, by combining CO2 with RuBP.

Detailed explanation-4: -In the Calvin-Benson cycle, RuBP is a product of the phosphorylation of ribulose-5-phosphate (produced by glyceraldehyde 3-phosphate) by ATP.

Detailed explanation-5: -RuBP stands for ribulose bisphosphate, it’s a 5 carbon compound involved in the Calvin cycle, which is part of the light-independent reactions of photosynthesis. Atmospheric CO2 is combined with RuBP to form a 6 carbon compound, with the help of an enzyme (biological catalyst) called RuBisCo.

There is 1 question to complete.