CBSE Class 11 Biology Respiration In Plants Worksheet Set A

Respiration in Plants MCQ Questions with Answers Class 11 Biology

Question- Choose the incorrect option for why plants can get along without respiratory organs as plants, unlike animals, have no specialized organs for gaseous exchange.

(1) Respiration rate is faster than animals in roots, stems and leaves

(2) O₂ released during photosynthesis is utilized for respiration

(3) Loose packing of parenchyma cells in leaves, stems and roots facilitates respiration

(4) There is very little transport of gases from one plant part to another

Answer (1)

Question- All are true about glycolysis, except

(1) Oxygen independent pathway

(2) It produces one pyruvic acid molecule from each glucose

(3) It occurs in the cytoplasm of cell

(4) It can operate by using both glucose and fructose

Answer (2)

Question- Which of the following substances can undergo oxidation and release energy?

(1) Inorganic acids

(2) Organic food

(3) Organic acid

(4) Both (2) & (3)

Answer (4)

Question- Respiration involves breaking of_______ bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy.

(1) C — C

(2) C — O

(3) C — H

(4) Both (2) & (3)

Answer (1)

Question- In floating respiration substrate used is/are

(1) Carbohydrate only

(2) Fat and carbohydrate

(3) Fat and protein

(4) Carbohydrate and protein

Answer (2)

Question- Respiration is seen in

(1) Non green cells only

(2) Non green cells in light only

(3) All living cells both during day and night

(4) All cells, except the photosynthetic cells during day

Answer (3)

Question- Those organism which cannot use oxygen for growth and are even harmed by its presence, are known as

(1) Obligate aerobes

(2) Aerotolerant anaerobes

(3) Facultative anaerobes

(4) Obligate anaerobes

Answer (4)

Question- Facultative anaerobes

(1) Cannot use oxygen for growth and are even harmed by it

(2) Cannot use oxygen for growth, but tolerate the presence of it

(3) Are aerobes which can grow without oxygen

(4) Die when given aerobic condition

Answer (3)

Question- Maximum energy can be obtained from oxidation of which respiratory substrate

(1) Fat

(2) Proteins

(3) Carbohydrates

(4) Organic acid

Answer (1)

Question-  Common step of both aerobic and anaerobic respiration are

(1) EMP pathway

(2) Tricarboxylic acid cycle

(3) Acetyl CoA formation

(4) Citric acid cycle

Answer (1)

Question- The compounds that are subjected to biological oxidation are called _______ in which ______ is the most common.

(1) Respiratory substrate, carbohydrate

(2) Respiratory substance, protein

(3) Respiratory organic substances, fats

(4) Respiratory substrate, protein

Answer (1)

Question- Which of the following pathway was given by Embden, Meyerhof and Parnas?

(1) Glycolysis

(2) Acetyl CoA formation step

(3) Krebs cycle

(4) Pentose phosphate pathway

Answer (1)

Question-  Read the following statements and choose the correct option:

(1) Respiration is purely a catabolic process

(2) Reduction of food results in the release of energy

(3) Chemical energy is broken down during respiration to release energy

(4) Fungi can make their own food and derive the energy by respiration

Answer (3)

Question-  In EMP pathway, hexose sugar splits into two molecules of triose sugar by the catalytic activity of

(1) Phosphofructokinase

(2) Aldolase

(3) Dehydrogenase

(4) Transphosphorylase

Answer (2)

Question- Glycolysis occurs in

(1) All living cells

(2) Only eukaryotic cells

(3) Nerve cells

(4) Only muscle cells

Answer (1)

Question-  Interconversion of glyceraldehyde-3-phosphate and dihydroxyacetone phosphate is catalysed by which enzyme?

(1) Phosphotriose isomerase

(2) Phosphohexose isomerase

(3) Phosphoglyceromutase

(4) Triose kinase

Answer (1)

Question- Breakdown of complex molecules to yield energy takes place in

(1) Cytoplasm and mitochondria

(2) Chloroplast

(3) Cytoplasm and plastids

(4) Mitochondria and chloroplast

Answer (1)

Question- The energy releasing metabolic process in whichsubstrate is oxidised without an external electron acceptor is called 

(1) Photorespiration 

(2) Glycolysis 

(3) Fermentation 

(4) Aerobic respiration 

Answer (3)

Question- The value of RQ when the respiratory substances are poor in oxygen is 

(1) Zero 

(2) Infinity 

(3) Greater than one 

(4) Less than one 

Answer (4)

Question- Cytochromes are found in  

(1) Lysosomes 

(2) Matrix of mitochondria 

(3) Outer wall of mitochondria 

(4) Cristae of mitochondria 

Answer (4)

Question- Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?

(1) Fructose 1,6-bisphosphate 

(2) Pyruvic acid 

(3) Acetyl CoA 

(4) Glucose-6-phosphate 

Answer (3)

Question- Location of SDH enzyme of Krebs cycle in plants is 

(1) Plasma membrane 

(2) Inner mitochondrial membrane 

(3) Cytoplasm 

(4) Matrix 

Answer (2)

Question- The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:

(1) Nucleic acids 

(2) ATP in small stepwise units

(3) ATP in one large oxidation reaction 

(4) Sugars 

Answer (2)

Question-  In alcohol fermentation, _____ of energy in glycose in released and not all of it is trapped as high energy bonds of ATP.

(1) Less than 1% 

(2) More than 10% 

(3) Less than 7% 

(4) More than 40% 

Answer (3)

More Question

SECTION -A

Q1. What are the two types of respiration? Differentiate between the two.

Q2. Tabulate the differences between aerobic and anaerobic respiration.

Q3. Why does anaerobic respiration produce less energy than aerobic respiration?

Q4. What is the end product of glycolysis in aerobes, and where does this process occur? List the conditions under which fermentation occurs in plant cells.

Q5. What is respiratory quotient? What does it indicate?

SECTION-B

Q1. Name the end product of glycolysis. List two ways by which molecules of ATP are produced in glycolysis during aerobic respiration in a cell.

Q2. Write a short note on fermentation.

Q3. Does pyruvic acid enter the Krebs cycle directly?

Q4. What is the respiratory quotient when fats are used in respiration and why?

SECTION-C

Q1. Differentiate between glycolysis and Kreb’s cycle.

Q2. What is the importance of F0-F1 particles in ATP production during aerobic respiration?

Q3. How many ATP molecules are produced, per molecule of glucose, in aerobic respiration?

Q4. What is the amphibolic pathways? Explain with reference to respiratory pathway.

SECTION-D

Q1. Explain the major steps in Kreb’s cycle. Where does this process occur in a cell?

Q2. Where is electron transport system operative in mitochondria? Explain the system highlighting the role of oxygen.