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Chapter 08
Photosynthesis
BIOLOGY
Thirteenth Edition
Raven, Johnson, Mason, Losos,
Duncan
© 2023 McGraw Hill, LLC. All rights reserved. Authorized only for instructor use in the classroom.
No reproduction or further distribution permitted without the prior written consent of McGraw Hill, LLC.
, Photosynthesis Overview
Energy from the Sun is captured through the process of
photosynthesis:
6CO2 + 12H2O + Light → C6H12O6 + 6H2O + 6O2
Oxygenic photosynthesis is carried out by:
• Cyanobacteria.
• Seven groups of algae.
• All land plants – inside chloroplasts.
© McGraw Hill, LLC 2
, Stages of photosynthesis
Light-dependent reactions
• Require light.
• Require water
1. Make ATP and reduce NADP+ to NADPH
2. Produce O2
Carbon fixation reactions or light-independent reactions
• Does not require light.
3. Use ATP and NADPH to synthesize organic molecules
from CO2
© 2020 McGraw-Hill Education. 8-3
© McGraw Hill, LLC
, Chloroplasts
Thylakoid membrane – internal membrane
• Contains chlorophyll and other photosynthetic
pigments.
• Pigments clustered into photosystems.
Grana – stacks of flattened sacs of thylakoid
membrane
Stroma – semiliquid surrounding thylakoid
membranes
© McGraw Hill, LLC 4
Chapter 08
Photosynthesis
BIOLOGY
Thirteenth Edition
Raven, Johnson, Mason, Losos,
Duncan
© 2023 McGraw Hill, LLC. All rights reserved. Authorized only for instructor use in the classroom.
No reproduction or further distribution permitted without the prior written consent of McGraw Hill, LLC.
, Photosynthesis Overview
Energy from the Sun is captured through the process of
photosynthesis:
6CO2 + 12H2O + Light → C6H12O6 + 6H2O + 6O2
Oxygenic photosynthesis is carried out by:
• Cyanobacteria.
• Seven groups of algae.
• All land plants – inside chloroplasts.
© McGraw Hill, LLC 2
, Stages of photosynthesis
Light-dependent reactions
• Require light.
• Require water
1. Make ATP and reduce NADP+ to NADPH
2. Produce O2
Carbon fixation reactions or light-independent reactions
• Does not require light.
3. Use ATP and NADPH to synthesize organic molecules
from CO2
© 2020 McGraw-Hill Education. 8-3
© McGraw Hill, LLC
, Chloroplasts
Thylakoid membrane – internal membrane
• Contains chlorophyll and other photosynthetic
pigments.
• Pigments clustered into photosystems.
Grana – stacks of flattened sacs of thylakoid
membrane
Stroma – semiliquid surrounding thylakoid
membranes
© McGraw Hill, LLC 4
