Pages in this set

Page 1

Preview of page 1
PHOTOSYNTHESIS ESSAY QUESTIONS - PLANS
1. LIGHT HARVESTING AND PHOTOSYNTHETIC PIGMENTS
Light needed to provide energy for photophosphorylation of ADP and Pi to ATP in
light dependent stage
Photosynthetic pigments found in thylakoid membranes of chloroplasts in
mesophyll cells (mainly) and guard cells
Accessory pigments e.g chlorophyll b, carotenoid such…

Page 2

Preview of page 2
2. FACTORS AFFECTING RATE OF PHOTOSYNTHESIS
Limiting factors are conditions that prevent the rate of photosynthesis from further
increasing
Compensation point is when the carbon dioxide produced during respiration is
completely used during photosynthesis
Photosynthometers used to calculate the rate of photosynthesis by measuring the
volume of oxygen produced over…

Page 3

Preview of page 3
Temperature affects the rate of photosynthesis by limiting action of enzymes such
as RuBP carboxylase and ATP synthetase
o Too low and the molecules have less kinetic energy so the number of
substrate collisions with the active site decreases therefore fewer
enzyme-substrate complexes are formed and less product is formed…

Page 4

Preview of page 4
4. NON-CYCLIC LIGHT DEPEDENENT STAGE
In thylakoids of chloroplasts
Photophosphosylation of ADP and Pi to ATP
Photolysis of water to 2e-`s, 2H+'s and ½ O2
NADP is reduced by 2H+'s from photolysis of water and 2e-`s from light hitting PSI
Also known as Z-scheme
Light absorbed by PSII and passed…

Page 5

Preview of page 5
7. LIGHT INDEPENDENT STAGE
Also known as Calvin Cycle
Uses ATP and reduced NADP made in the light dependent stage
Carbon dioxide combines with ribulose bisphosphate (RuBP) using enzyme RuBP
carboxylase as a catalyst
Product of unstable 6C compound formed, which decomposes into 2x 3C molecules
of glycerate 3-phosphate (GP)…

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »