Study Guides (248,516)
Canada (121,604)
Biology (174)
BI110 (62)

Chapter 7 Photosynthesis.docx

4 Pages
42 Views
Unlock Document

Department
Biology
Course
BI110
Professor
Matthew Smith
Semester
Fall

Description
Chapter 7: Photosynthesis  Photosynthetic organisms: convert sunlight energy into chemical energy o Use energy to assemble complex organic molecules from inorganic raw materials  The organic molecules are then used as energy sources (but also used by energy source by other organisms)  Two part of photosynthesis o Calvin Cycle  Products from light reactions are converted to organic molecules o Light dependant reactions  Products: high energy electron carriers and ATP  These molecules are then used to drive the calvin cycle  Oxygenic photosynthesis: Water is the source of energy of the calvin cycle  Anoxygenic photosynthesis: first type of photosynthesis  Photosynthesis takes place on thylakoid in chloroplast in the mesophyll cell  Plastids are present in all plant cells o Chloroplasts o Chromoplasts o Amyloplasts  Plastid types are interconvertible o Depending on the tissue and environmental conditions, they are able to develop into other plastid type  Plasticity of Plastids o Varies in size, shape, content and function o Ex of plasticity of shape: chloroplasts send out tubular extensions called stromules, that serve to increase the SA and connect other plastids together  cpDNA: chloroplast genome contains around 120 genes o encodes proteins involved in photosynthesis of expression of chloroplast genes o multiple copies per organelle  Pigments: after excitation, one of three events occurs: o e- returens to ground state and energy is emitted (as heat or fluorescent light) o e- returns to ground state and energy transfers to another pigment (inductive resonance) o excited e- transferred to an accept  photoreduction  pigment molecule can become oxidized  Chlorophyll and carotenoids o Chlorophyll a: oxidized and donates e- to primary e- acceptor o Chlorophyll b and carotenoids are accessory pigments  Donates excitation energy to chlorophyll a via inductive resonance  Absorption spectra & action spectrum  Photosystems: where pigment molecules are located o Antenna complex: absorbs light energy and transfers it to chlorophyll a via inductive resonance o Reaction center: pair of specialized chlorophyll a molecules bound by proteins (P700 in PSI, P680 in PS11) and it is also a primary e- acceptor o Special chloroph
More Less

Related notes for BI110

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit