WBBSE Class 9 Life Science MCQ Questions Chapter 3.2B Cellular Level Respiration

Well structured WBBSE Class 9 Life Science MCQ Questions Chapter 3.2B Cellular Level Respiration can serve as a valuable review tool before exams.

Cellular Level Respiration Class 9 WBBSE MCQ Questions

Multiple Choice Questions :

Question 1.
An example of anaerobic fungus, is-
(A) Chlorella
(B) Yeast
(C) Agaricus
(D) None of these
Answer:
(B) Yeast

Question 2.
Which phase of respiration directly involves atmospheric O₂ ?
(A) Glycolysis
(B) Krebs cycle
(C) Terminal respiration
(D) Krebs cycle and terminal respiration
Answer:
(C) Terminal respiration

Question 3.
Production of CO₂ occurs during-
(A) Glycolysis and Krebs cycle
(B) Terminal respiration
(C) Krebs cycle
(D) All of these
Answer:
(C) Krebs cycle

Question 4.
Which of the following is involved in anaerobic respiration?
(A) HNO₃
(B) N₂O
(C) NH₂
(D) NO₃
Answer:
(D) NO₃

Question 5.
One molecule of glucose breaks into molecules of pyruvic acid in glycolysis.
(A) 1
(B) 2
(C) 3
(D) More than 3
Answer:
(B) 2

Question 6.
EMP pathway is biochemically known as-
(A) Glycolysis
(B) Krebs cycle
(C) Terminal respiration
(D) Electromotive pressure
Answer:
(A) Glycolysis

Question 7.
The other name of terminal respiration is-
(A) EMP pathway
(B) ETS
(C) TCA cycle
(D) ATP
Answer:
(B) ETS

Question 8.
In anaerobic respiration, the terminal respiration path is
(A) Present
(B) Absent
(C) Long
(D) Short
Answer:
(D) Short

Question 9.
Terminal respiration occurs in the
(A) Inner membrane of mitochondria
(B) Cytoplasm
(C) Outer membrane of mitochondria
(D) Endoplasmic reticulum
Answer:
(A) Inner membrane of mitochondria

Question 10.
Which statement is incorrect?
(A) Krebs cycle is TCA cycle
(B) Glycolysis is known as ETS
(C) EMP path is Glycolysis path
(D) ETS is terminal respiration
Answer:
(B) Glycolysis is known as ETS

Question 11.
Which of the following is incorrect regarding respiration?
(A) Enzyme is not required during respiration
(B) Respiration occurs in living cells only
(C) Respiration occurs in the presence or absence of free oxygen
(D) None of these
Answer:
(A) Enzyme is not required during respiration

Question 12.
gram mole of glucose is equal to of glucose.
(A) 80 gm
(B) 280 gm
(C) 360 gm
(D) 180 gm
Answer:
(D) 180 gm

Question 13.
Which of the following is not a respiratory substrate?
(A) Protein
(B) Vitamin
(C) Carbohydrate
(D) Fat
Answer:
(B) Vitamin

Question 14.
The cell organelle in bacteria, where respiration occurs is
(A) Mitochondrion
(B) Chromatophore
(C) Mesosome
(D) Genophore
Answer:
(C) Mesosome

Fill in the blanks :

1. In respiration, about ___ of the free energy is entrapped in ATP as kinetic energy.
2. In aerobic respiration, 1 gram mole glucose is oxidised to liberate _____ of energy.
3. ______ respiration results in muscle fatigue.
4. The source of heat energy, which is released during combustion of coal, is ____ energy.
5. _____ is also called controlled combustion.
6. _____ is the first compound of Krebs cycle.
7. The enzyme ATP-ase is present in the _______ of mitochondria.
8. Respiration is a/an ______ reaction.
9. ______ is a fast and uncontrolled process.
10. Pyruvate is the end product of glycolysis which gets converted into _____.

Answer:

1. 40%
2. 686 kcal
3. Anaerobic
4. Solar
5. Respiration
6. Citrate
7. Oxysome
8. Exothermic
9. Combustion
10. Acetyl Co-A

State true or false :

1. ADP is popularly known as the energy currency’.
2. Respiration is a physico-chemical reaction.
3. Aerobic respiration occurs is presence of free molecular oxygen.
4. By complete oxidation, one mole of glucose generates 586 kcal heat.
5. Methanobacterium sp. is an anaerobic bacterium.
6. Fermentation occurs in yeast.
7. Bacteria named Lactobacillus lactis produce ethanol by the process of fermentation.
8. ATP are gained directly from glycolysis.
9. Krebs cycle occurs both in cytoplasm and mitochondria.
10. The reaction path of terminal transpiration is known as ETS.

Answer:

1. False
2. False
3. True
4. False
5. True
6. True
7. False
8. True
9. False
10. True

Match the columns :

Question 1.

Left column	Right column
1. Energy currency	A. Combustion
2. Bio-chemical reaction	B. Fermentation
3. Physico-chemical process	C. Breathing
4. Oxygen-free process	D. Respiration
	E. ATP

Answer:

Left column	Right column
1. Energy currency	E. ATP
2. Bio-chemical reaction	D. Respiration
3. Physico-chemical process	A. Combustion
4. Oxygen-free process	B. Fermentation

Question 2.

Left column	Right column
1. Lactic acid fermentation	A. 50 kcal / mole
2. Aerobic respiration	B. 36 kcal / mole
3. Acetic acid fermentation	C. 686 kcal / mole
4. Anaerobic respiration	D. 116 kcal / mole
	E. 300 kcal / mole

Answer:

Left column	Right column
1. Lactic acid fermentation	B. 36 kcal / mole
2. Aerobic respiration	C. 686 kcal / mole
3. Acetic acid fermentation	D. 116 kcal / mole
4. Anaerobic respiration	A. 50 kcal / mole

Question 3.

Left column	Right column
1. Site of glycolysis	A. TCA cycle
2. Other name of Krebs cycle	B. Mitochondria
3. Other name of glycolysis	C. Cytoplasm
4. Site of Krebs cycle	D. Plastid
	E. EMP Pathway

Answer:

Left column	Right column
1. Site of glycolysis	C. Cytoplasm
2. Other name of Krebs cycle	A. TCA cycle
3. Other name of glycolysis	E. EMP Pathway
4. Site of Krebs cycle	B. Mitochondria

Question 4.

Left column	Right column
1. End product of glycolysis	A. Ethanol, Lactic acid
2. By-product of Krebs cycle	B. Glucose
3. End product of fermentation	C. NADH2, FADH2
4. End product of anaerobic respiration	D. Pyruvate
	E. Inorganic compounds

Answer:

Left column	Right column
1. End product of glycolysis	D. Pyruvate
2. By-product of Krebs cycle	C. NADH2, FADH2
3. End product of fermentation	A. Ethanol, Lactic acid
4. End product of anaerobic respiration	E. Inorganic compounds