5.1 Photosynthesis Flashcards
1
Q
Photoionisation definition
A
Light energy excites e- to a higher energy state, giving energy
2
Q
Phosphorylation definition
A
Adding a phosphate group
3
Q
Photolysis definition
A
Light energy splitting a molecule
4
Q
Coenzyme definition
A
Molecule that aids function of enzyme
5
Q
Chemiosmosis definition
A
Moving ions across a semipermeable membrane to produce an electrochemical gradient
6
Q
Why is ATP a good energy store? (5)
A
- Small and soluble (transport)
- Easily broken ∴ instantaneous energy release
- Charged ∴ doesn’t diffuse out of cell
- Can phosphorylate other molecules by transfer of phosphate group
- Releases small energy per molecule ∴ manageable amount ∴ mitigate energy loss
7
Q
How do electron carrier proteins produce ATP?
A
- e- pass down protein in a series of oxidation-reduction reactions, each carrier is at a lower energy state than the previous and so energy is released by the e- to condense Pi and ADP
- Chemiosmosis
8
Q
What are the products of the LDR?
A
- NADPH+
- O2
- ATP
9
Q
Thylakoid structure
A
Disc like structures with thylakoid membranes with PS1 and PS2 and electron carrier proteins and ATP synthase
- Stacked in grana
10
Q
How are chloroplasts adapted for their function?
A
- Thylakoid membrane = large S.A
- Proteins in grana hold chlorophyll in place for max absorption of light
- Contain DNA and ribosomes for quick protein synthesis
11
Q
GP - TP reactants
A
2 x ATP
2 x r. NADP
12
Q
TP - RuBP reactants
A
1 x ATP
13
Q
% CO2 in air
A
0.04%
