Lectures 6-11

Lectures 6-11 - LECTURE #6 Respiration: C6H12O6 + 6O2 6CO2...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Respiration: C6H12O6 + 6O2 Photosynthesis (cellular respiration in reverse): 6 CO2 + 12 H2O + Light energy C6H12O6 + 6 O2 + 6 H2O -water is split and oxidized -carbon dioxide is reduced (gains e-) Photosynthesis consists of two processes: -Light Reactions -occur in grana -split water, release oxygen -form NADPH (NADP + 2e- + 2H+ NADPH + H+) -make ATP by chemiosmosis -Calvin Cycle / “dark reactions” (carbon fixation, reduction, and regeneration) -occurs in stroma -forms sugar from CO2, using ATP for energy and NADPH for reducing power. The colors of objects we see are actually the color that is reflected, absorbing every other color but the one that is seen. -plants reflect green light, absorb red and purple. Noncyclic Electron Flow : primary pathway of energy transformation in light reactions -produces NADPH, ATP, and O2 Cyclic Electron Flow : (under certain conditions) photoexcited e-‘s take alternative path. -short-circuit -no NADPH or O2 made -yes ATP Photosynthesis vs. Respiration: • both make and consume ATP • both make ATP using proton motive force and ATP synthase • both regulated by product levels (ATP, NADPH) • both use redox reactions, electron transport chains • one’s reactants is another’s products, and vice-versa LECTURE #8 Animal and plant cells have Intercellular junctions that directly connect the cytoplasm of adjacent cells -plants plasmadesmata (channels/bridges that perforate plant cell walls -animals (extracellular matrix ECM) tight junctions (gaskets), desmosomes (rivets), gap junctions (communications) Phospholipids are amphipathic, with hydrophilic heads and hydrophobic tails -organisms living in colder habitats have more unsaturated hydrocarbon tails w/ kinks -organisms living in warmer habitats have more saturated hydrocarbon tails Cholesterol has different effects on membrane fluidity at different temperatures (acts as “temp. buffer”)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course BILD 1 taught by Professor Boulanger during the Winter '08 term at UCSD.

Page1 / 4

Lectures 6-11 - LECTURE #6 Respiration: C6H12O6 + 6O2 6CO2...

This preview shows document pages 1 - 2. Sign up to view the full document.

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