AP BIOLOGY

PHOTOSYNTHESIS

THE CHLOROPLAST

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the main purpose of the light reactions?
A
To provide the energy and electrons for the calvin cycle
B
To capture energy and make sugar
C
To reflect green light
D
To make sugars
Explanation: 

Detailed explanation-1: -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.

Detailed explanation-2: -The electron transfers of the light reactions provide the energy for the synthesis of two compounds vital to the dark reactions: NADPH and ATP. The previous section explained how noncyclic electron flow results in the reduction of NADP+ to NADPH.

Detailed explanation-3: -The primary function of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy (ATP and NADPH) will be used by the Calvin cycle (light independent reaction) to fuel the assembly of sugar molecules.

Detailed explanation-4: -What transports electrons from the light reactions to the Calvin cycle? NADPH is an electron carrier that picks up electrons in the light reactions and releases them in the Calvin cycle.

There is 1 question to complete.