BI111 Chapter Notes - Chapter 1: Bacteriorhodopsin, Phytochrome, Chemical Energy

36 views11 pages
Published on 17 Apr 2013
School
WLU
Department
Biology
Course
BI111
Professor
A Green Algea
Using light for both energy and information
Eyespot: light sensor
The Sun
The reason there is life on earth
Electromagnetic Spectrum
Ranges from gamma rays to radio waves; visible light and the
wavelengths used for photosynthesis occupy a narrow band of
the spectrum
The longer the wavelength, the lower the energy of the
photons it contains. The shorter the wavelength the higher
the energy of the photons it contains
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in
What is Light?
Definition of light: Electromagnetic radiation that humans can
detect with their eyes
A wave of discrete particles called photons
Wavelength: Distance between two successive peaks
To be used, light energy must be absorbed by molecules
called pigments
Light Interacting With Matter
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in
Pigment Structure
Conjugated system
Alternating double/single carbon bonds
Delocalization of e-
Photosynthesis ->
Vision ->
Red photosynthetic algea ->
Absorption of Light by
Chlorophyll
Colour is the result of
wavelengths of light that are not absorbed by a pigment
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Using light for both energy and information. The reason there is life on earth. Ranges from gamma rays to radio waves; visible light and the wavelengths used for photosynthesis occupy a narrow band of the spectrum. The longer the wavelength, the lower the energy of the photons it contains. The shorter the wavelength the higher the energy of the photons it contains. Definition of light: electromagnetic radiation that humans can detect with their eyes. A wave of discrete particles called photons. To be used, light energy must be absorbed by molecules called pigments. Colour is the result of wavelengths of light that are not absorbed by a pigment. Thrive in salt water habitats that are lethal to most other forms of life. Species of halobacterium contain a pigment-protein complex called bacteriorhodopsin, which functions as a proton pump. The pigment component of bacteriorhodopsin captures photons of light that provide energy supply needed to pump protons out of the cell.

Get OneClass Grade+

Unlimited access to all notes and study guides.

YearlyMost Popular
75% OFF
$9.98/m
Monthly
$39.98/m
Single doc
$39.98

or

You will be charged $119.76 upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.