2. DESCRIPTION OF CELLULAR
RESPIRATION
The
process that synthesis energy (ATP) using
food and oxygen.
C H O + O → H O + ATP
6
12
6
2
2
(glucose)
Therefore
water and carbon dioxide is saved
as byproducts.
Cellular respiration is the opposite of
photosynthesis.
3. What type of cell undergoes cellular
respiration?
All
living organisms undergo cellular
respiration to produce energy.
Some organisms consume plants to obtain
food for cellular respiration e.g. herbivores.
Other organisms ingest other organisms e.g.
predators.
4. Cellular respiration in plant or animal
cells.
Cellular
respiration occur in the mitochondria
of plant and animal cells
Mitochondria is consist of two double unit
membrane (outer and inner) which is made
up of cristae.
Therefore it is found in the cytoplasm of
most cells.
The outer membrane is oval and the inner
membrane is folded.
6. Co- enzymes used during respiration
1. NAD+ → is a co – enzymes and
electron accepter. It accept 2
electrons and a hydrogen ion and form
NADH.
NADH can also give of electrons and
hydrogen ions to form NAD+ again.
2. FAD → is a co – enzyme and
electron accepter. It accept 2
electrons and 2 hydrogen ions to form
FADH .
2
7. Phases of cellular respiration
Glycolysis
→ take place in cytoplasm and no
oxygen is needed for this stage(anaerobic).
Form glucose phosphate, a 6c compound.
Kreb cycle/ citric acid cycle → takes place in the
mitochondrion and needs oxygen(aerobic). It
forms 2c compound (acetyl – group), acetyl
co – enzyme A (2c), citric acid (6c) and oxalic
acid.
Hydrogen transfer system/ oxidative phosphorylation
→ takes place in the mitochondrial
membrane and need oxygen(aerobic). It uses
NAD+ to form NADH and ADP to form ATP.
