Anandan.08_lecture

Anandan.08_lecture - BIO 122 Dr. Shivanthi Anandan Anandan...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 122 Dr. Shivanthi Anandan 1 Anandan Bio 122 Fall 2010
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Photosynthesis Light energy is captured and used to synthesize carbohydrates CO 2 + H 2 O + light energy → C 6 H 12 O 6 + O 2 + H 2 O CO 2 is reduced H 2 O is oxidized Energy from light drives this endergonic reaction 2 Anandan Bio 122 Fall 2010
Background image of page 2
Photosynthesis powers the biosphere Regions on the surface of the Earth and in the atmosphere where living organisms exist Largely driven by the photosynthetic power of green plants Cycle where cells use organic molecules for energy and plants replenish those molecules using photosynthesis Plants also produce oxygen 3 Anandan Bio 122 Fall 2010
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Trophic levels Heterotroph Must eat food, organic molecules from their environment, to sustain life Autotroph Make organic molecules from inorganic sources Photoautotroph Use light as a source of energy Green plants, algae, cyanobacteria 4 Anandan Bio 122 Fall 2010
Background image of page 4
5 Anandan Bio 122 Fall 2010
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chloroplast Organelles in plants and algae that carry out photosynthesis Chlorophyll- green pigment Majority of photosynthesis occurs in leaves in mesophyll in plants Stomata- carbon dioxide enters and oxygen exits leaf 6 Anandan Bio 122 Fall 2010
Background image of page 6
7 Anandan Bio 122 Fall 2010
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chloroplast anatomy Outer and inner membrane Intermembrane space 3 rd membrane - thylakoid membrane contains pigment molecules Forms thylakoids Enclose thylakoid lumen Granum- stack of thylakoids Stroma- fluid filled region between thylakoid membrane and inner membrane 8 Anandan Bio 122 Fall 2010
Background image of page 8
2 stages of photosynthesis Light reactions Uses light energy Take place in thylakoid membranes Produce ATP, NADPH and O 2 Calvin cycle Occurs in stroma Uses ATP and NADPH to incorporate CO 2 into organic molecules 9 Anandan Bio 122 Fall 2010
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Anandan Bio 122 Fall 2010
Background image of page 10
Light energy Type of electromagnetic radiation Travels as waves Short to long wavelengths Also behaves as particles- photons Shorter wavelengths have more energy 11 Anandan Bio 122 Fall 2010
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12 Anandan Bio 122 Fall 2010
Background image of page 12
Photosynthetic pigments absorb some light energy and reflect others Leaves are green because they reflect green wavelengths Absorption boosts electrons to higher
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/22/2010 for the course BIO 122 taught by Professor Anandan during the Fall '08 term at Drexel.

Page1 / 46

Anandan.08_lecture - BIO 122 Dr. Shivanthi Anandan Anandan...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online