PYQ Vault

Biology · Textbook solutions

Respiration and Energy Transfer

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 28 questions

Exercise

28 q

Q1. Choose correct option

Practice · 3
  1. Choose correct option
    Ex Q1(A)
    The reactions of the TCA cycle occur in

    Tap an option to check your answer.

  2. Ex Q1(B)
    In eucaryotes the complete oxidation of a molecule of glucose results in the net gain of

    Tap an option to check your answer.

  3. Ex Q1(C)
    Which step of Krebs cycle operates substrate-level phosphorylation?

    Tap an option to check your answer.

Q2. Fill in the blanks with suitable words

Practice · 5
  1. Fill in the blanks with suitable words
    Ex Q2(A)
    Acetyl CoA is formed from ................. and co-enzyme A.
  2. Ex Q2(B)
    In the prokaryotes ................. molecules of ATP are formed per molecule of glucose oxidised.
  3. Ex Q2(C)
    Glycolysis takes place in .................
  4. Ex Q2(D)
    F1\text{F}_1- F0\text{F}_0 particles participate in the synthesis of .................
  5. Ex Q2(E)
    During glycolysis .................. molecules of NADH+H+\text{NADH}+\text{H}^+ are formed.

Q3. Answer the following questions

Practice · 14
  1. Answer the following questions
    Ex Q3(A)
    When and where does anaerobic respiration occur in man and yeast?
  2. Ex Q3(B)
    Why is less energy produced during anaerobic respiration than in aerobic respiration?
  3. Ex Q3(C)
    Which is the site of ETS in mitochondrial respiration?
  4. Ex Q3(D)
    Which is the terminal electron acceptor in aerobic respiration?
  5. Ex Q3(E)
    What is RQ.? What is its value for fats?
  6. Ex Q3(F)
    What are respiratory substrates? Name the most common respiratory substrate.
  7. Ex Q3(G)
    Write explanatory notes on : i. Glycolysis ii. Fermentation by yeast iii. Electron transport chain
  8. Ex Q3(H)
    How are glycolysis, TCA cycle and electron transport chain linked? Explain.
  9. Ex Q3(I)
    How would you demonstrate that yeast can respire both aerobically and anaerobically?
  10. Ex Q3(J)
    What is the advantage of step wise energy release in respiration?
  11. Ex Q3(K)
    Explain ETS.
  12. Ex Q3(L)
    Discuss. "The respiratory pathway is an amphibolic pathway".
  13. Ex Q3(M)
    Why is Krebs cycle reffered as amphibolic pathway?
  14. Ex Q3(N)
    Which of the following step of aerobic respiration would be omitted when fatty acids are used as respiratory substrate?

    Tap an option to check your answer.

Q4. Compare

Practice · 2
  1. Compare
    Ex Q4(A)
    Photosynthesis and Respiration.
  2. Ex Q4(B)
    Anaerobic and Anaerobic respiration.

Q5. Differentiate between

Practice · 3
  1. Differentiate between
    Ex Q5(A)
    Respiration and combustion
  2. Ex Q5(B)
    Glycolysis and Krebs cycle
  3. Ex Q5(C)
    Aerobic respiration and fermentation

Q6. Identify the cycle given below

Practice · 1
  1. Ex Q6
    Identify the cycle given below. Correct it and fill in the blanks and write discription of it in your own words A cyclic pathway diagram with ten numbered steps. At the top, CoA-SH enters and NAD+\text{NAD}^+ → NADH+H+\text{NADH}+\text{H}^+ and CO2\text{CO}_2 leave on the arrow to 'Acetyl-CoA'. Every intermediate of the cycle is an empty oval. The enzymes are printed: Citrate synthase, Aconitase, Aconitase, Isocitrate Dehydrogenase (twice), α-Ketoglutarate dehydrogenase complex, Succinyl-CoA synthetase, Succinate dehydrogenase, Fumarase, Malate dehydrogenase. The step labels are printed as ① Condensation, ② Dehydration, ③ Dehydration, ⑥ Oxidative decarboxylation, ⑨ Hydration, ⑩ Dehydrogenation; ④ has no label and ⑤, ⑦ and ⑧ are empty boxes. H2O\text{H}_2\text{O}, CoA-SH, CO2\text{CO}_2, GDP (ADP) + Pi\text{P}_\text{i} and GTP (ATP) are printed at their steps, and arrows from the dehydrogenase steps lead to two further empty boxes (one in the centre, one beside the succinate step).