Cellular respiration is the process by which cells release energy from glucose using oxygen, producing carbon dioxide, water, and ATP. It includes glycolysis, the Krebs cycle, and the electron transport chain. Aerobic and anaerobic respiration provide ene

This presentation focuses on grade 11 cellular respiration.

1. Cellular Respiration
Grade 11
Life sciences
Tihelo 222209976

2. Learning obectives
Define cellular respiration in words and as a chemical
equation.
Explain the importance of cellular respiration.
State the types and stages cellular respiration.
Describe the types and stages of cellular respiration.
Compare aerobic and anaerobic respiration.
Discuss how anaerobic respiration is used in our culture.
Explain how cellular respiration can be beneficial to
industries.

3. https://www.mentimeter.com/app/presentation/altxkvn1zkjtjy7b5rfx2uz311bqrbn6/edit?
source=share-invite-modal
What is cellular respiration, and which organelle is involved ?
Code 41253305

4. Cellular respiration
process by which organic compounds (glucose) are broken down
in a cell using oxygen to release carbon dioxide, water and energy
that is stored in adenosine triphosphate (ATP molecule). (Scrivin,
2016).
This energy is then used by the cells to perform activities.
But what could be this “activities”????

5. Importance of cellular respiration

According to Blaza (2016), it provides ATP energy for,
Movement
Protein synthesis
Active transport
msibisiyabonga691 (2024), adds that it,
plays a role in carbon cycle
supports important metabolic pathway in the cell.

6. Chemical equation for cellular respiration:

Figure 1

7. In South Africa coal is used to produce
electricity.
Analogy:
Mitochondrion = Eskom
Cell = Limpopo province
Glucose = Coal
ATP = Electricity used to power homes,
businesses, and industries
Cellular respiration process = Power
generation process

Let’s use this analogy to explain cellular respiration.
Figure 2

8. Please remember this was just an
analogy. What did we say cellular
respiration is in Life sciences?
NB

9. Repurposed from Scrivin (2016)

10. 1.Aerobic respiration
requires oxygen to break
down food (Blaza, 2016).
It consists of:
1. Glycolysis (Cytoplasm)
Process whereby glucose is
broken down to form pyruvic
acid.
Glucose is broken down
To form 2 molecules of
pyruvic acid
Releasing energized
hydrogen and ATP. (Blaza,
2016)Glucose (6C)
Pyruvic acid (3C) Pyruvic acid
(3C)
ATP H
+

11. 2. Kreb cycle (Mitochondrion)
the complete breakdown of pyruvic
acid to form co2 and energy rich
hydrogen atoms (Sana, 2023). This is
when

pyruvic acid from Glycolysis
Is used in series of cyclic
reactions
To release energy rich hydrogen
atoms
and carbon dioxide (Sana 2023)
Pyruvic acid
Kreb cycle
H-atoms
CO 2
H-atoms
CO 2
H-atoms
H-atoms
CO 2

12. 3. Oxidative Phosphorylation
Energised hydrogen atoms from glycolysis and Kreb cycle
Are used to form ATP
The hydrogen atoms combine with oxygen to form water

13. Example
Figure 3

14. Anaerobic respiration (Cytoplasm)
No oxygen is required.
Produces less ATP than aerobic because not
all the glucose is broken down (Pickerington
High School Central, 2014).
In animals (lactic acid fermentation)
Occurs in muscles during exercise.
Glycolysis occurs to produce lactic acid in
small ATP energy.
The lactic acid tires the muscles.
When the muscles receive oxygen, lactic acid
becomes pyruvic acid(Blza, 2016).

Glucose
Small ATP
energy
Lactic acid

15. Example : During an exercise
Exercise
More lactic
acid produced
Tired of
lactic acid
More oxygen
inhaled
Lactic acid is
changed into
pyruvic acid
Body energised

Figure 6
Figure 5
Figure 4 Figure 7

16. In plants ( alcohol fermentation).
Nacuna (2019), defines this is an
anaerobic process that partially
breaks down glucose to produce
alcohol and carbon dioxide. Firstly,
glycolysis occurs to release pyruvic
acid and small ATP energy.
Pyruvic acid is then broken
down to form alcohol (ethanol),
releasing carbon dioxide (Sana,
2023)
Glucose
Small ATP energy
CO
2
Alcohol (ethanol) +

17. Example : Using yeast to make dough
Glucose undergoing
Glycolysis
Glucose Fermentation
producing CO2 and
alcohol
Respiration stops
(heat kills yeast)
Ethanol
evaporates
Figure 10
Figure 1
Figure 9
Figure 8
Figure 11

18. How do we use anaerobic respiration in our different cultures?
Umqombothi
Mahewu
Ting
Amasi
Figure 14
Figure 15
Figure 13
Figure 12

19. From the discussions,
what do you think are the similarities and
differences between aerobic and anaerobic
respiration

20. Similarities
Glucose is the raw material in each process
Energy is released.
CO is released.
2

21. Lets recap on differences

22. Alcohol fermentation Lactic acid fermentation
Wine
Beer
Bread
Yogurt
Cheese
Use of fermentation in industries

23. The end
Questions ????

24. REFERENCES Blaza, J. (2016). Cellular respiration [Presentation]. Scribd. https://www.scribd.com/presentation/328391499/Cellular-Respiration
msibisiyabonga691. (2024). Cellular respiration notes summary for G11 [Document]. Scribd. https://www.scribd.com/document/788695305/Cellular-
Respiration-notes-summary-for-G11
Nacuna, J. (2019). Lesson 21 cellular respiration [Presentation]. Scribd. https://www.scribd.com/presentation/436596936/Lesson-21-Cellular-Respiration
Pickerington High School Central. (2014). 8.2 cellular respiration 2014 [Slideshow]. SlideShare. https://www.slideshare.net/slideshow/82-cellular-respiration-
2014-41321181/41321181
Sana, E. E. (2023). Cellular respiration lecture ko [Presentation]. Scribd. https://www.scribd.com/presentation/621202824/Cellular-Respiration-lecture-ko
Scrivin, G. (2016). 2016 cellular respiration and photosynthesis [Slideshow]. SlideShare. https://www.slideshare.net/slideshow/2016-cellular-respiration-and-
photosynthesis/58267660
Click on images for reference.