AP BIOLOGY

PHOTOSYNTHESIS

THE CALVIN CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Calvin cycle is sometimes called the light-independent reactions because
A
light is not required for the Calvin cycle to move forward
B
light is required
C
it is something animal cells do
D
green light is absorbed during this step
Explanation: 

Detailed explanation-1: -These reactions are also called the light-independent reactions because they are not directly driven by light. In the Calvin cycle, carbon atoms from CO2start text, C, O, end text, start subscript, 2, end subscript are fixed (incorporated into organic molecules) and used to build three-carbon sugars.

Detailed explanation-2: -The light-independent reaction uses the electrons from the light-dependent reactions to energize the process, particularly during the conversion of inorganic compounds into organic compounds, such as carbohydrates. They do not require light or energy from the sun to initiate the reaction.

Detailed explanation-3: -Though it is called the “dark reaction", the Calvin cycle does not actually occur in the dark or during night time. This is because the process requires NADPH, which is short-lived and comes from the light-dependent reactions.

Detailed explanation-4: -The overall purpose of the light-dependent reactions is to convert solar energy into chemical energy in the form of NADPH and ATP. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules.

There is 1 question to complete.