Cellular respiration is the process by which cells generate energy by breaking down glucose and harvesting energy in the form of ATP. It involves three main stages: glycolysis, the Krebs cycle, and the electron transport chain. Glycolysis breaks down glucose into pyruvate, generating a small amount of ATP. The Krebs cycle then oxidizes pyruvate and generates more ATP and reduced cofactors. Finally, the electron transport chain uses oxygen to oxidize the reduced cofactors, generating the most ATP through oxidative phosphorylation. Cellular respiration is essential for all organisms to convert the chemical energy in food into energy their cells can use.

1. CELLULAR
RESPIRATION,GLYCOLYSIS
AND KREBS CYCLE
PRESENTED BY GROUP 6

2. WHAT IS CELLULAR RESPIRATION?
•All heterotrophic organism
including man,depend directly or
indirectly on plants and other
photosynthetic organims for food.
•Organism need food as the main
source of energy,all organism need
energy to perform life process

3. WHAT IS CELLULAR RESPIRATION?
• The food must be digested to simple form such as glucose, amino
acids, and triglycerides.
• These are then transported to the cells. The immediate energy
source of the cells is glucose.
• Glucose inside the cell is broken down to release the stored energy, this
stored energy is harvest in the form of adenosine triphosphate ATP is a
high energy molecule needed by woking cells.

4. WHAT IS GLYCOLYSIS?
• In glycosis the 6-carbon sugar, glucose, is
broken down into two molecules of a 3-
carbon molleculed called pyruvate.
• This change is accompaniment by a net gain
of 2 atp molecules and 2 NADH molecules

5. WHAT IS KREBS CYCLE?
•The krebs cycle occurs in the
mitochondrial matrix and generates a
pool of chemical energy ( ATP, NADH,
FADH2 ) from the oxidation of
pyruvate, the end product of glycolysis..

8. Essential raw materials for photosynthesis are -
carbon dioxide: it is a gas which is released into atmosphere during respiration.
Water: it is another requirement for photosynthesis which is transported upward
through xylem tissue to the leaves, from where it reaches photosynthetic cells.
Chlorophyll: it is green pigment in plants which act as catalyst. It is responsible for
absorption of sun's light by the plant. The chlorophyll pigments are photoreceptor
molecules which play a key role in the photosynthesis process.
Light: light effects photosynthesis with its intensity, duration and quality. In green
light the rate of photosynthesis is minimum, while in red or blue light the rate of
photosynthesis is maximum.

9. Related
What are the 2 products of photosynthesis?
Photosynthesis is the process by which green plants make their own food in the presence of sunlight and
chlorophyll.
Carbon dioxide + Water → Glucose + Oxygen
According to the equation above, Glucose and Oxygen are the 2 products of photosynthesis.
They are responsible for supporting life on earth and hence Photosynthesis becomes the most important
biochemical process on the planet.

10. Photosynthesis is a process by which phototrophs
convert light energy into chemical energy, which is
later used to fuel cellular activities. The chemical
energy is stored in the form of sugars, which are
created from water and carbon dioxide.

11. In aerobic respiration, there are three specific
processes, which are glycolysis, Krebs cycle and
electron transport chain (oxidative phosphorylation). In
this process, the glucose is converted to pyruvate
during glycolysis and the same pyruvate produces
carbon dioxide and water, along with the generation of
energy. ​

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