NEET Biology Respiration In Plants MCQs Set A

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MCQ for Full Syllabus Biology Respiration In Plants

Full Syllabus Biology students should refer to the following multiple-choice questions with answers for Respiration In Plants in Full Syllabus. These MCQ questions with answers for Full Syllabus Biology will come in exams and help you to score good marks

Respiration In Plants MCQ Questions Full Syllabus Biology with Answers

 

 

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

  • a) Cytoplasm and mitochondria
  • b) Cytoplasm and plastids
  • c) Chloroplast
  • d) Mitochondria and chloroplast

Answer: Cytoplasm and mitochondria

 

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

  • a) C — C
  • b) C — O
  • c) C — H
  • d) None of these

Answer: C — C

 

Question: Read the following statements and choose the correct option

  • a) Chemical energy is broken down during respiration to release energy
  • b) Fungi can make their own food and derive the energy by respiration
  • c) Reduction of food results in the release of energy
  • d) Respiration is purely a catabolic process

Answer: Chemical energy is broken down during respiration to release energy

 

Question:  Respiration is seen in

  • a) All living cells both during day and night
  • b) Non green cells in light only
  • c) Non green cells only
  • d) All cells, except the photosynthetic cells during day

Answer: All living cells both during day and night

 

Question:  The compounds that are subjected to biological oxidation are called _______ in which ______ is the mostcommon

  • a) Respiratory substrate, carbohydrate
  • b) Respiratory organic substances, fats
  • c) Respiratory substance, protein
  • d) Respiratory substrate, protein

Answer:  Respiratory substrate, carbohydrate

 

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

  • a) Both
  • b) Organic acid
  • c) Organic food
  • d) None of these

Answer: Both

 

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

  • a) Respiration rate is faster than animals in roots, stems and leaves
  • b) Loose packing of parenchyma cells in leaves, stems and roots facilitates respiration
  • c) There is very little transport of gases from one plant part to another
  • d) None of these

Answer: Respiration rate is faster than animals in roots, stems and leaves

 

Question:  In floating respiration substrate used is/are

  • a) Fat and carbohydrate
  • b) Carbohydrate and protein
  • c) Carbohydrate only
  • d) Fat and protein

Answer: Fat and carbohydrate

 

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

  • a) Obligate anaerobes
  • b) Aerotolerant anaerobes
  • c) Obligate aerobes
  • d) Facultative anaerobes

Answer: Obligate anaerobes

 

Question: Facultative anaerobes

  • a) Are aerobes which can grow without oxygen
  • b) Cannot use oxygen for growth, but tolerate the presence of it
  • c) Cannot use oxygen for growth and are even harmed by it
  • d) Die when given aerobic condition

Answer: Are aerobes which can grow without oxygen

 

Question: What are the products of aerobic respiration?

  • a)

  • b)

  • c)

  • d)

Answer:

 

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

  • a) Fat
  • b) Proteins
  • c) Carbohydrates
  • d) Organic acid

Answer: Fat

 

Question: Common step of both aerobic and anaerobic respiration are

  • a) EMP pathway
  • b) EMP pathway
  • c) Tricarboxylic acid cycle
  • d) Citric acid cycle

Answer: EMP pathway

 

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

  • a) Glycolysis
  • b) Acetyl CoA formation step
  • c) Pentose phosphate pathway
  • d) Krebs cycle

Answer: Glycolysis

 

Question: Glycolysis occurs in

  • a) All living cells
  • b) Only eukaryotic cells
  • c) Nerve cells
  • d) Only muscle cells

Answer: All living cells

 

Question: All are true about glycolysis, except

  • a) It produces one pyruvic acid molecule from each glucose
  • b) Oxygen independent pathway
  • c) It occurs in the cytoplasm of cell
  • d) It can operate by using both glucose and fructose

Answer: It produces one pyruvic acid molecule from each glucose

 

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

  • a) Aldolase
  • b) Dehydrogenase
  • c) Phosphofructokinase
  • d) Transphosphorylase

Answer: Aldolase

 

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

  • a) Phosphotriose isomerase
  • b) Phosphoglyceromutase
  • c) Phosphohexose isomerase
  • d) Triose kinase

Answer: Phosphotriose isomerase

 

Question: Reducing power NADH + H+ is produced during conversion step of glycolysis

  • a) Glyceraldehyde-3-phosphate to 1,3-bisphosphoglyceric acid
  • b) 3-phosphoglyceric acid to 2-phosphoglycerate
  • c) 2-phosphoglycerate to phosphoenol pyrurvate
  • d) Phosphoenol pyruvate to pyruvic acid

Answer: Glyceraldehyde-3-phosphate to 1,3-bisphosphoglyceric acid

 

Question: Which enzyme of glycolysis is also called as pacemaker enzyme?

  • a) Phosphofructokinase
  • b) Enolase
  • c) Hexokinase
  • d) Pyruvate kinase

Answer: Phosphofructokinase

 

More Questions................................................

 

Question: Choose correct option w.r.t. anaerobic respiration

  • a) All reactions occur in the cytoplasm
  • b) The first oxidation step occur in mitochondria
  • c) They require oxygen only at one step
  • d) First step of eaction occur in cytoplasm then in mitochondria

Answer: All reactions occur in the cytoplasm

 

Question: Products of anaerobic respiration are

  • a) Ethyl alcohol, CO2 or lactic acid
  • b) Ethyl alcohol and lactic acid only
  • c) Both
  • d) None of these

Answer:  Ethyl alcohol, CO2 or lactic acid

 

Question: End product of anaerobic respiration is

  • a) Lactic acid
  • b) Phosphoglyceric acid
  • c) Pyruvic acid
  • d) Glyceraldehyde phosphate

Answer: Lactic acid

 

Question: After glycolysis, first step of ethyl alcohol fermentation requires

  • a) Decarboxylation
  • b) Dehydrogenation
  • c) FAD reduction
  • d) None of these

Answer: Decarboxylation

 

Question: Concentration of alcohol in a sugar solution inoculated with yeast after which yeast gets killed is

  • a) 13%
  • b) 25%
  • c) 30%
  • d) 20%

Answer: 13%

 

Question: Cramps are formed during vigorous exercise, it is due to production of _____ in muscles.

  • a) Lactic acid
  • b) Acetic acid
  • c) Ethyl alcohol
  • d) Acetyl coenzyme A

Answer: Lactic acid

 

Question:

  • a) (i) Phosphoenol pyruvate; (ii) Ethyl alcohol
  • b) (i) Phosphoenol pyruvate; (ii) Acetyl CoA
  • c) (i) 2-phosphoglycerate; (ii) Acetyl CoA
  • d) (i) Phosphoenol pyruvate; (ii) Citric acid

Answer: (i) Phosphoenol pyruvate; (ii) Ethyl alcohol

 

Question: During cellular respiration, number of ATP used during conversion of glucose into glyceraldehyde-3-phosphate is

  • a) 2
  • b) 4
  • c) 1
  • d) 3

Answer: 2

 

Question:

  • a) Pyruvate dehydrogenase
  • b) Pyruvate oxidase
  • c) Phosphoglucomutase
  • d) Pyruvate carboxylase

Answer: Pyruvate dehydrogenase

 

Question: Number of acetyl CoA formed from one molecule of glucose is

  • a) 2
  • b) 1
  • c) 4
  • d) 6

Answer: 2

 

Question: Connecting link between glycolysis and TCA cycle is

  • a) Link reaction
  • b) Citric acid cycle
  • c) EMP pathway
  • d) ETC

Answer:  Link reaction

 

Question: How many carbon atoms are present in Acetyl CoA?

  • a) 6
  • b) 4
  • c) 3
  • d) 2

Answer: 6

 

Question: Which of the following product is formed by Krebs cycle?

  • a) ATP
  • b) ADP
  • c) Acetyl CoA
  • d) NAD+

Answer: ATP

 

Question: Citric acid is formed in Krebs cycle by the combination of oxaloacetate with

  • a) Acetyl CoA
  • b) Pyruvic acid
  • c) OAA
  • d) Malic acid

Answer: Acetyl CoA

 

Question: The enzymes of Krebs cycle where NADH + H+ are produced are

  • a)

  • b)

  • c) Isocitrate dehydrogenase, succinate dehydrogenase and malic dehydrogenase
  • d) Succinate thiokinase, succinate dehydrogenase and aconitase

Answer:  

 

Question: How many molecules of CO2 are released during two turns of Krebs cycle?

  • a) 3
  • b) 4
  • c) 6
  • d) 2

Answer: 3

 

Question: What is the net gain in a Krebs cycle?

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: Succinate dehydrogenase catalyzes the formation of

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: Where does ETS occur in our body?

  • a) Inner mitochondrial membrane
  • b) Cytoplasm
  • c) Mitochondrial matrix
  • d) Outer mitochondrial membrane

Answer: Inner mitochondrial membrane

 

Question: How many complexes are involved in electron transport in mitochondria?

  • a) 4
  • b) 5
  • c) 2
  • d) 1

Answer: 4

 

Question:

  • a) II
  • b) I
  • c) III
  • d) IV

Answer: II

 

Question: Last acceptor of electrons is _____ in ETS which give electrons to oxygen.

  • a)

  • b)

  • c)

  • d) Cyt c

Answer:

 

Question: Ubiquinone receives reducing equivalents from

  • a) Both
  • b) NADH + H+
  • c) FADH2
  • d) None of these

Answer: Both

 

Question: Mobile electron carrier in ETS in mitochondrial membrane is

  • a) Cyt c
  • b) Complex I
  • c)

  • d)

Answer: Cyt c

 

Question: Protons for the formation of ATP first pass from

  • a)

  • b)

  • c) Cyt c
  • d) Complex II

Answer:

 

Question:  How many ATP molecules are formed by oxidative phosphorylation from NADH produced during single Krebs cycle?

  • a) 9
  • b) 30
  • c) 18
  • d) 6

Answer: 9

 

Question: The efficiency of aerobic respiration is approximately

  • a) 45%
  • b) 90%
  • c) 30%
  • d) 50%

Answer: 45%

 

Question: Total energy obtained from 38 ATP is _____ kJ.

  • a) 1292
  • b) 1392
  • c) 1398
  • d) 1298

Answer: 1292

 

Question: Intermediate common to proteins and carbohydrate oxidation is

  • a) Pyruvate
  • b) Glycerol
  • c) Oxaloacetate
  • d) Succinate

Answer: Pyruvate

 

Question: Which of these has R.Q. value more than one?

  • a) Organic acids
  • b) Carbohydrate
  • c) Protein
  • d) Fat

Answer: Organic acids

 

Question: Which of the given enzymes of glycolysis is required at the beginning of process?

  • a) Hexokinase
  • b) Aldolase
  • c) Isomerase
  • d) Mutase

Answer: Hexokinase

 

Question: Conversion of fructose-6-phosphate to fructose-1,6-bisphosphate in respiration requires

  • a) Phosphofructokinase
  • b) Hexokinase
  • c) Enolase
  • d) Pyruvate kinase

Answer: Phosphofructokinase

 

Question: Select the statement which is not related to fermentation

  • a) ETS gives 11ATP for each Krebs cycle
  • b) NADH is oxidized slowly as compared to aerobic respiration
  • c) It gives only 2ATP as net for glucose degradation upto pyruvic acid
  • d) It accounts for only a partial breakdown of glucose

Answer: ETS gives 11ATP for each Krebs cycle

 

Question: First step of ethyl alcohol fermentation requires

  • a) Decarboxylation
  • b) FMN
  • c) Dehydrogenation
  • d) Zn2+

Answer: Decarboxylation

 

Question: How many redox equivalents are removed from two molecules of 3-PGAL?

  • a) 4
  • b) 1
  • c) 2
  • d) 3

Answer: 4

 

Question: Primary acceptor of TCA cycle is

  • a) OAA
  • b) Acetyl CoA
  • c) Citric acid
  • d) Pyruvic acid

Answer: OAA

 

Question: In TCA cycle, how many reduced coenzymes are produced from one Acetyl CoA?

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: 5C intermediate molecule in TCA cycle is

  • a)

  • b) Fumaric acid
  • c) Succinyl CoA
  • d) Citric acid

Answer:

 

Question: Number of total ATP generated in TCA cycle per Acetyl CoA molecule is

  • a) 12
  • b) 10
  • c) 14
  • d) 24

Answer: 12

 

Question: Substrate level phosphorylation in TCA occurs when

  • a) Succinyl CoA changes to succinic acid
  • b) Succinic acid changes to fumaric acidFumaric acid changes to malic acid
  • c) Fumaric acid changes to malic acid
  • d)

Answer: Succinyl CoA changes to succinic acid

 

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