Photosynthesis Chemistry Worksheet With Answer Key (Page 4 of 4) in pdf

Photosynthesis Chemistry Worksheet With Answer Key Page 4

Name

Answer Key

Date:

Period:

10. Identify the two products of the light-dependent reactions which are carried through to the

light- independent reactions.

NADPH

ATP

11. In the space below, draw a diagram to explain the cycle of reactions that occur in the light-

independent stages of photosynthesis. Include carboxylation of RuBP to glycerate-3-phosphate

by rubisco, reduction to triose phosphate, formation of glucose phosphate and reformation of

RuBP.

RuBP and CO

are combined through the process of carbon fixation using the enzyme rubisco. This forms

a 6 carbon intermediate that is immediately broken down into two molecules of glycerate-3-phosphate.

Glycerate-3-phosphate is then phosphorylated and reduced using ATP and NADPH (from the light

independent reactions) into glyceraldehyde-3-phosphate (G3P/triose phosphate). G3P will then either

leave the cycle and become a molecule of glucose, or be recycled into RuBP. 5 molecules of G3P will be

used to regenerate 3 molecules of RuBP using ATP from the light dependent reactions. 1 molecule of

G3P will leave and become glucose when it combines with another molecule of G3P.

Photosynthesis Chemistry Worksheet With Answer Key Page 4