1. Without using notes, draw what you
recall of the Link Reaction and Krebs
Cycle – this is not a test, I just want
to see how much you remember
(Hints are available if/when you get stuck)

2. Oxidative Phosphorylation and
Chemiosmosis
(o) outline the process of oxidative phosphorylation, with reference to
the roles of electron carriers, oxygen and the mitochondrial cristae;
(p) outline the process of chemiosmosis, with reference to the electron
transport chain, proton gradients and ATPsynthase
(q) state that oxygen is the final electron acceptor in aerobic
respiration;

3. Oxidative Phosphorylation and
Chemiosmosis
CHEMIOSMOSIS: A proton gradient is
generated using energy released from
electrons as they pass through electron
carriers in the Electron Transport Chain.

4. OXIDATIVE PHOSPHORYLATION: protons diffuse
through ATP synthase, rotating the enzyme to join
ADP and Pi to make ATP.

5. • H+ and e- released from reduced NAD (NADH)
and FAD (FADH2) from Kreb’s Cycle
• Oxygen accepts e- and H+ to form water (final
electron acceptor)

8. Summary test…
• Pyruvate molecules produced during (1) are moved
into the (2) of the mitochondria by the process of
(3). Before pyruvate can enter the Krebs cycle, it
first has a carbon dioxide molecule removed – a
process known as (4), and also a pair of hydrogen
atoms removed – a process known as (5). The
resultant molecule that can enter Krebs cycle is
called (6). This 2-carbon molecule enters the
Krebs cycle and combines with a 4-carbon molecule
called (7) to produce a 6-carbon molecule called (8).
The progressive loss of 2 carbon dioxide molecules
and 8 hydrogen atoms produces the original 4carbon molecule. Most of the hydrogen atoms are
transferred to a hydrogen carrier called (9) or (10)
and enter a process called (11) that is used to
produce (12).

9. 1. Glycolysis
2. Matrix
3. Active transport
4. Decarboxylation
5. Dehydrogenation
6. Acetyl coA
7. Oxaloacetate
8. Citrate
9. NAD
10.FAD
11.Oxidative phosphorylation
12.ATP