CBSE Class 11 Biology Worksheet Set F Solved

1. In the electron transport chain how many molecules of ATP are formed by oxidation of NADH and FADH₂?

2. What are the products of Fermentation in yeast and some anaerobic bacteria? 

3. What is the hydrogen donor in photosynthesis of Purple and green sulphur bacteria? 

4. In what way are the accessory pigments protecting chlorophyll a? 

5. What is Respiratory Quotient? What is its significance? 

6. Mention the molecules formed in steps of formation of two Pyruvic acid molecules from Glyceraldehyde 3 Phosphate.

7. State following two differences between C ₃ and C ₄ plants

(i)Site of C ₃ cycle and
(ii)Enzymes that help

8. What is the difference between cyclic and Non-cyclic Photo-phosphorylation. 

9. What is the law of limiting factors? Mention the factors affecting the rate of photosynthesis. 

10. Explain the Calvin Cycle with a diagrammatic representation. 

11. Explain the Citric Acid cycle.

VALUE POINTS 

1. One NADH gives 3 molecules of ATP and One FADH₂ gives 2 ATP 

2. Incomplete oxidation of yeast gives CO₂ and Ethanol and anaerobic bacteria produce lactic acid

3. H₂ S 

4. Accessory pigments protect chlorophyll ‘a’ from photo oxidation 

5. R.Q is the ratio of volume of CO₂ released to the volume of O₂ taken up in respiration. Value of R.Q indicates the nature of the substrate.

6. Glyceraldehyde3 Phosphate(3C)
2(1.3.Phosphoglyceric acid)
2x(3 phosphoglyceric acid)
2x (2 Phosphoglycerate)
2 x Phosphoenol Pyruvate
2xPyruvic acid

7. In C₃ plants the site of C₃ cycle is the mesophyll cells but In C₄ plants the C₃ cycle, is in the bundle sheath cells. In C₃ plants it’s the enzyme RuBisCo, In C₄ plants it is PEPcase & RuBisCO

8. 1.Cyclic is related to PS I , In Noncyclic PS II & then PS I
2.Cyclic produces one ATP ,Non cyclic produces NADH2, ATP & O₂
3.Cyclic does not have Photolysis of water but Non cyclic water splitting
4.Cyclic the electron is circulated in the system in non cyclic electron is

9. If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value.( It is the factor which directly affects the process if its quantity is changed). Light,CO₂,Te.mperature , Water

10.

11. TCA cycle or Citric acid cycle begins with condensation of Acetyl CoA and Oxalo Acetic acid catalysed by citrate synthase forming Citric Acid.
Citrate is the isomerised to Isocitrate.
Then decarboxylation leads to formation of α ketoglutaric acid releasing one NADH ₂ and CO₂ and then Succinyl Co A. is formed again releasing NADH ₂ and CO₂
This is then converts to Succinic acid and a molecule of GTP is formed. The succinic acid is then converted to Malic acid releasing FADH ₂ and finally back to Oxaloacetic acid .

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