NEET Biology Respiration In Plants MCQs Set 01

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: A

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: A

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: A

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: A

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: A

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: A

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: A

Question.  In floating respiration substrate used is/are
(a) Fat and carbohydrate
(b) Carbohydrate and protein
(c) Carbohydrate only
(d) Fat and protein

Answer: A

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: A

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: A

Question.  Maximum energy can be obtained from oxidation of which respiratory substrate
(a) Fat
(b) Proteins
(c) Carbohydrates
(d) Organic acid

Answer: A

Question. Common step of both aerobic and anaerobic respiration are
(a) EMP pathway
(c) Tricarboxylic acid cycle
(d) Citric acid cycle

Answer: A

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: A

Question. Glycolysis occurs in
(a) All living cells
(b) Only eukaryotic cells
(c) Nerve cells
(d) Only muscle cells

Answer: A

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: A

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: A

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: A

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: A

Question. Which enzyme of glycolysis is also called as pacemaker enzyme?
(a) Phosphofructokinase
(b) Enolase
(c) Hexokinase
(d) Pyruvate kinase

Answer: A

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: A

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: A

Question. End product of anaerobic respiration is
(a) Lactic acid
(b) Phosphoglyceric acid
(c) Pyruvic acid
(d) Glyceraldehyde phosphate

Answer: A

Question. After glycolysis, first step of ethyl alcohol fermentation requires
(a) Decarboxylation
(b) Dehydrogenation
(c) FAD reduction
(d) None of these

Answer: A

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: A

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: A

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: A

Question. Number of acetyl CoA formed from one molecule of glucose is
(a) 2
(b) 1
(c) 4
(d) 6

Answer: A

Question. Connecting link between glycolysis and TCA cycle is
(a) Link reaction
(b) Citric acid cycle
(c) EMP pathway
(d) ETC

Answer: A

Question. How many carbon atoms are present in Acetyl CoA?
(a) 6
(b) 4
(c) 3
(d) 2

Answer: A

Question. Which of the following product is formed by Krebs cycle?
(a) ATP
(b) ADP
(c) Acetyl CoA
(d) NAD⁺

Answer: A

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: A

Question. How many molecules of CO₂ are released during two turns of Krebs cycle?
(a) 3
(b) 4
(c) 6
(d) 2

Answer: A

Question. Where does ETS occur in our body?
(a) Inner mitochondrial membrane
(b) Cytoplasm
(c) Mitochondrial matrix
(d) Outer mitochondrial membrane

Answer: A

Question. How many complexes are involved in electron transport in mitochondria?
(a) 4
(b) 5
(c) 2
(d) 1

Answer: A

Question. Ubiquinone receives reducing equivalents from
(a) Both
(b) NADH + H⁺
(c) FADH₂
(d) None of these

Answer: A

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: A

Question. The efficiency of aerobic respiration is approximately
(a) 45%
(b) 90%
(c) 30%
(d) 50%

Answer: A

Question. Total energy obtained from 38 ATP is _____ kJ.
(a) 1292
(b) 1392
(c) 1398
(d) 1298

Answer: A

Question. Intermediate common to proteins and carbohydrate oxidation is
(a) Pyruvate
(b) Glycerol
(c) Oxaloacetate
(d) Succinate

Answer: A

Question. Which of these has R.Q. value more than one?
(a) Organic acids
(b) Carbohydrate
(c) Protein
(d) Fat

Answer: A

Question. Which of the given enzymes of glycolysis is required at the beginning of process?
(a) Hexokinase
(b) Aldolase
(c) Isomerase
(d) Mutase

Answer: A

Question. Conversion of fructose-6-phosphate to fructose-1,6-bisphosphate in respiration requires
(a) Phosphofructokinase
(b) Hexokinase
(c) Enolase
(d) Pyruvate kinase

Answer: A

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: A

Question. First step of ethyl alcohol fermentation requires
(a) Decarboxylation
(b) FMN
(c) Dehydrogenation
(d) Zn²⁺

Answer: A

Question. How many redox equivalents are removed from two molecules of 3-PGAL?
(a) 4
(b) 1
(c) 2
(d) 3

Answer: A

Question. Primary acceptor of TCA cycle is
(a) OAA
(b) Acetyl CoA
(c) Citric acid
(d) Pyruvic acid

Answer: A

Question. Number of total ATP generated in TCA cycle per Acetyl CoA molecule is
(a) 12
(b) 10
(c) 14
(d) 24

Answer: A