CBSE Questions for Class 11 Medical Biology Respiration In Plants Quiz 10 - MCQExams.com

Kreb's cycle produces
  • 2CO$$_2$$
  • 3CO$$_2$$
  • 4CO$$_2$$
  • 6CO$$_2$$
Oxidation of pyruvate forms
  • Acetyl CoA
  • NADH
  • $$CO_2$$
  • All the above
Anaerobic respiration is
  • Complete oxidation
  • Incomplete oxidation
  • Anabolic reaction
  • Fermentation
When succinate is oxidized in Krebs cycle, it's hydrogen is accepted by
  • NAD$$^+$$
  • FAD
  • FMN
  • Fumarate
Hexose monophosphate pathway takes place in
  • Mitochondrial matrix
  • Cristae
  • Cytoplasm
  • E.R
Which type of fermentation is accompanied by CO$$_2$$ evolution?
  • Alcoholic fermentation
  • Lactic acid fermentation
  • Both A and B
  • None of the above
In alcoholic fermentation, CO$$_2$$ is evolved during
  • Decarboxylation of pyruvic acid
  • Formation of acetaldehyde
  • Oxidation of acetaldehyde
  • Both A and B
Fat has two components, glycerol and fatty acids. They enter common pathway of respiration as
  • DiHAP and $$\alpha$$-ketoglutarate
  • DiHAP and acetyle CoA
  • Glyceric acid and acetyl CoA
  • Glyceric acid and $$\alpha$$-ketoglutarate
Mineral activator of enzyme aconitase is
  • Mn
  • Mg
  • Fe
  • Cu
An important requirement of fermentation is
  • Oxygen
  • Zymase
  • Fe
  • CO$$_2$$
Which of the following is not formed during anaerobic respiration?
  • Pyruvate
  • Ethyl alcohol
  • CO$$_2$$
  • Acetyl CoA
Buchner was successful in extracting a respiratory enzyme complex
  • ATP
  • NADH
  • Zymase
  • Mitochondria
Krebs cycle starts with the formation of six carbon compound by reaction between
  • Malic acid and acetyl CoA
  • Succinic acid and pyruvic acid
  • Fumaric acid and pyruvic acid
  • Oxalo-acetic acid and acetyl CoA
In the process of respiration in plants 180g of glucose plus 192 g of oxygen produce ___________________.
  • 132 g of $$CO_2$$, 54 g of water and 343 Cal. of energy
  • 264 g of $$CO_2$$, 108 g of water and 686 Cal. of energy
  • 528 g of $$CO_2$$, 216 g of water and 1372 Cal. of energy
  • Large amount of $$CO_2$$, no water and no energy
Link between glycolysis, Krebs cycle and $$\beta$$-oxidation of fatty acid or carbohydrate and fat metabolism is
  • Oxaloacetic acid
  • Succinic acid
  • Citric acid
  • Acetyl CoA
In glycolysis, the end product is
  • Protein is converted into glucose
  • Glucose is converted into glycogen
  • Starch is converted into glucose
  • Glucose is converted into pyruvic acid
Which of the following process is used in the conversion of pyruvate to acetyl CoA?
  • Oxidative decarboxylation
  • Oxidative dehydrogenation
  • Oxidative dehydration
  • Oxidative phosphorylation.
The enzyme which converts glucose to glucose 6-phosphate is
  • Phosphorylase
  • Glucose-6-phosphatase
  • Hexokinase
  • Glucose synthetase
The reactions of Kreb's/citric acid cycle take place
  • In the cytoplasm
  • In ER
  • In matrix of mitochondria
  • On the surface of mitochondria.
R.Q. can vary due to
  • Temperature
  • Respiratory substrate
  • Light and oxygen
  • Respiratory product.
NADH of glycolysis reacts with an inorganic element during liberation of energy. The respiration is
  • Photorespiration
  • Fermentation
  • Aerobic respiration
  • Anaerobic respiration
Sequence in Krebs cycle is
  • $$\alpha$$ -Ketoglutaric acid -->Isocitric acid -->Oxalosuccinic acid
  • Isocitric acid --> Oxalosuccinic acid -->$$\alpha$$ -Ketoglutaric acid
  • Isocitric acid --> $$\alpha$$-Ketoglutaric acid --> Oxalosuccinic acid
  • Oxalosuccinic acid --> Isocitric acid --> $$\alpha$$-Ketoglutaric acid.
Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to
  • Oxaloacetate
  • PEP
  • Pyruvate
  • Acetyl CoA
In hexose monophosphate shunt, number of molecules of carbon dioxide evolved is
  • Less than glycolysis
  • Much less than glycolysis
  • Mere than glycolysis
  • Same as glycolysis
In succulents, respiratory quotient is less than one due to
  • Incomplete oxidation
  • Incomplete reduction
  • Complete reduction
  • Complete oxidation
Which is key intermediate compound linking glycolysis to Krebs cycle?
  • Malic acid
  • Acetyl CoA
  • NADH
  • ATP
Citric acid cycle is the alternate name of
  • HMP shunt
  • Glycolysis
  • TCA cycle
  • Calvin cycle.
Pyruvic acid is formed at the end of
  • Calvin cycle
  • Glycolysis
  • Krebs cycle
  • Pentose phosphate pathway.
Succinate is oxidised to fumarate in Krebs cycle by
  • Loss of electrons
  • Removal of hydrogen
  • Addition of oxygen
  • Removal of oxygen
Most of the biological energy is supplied by mitochondria through
  • Breaking of proteins
  • Reduction of $$NADP^+$$
  • Breaking of sugars
  • Oxidising TCA substrates
Fumerase changes fumaric acid into
  • Malic acid
  • Maleic acid
  • Citric acid
  • Succinic acid
Biological oxidation in Krebs cycle involves
  • $$N_2$$
  • $$O_2$$
  • $$SO_2$$
  • $$CO_2$$.
Which of the following is an end product of citric acid cycle?
  • Citric acid
  • Lactic acid
  • Pyruvic acid
  • Carbon dioxide
Glycolysis and TCA cycle operate respectively in
  • Cytosol and matrix of mitochondrion
  • Cytosol and stroma of chloroplast
  • Cytosol and oxysomes of mitochondrion
  • Matrix of mitochondrian and inner membrane of mitochondrian
Krebs cycle is
  • Oxidation of glucose to alcohol and water
  • Oxidation of acetyl CoA to carbon dioxide and water involving electron transport
  • Complete oxidation of acetyl CoA without electron transport
  • Complete reduction of acetyl CoA to carbon doxide and water.
The site of Krebs cycle in bacteria is
  • Nucleoid
  • Cytoplasm
  • Plasma membrane
  • Ribosomes.
Fermentation products of yeast are
  • H$$_2$$O + CO$$_2$$
  • Methyl alcohol + CO$$_2$$
  • Methyl alcohol + Water
  • Ethyl alcohol + CO$$_2$$
How many NADH is formed during glycolysis?
  • 1
  • 3
  • 2
  • 5
Pyruvic acid is a product of
  • Acetyl
  • CoA
  • Starch
  • Glucose
Krebs cycle is component of
  • Photosynthesis
  • Aerobic respiration
  • Anaerobic respiration
  • Photorespiration.
Fructose 6-phosphate is changed to fructose 1,6-diphosphate by
  • Phosphoglycerate
  • Phosphatase
  • Phosphofructokinase
  • Enolase
Oxidation of pyruvate to CO$$_2$$ and H$$_2$$O occurs through
  • Citric acid cycle
  • Tricarboxylic acid
  • Krebs cycle
  • All of the above.
Number of ATP produced from one pyruvic acid during conversion to acetyl CoA is
  • 3
  • 5
  • 8
  • 15
Ketoglutarate dehydrogenase brings about 
  • Oxidation and decarboxylation
  • Oxidation
  • Decarboxylation
  • Reduction
Alcoholic fermentation uses
  • Ribosomes
  • Golgi bodies
  • Mitochondrial enzymes
  • Cytoplasmic enzymes
For two molecules of glucose, glycolysis uses and produces ATP molecules
  • 4 and 8
  • 2 and 4
  • 2 and 8
  • 2 and 2
Fermentation produces
  • Protein and acetic acid
  • Alcohol and lipoprotein
  • Alcohol and lactic acid
  • Ethers and acetones
In case NADH is oxidised in a single step to form water
  • Cell will burn
  • Most of energy is liberated as heat
  • 3 ATP are formed
  • 5 ATP are formed
What is produced when succinyl CoA is changed to succinate?
  • ATP
  • GTP
  • CTP
  • ATP in plants and GTP in animals
Substrate phosphorylation occurs during
  • Fumaric acid Malic acid
  • Oxalosuccinic acid Ketoglutaric acid
  • Succinic acid Fumaric acid
  • Ketoglutaric acid Succinic acid
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