CBSE Questions for Class 11 Medical Biology Respiration In Plants Quiz 15 - MCQExams.com

Select the correct statement regarding glycolysis.
  • Glucose is completely oxidized
  • Glucose is partially oxidized
  • It provide eight ATP during anaerobic respiration
  • Its key product is triose sugar
Which or the following is the high energy molecule produced by oxidative decarboxylation in aerobic ,respiration but is neither the intermediate of TCA nor EMP?
  • $$NADH+H^+$$
  • $$ATP$$
  • Acetyl CoA
  • Succinyl CoA
Pyruvic acid $$\underset {dehydrogenase}{\xrightarrow {Pyruvate}} Acetyl\ CoA + CO_{2} + NaDH_{2}$$
In this given reaction which of the following coenzyme is not used?
  • $$Mg^{++}$$
  • $$NAD$$
  • $$Co-A$$
  • $$TPP$$
FAD takes part in TCA cycle as electron acceptor during conversation of 
  • Succinyl CoA to succinic acid
  • Fumaric acid to malic acid
  • $$\alpha$$ - Ketogluterate to succinyl CoA
  • Succinic acid to fumaric acid
Which of the following is incorrect about fermentation?
  • Toddy is made by fermenting sap from palms.
  • Propionibacterium is used to ferment the cheese.
  • The puffed-up appearance of dough is due to the production of $${ CO }_{ 2 }$$.
  • Fermentation in muscles produces alcohol.
If one molecule of acetyl-CoA  oxidized inside eukaryotic cell then gain of energy is equal to
  • $$12 ATP$$
  • $$9 ATP$$
  • $$18 ATP$$
  • $$15 ATP$$
The three boxes in this diagram represent the three major biosynthesis pathways in aerobic respiration. Arrows represent net reactants or products.
Arrow numbered $$4$$, $$8$$ and $$12$$ can all be?

1190266_736c69e98aaa4419ab294a1ea977cb48.jpg
  • NADH
  • ATP
  • $$H_2O$$
  • $$FAD^+$$ or $$FADH_2$$
The value of R.Q. is less than one of which substrate?
  • Glucose
  • Sucrose
  • Starch
  • Proteins
Which of the following correctly shows the difference in the products of glycolysis and Krebs cycle per glucose molecule?
  • Glycolysis - 4 ATP, 1 reduced NAD, Krebs Cycle - 4 reduced NAD, 1 reduced FAD, 1 ATP
  • Glycolysis - 4 ATP, 2 reduced NAD, Krebs Cycle - 8 reduced NAD, 2 reduced FAD, 2 ATP
  • Glycolysis - 2 ATP, 1 reduced NAD, Krebs Cycle - 3 reduced NAD, 1 reduced FAD, 1 ATP
  • Glycolysis - 2 ATP, 2 reduced NAD, Krebs Cycle - 6 reduced NAD, 2 reduced FAD, 2 ATP
In Krebs's cycle, the conversion of succinyl CoA to succinic acid requires?
  • Acetyl CoA$$+$$GDP$$+$$ip
  • CoA$$+$$GTP$$+$$ip
  • Acetyl CoA$$+$$GTP$$+$$ip
  • GDP$$+$$ip
RQ in anaerobic respiration is?
  • $$0.7$$
  • $$0.9$$
  • Unity
  • Infinity
One of the following is common to glycolysis as well as Krebs cycle in eukaryotes.
  • Substrate level phosphorylation
  • Photophosphorylation
  • Localization in mitochondria
  • Production of $$FADH_2$$
Mark the incorrect statement.
  • Breaking of C-O bonds of complex molecules by oxidation cells leading to the release of a lot of energy is called cellular respiration.
  • Initial stage of respiration takes place in cytoplasm.
  • Incomplete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of CO$$_2$$.
  • TCA cycle starts with the condensation of acetyl group with OAA and water to yield citric acid.
Select the number of incorrect statements for the process of fermentation.
A . It involves only partial breakdown of glucose.
B $$NADH_2$$ is oxidized to NAD by reduction of organic compound.
C. No ATP are produced during fermentation as it is extracellular process in some microbes.
D. There is no ETS and Kreb's cycle.
E. Maximum concentration of alcohol in alcohol in alcoholic brevarage is 100 %.
  • 2
  • 3
  • 4
  • 5
How many molecules of pyruvic aci are formed in glycolysis
  • 2
  • 1
  • 15
  • 16
Which of the following is incorrect for glycolysis?
  • The end products of this process are $$CO_2$$ and $$H_2O$$
  • IT produces ATP
  • It uses ATP
  • None of these.
The end product of glycolysis is
  • ATP (Adenosine triphoshate )
  • Protien
  • Carbohydrates
  • All of the above
Final electron acceptor in fermentation 
  • $$O_2$$
  • organic molecule
  • $$H_2O$$
  • always pyruvic acid
Which of these statements is correct?
  • Glycolysis occurs in cytosol.
  • Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
  • Enzymes of TCA cycle are present in mitochondrial matrix.
  • Oxidative phosphorylation takes place in outer mitochondrial membrane.
The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called?
  • Glycolysis
  • Fermentation
  • Aerobic respiration
  • Photorespiration
In respiration pyruvic acid is 
  • Formed only when oxygen is available
  • One of the products of Kreb's cycle
  • Broken down into a two carbon fragment and $$CO_2$$
  • A result of protein breakdown.
How many molecule of $$CO_2$$ are released in citric acid cycle?
  • One
  • Two
  • Three
  • Six
Decomposition is a type of _________.
  • Aerobic respiration
  • Anaerobic respiration
  • exothermic reaction
  • None of these
Find the incorrect statement.
  • In electron transport chain, electrons move downhill w.r.t. redox potential scale
  • Electrons removed from PSI are replaced by PS II in photosynthesis
  • During splitting of water, $$H^+$$ and $$O_2$$ are released inside the lumen
  • When the light only beyond $$680$$nm and wavelength is available, both cyclic and non-cyclic photo phosphorylation's occur
The maximum yield of ATP from the complete oxidation of sucrose via aerobic respiration is?
  • $$37$$
  • $$44$$
  • $$60$$
  • $$50$$
Total number of ATP molecules gain during complete oxidation of $$1$$ molecules of glucose by substrate level phosphorylation.
  • $$8$$ATP
  • $$6$$ATP
  • $$4$$ATP
  • $$1$$ATP
Synthesis of glucose from sources other than carbohydrate is called?
  • Glycolysis
  • Glycogenesis
  • Gluconeogenesis
  • Glycogenolysis
Which one is incorrect with respect to cell respiration?
  • Krebs cycle produces $$CO_2$$
  • Glycolysis requires $$O_2$$
  • $$NADH_2$$ is oxidised in $$ETC$$
  • None of these
Number of oxygen atoms required for aerobic oxidation of one pyruvate.
  • $$5$$
  • $$8$$
  • $$10$$
  • $$12$$
Which of the following is the step of TCA cycle showing substrate levelphosphorylation?
  • Succinyl CoA$$\rightarrow $$ fumarate
  • Succinyl CoA $$\rightarrow$$ succinate
  • Fumarate$$\rightarrow $$Malate
  • Malate$$\rightarrow $$oxaloacetate
Which one of the following is a $$4C$$ compound?
  • Oxaloacetic acid
  • Pyruvic acid
  • Citric acid
  • RUBP
Select the incorrect statement regarding Kreb's cycle.
  • The FAD molecular is reduced to$$ FADH_2$$ during the conversion succinic acid to fumaric acid
  • Substrate level phosphorylation
  • Succinate dehydrogenase in formded atached to the inner mitochondrial membrane
  • The cycle starts with condensation of acetyl CoA with citric acid
In Citric acid cycle how many substrate level phosphorylation (s) occur between $$\alpha-$$ ketoglutaric acid and succinic acid?
  • Four
  • One
  • Two
  • Three
Haemocyanin is respiratory pigment of?
  • Molluscs
  • Crustaceans
  • Millipede
  • Both $$(1)$$ & $$(2)$$
During fermentation what does not occurs ___________________.
  • Oxidation of glucose into pyruvate
  • Substrate level phosphorylation
  • Oxidation of $$NADH_2$$
  • Oxidative phosphorylation.
How many rounds of Krebs cycle will be required to produce $$6$$ FADH2 molecular 
  • $$3$$
  • $$6$$
  • $$12$$
  • $$24$$
The only 5C compound in TCA cycle is:
  • Oxalo-succinic acid
  • Citric acid
  • Succinic acid
  • $$\alpha$$-ketoglutarate
Pyruvic acid is the end product of glycolysis. What are the three types of metabolic fates of pyruvic acid under aerobic and anaerobic conditions? Write in the space provided in the diagram.
1846648_88d0845e4eb14d42b2041e505d89b919.png
  • a) Adenosine triphosphate b)Acetyl CoA   c)Ethanol  
  • a) Lactic acid b)citric acid c) Flavin adenine dinucleotide 
  • a) Lactic acid b) Ethanol c) Acetyl CoA 
  • a) Nicotinamide adenine dinucleotide b)Ethanol  c)Lactic acid   
What is produced by fermentation of agricultural waste?
  • Ethanol
  • Ethanol Amine
  • Aminoacids
  • Base
Rate of oxidation depends on amount of:
  • Inorganic matters
  • Organic matters
  • Nutrients
  • Water
Bacteria obtains useful energy by oxidation of certain elements, such as:
  • Nutrients
  • Sulphur and iron
  • Calcium
  • Phosphorous
Pyruvic acid +$$CoA+NAD^+\dfrac{Mg^{2+}}{X}\rightarrow Y+CO_2+NADH+H^+$$
In the following reaction, identify X and Y respectively :
  • Water, Acetyl CoA
  • Acetyl CoA, Pyruvate dehydrogenase
  • Pyruvate dehydrogenase, Acetyl CoA
  • Pyruvate dehydrogenase, Oxalo-acetic acid
How many ATP are formed in the oxidation of one molecule of glucose through the pentose phosphate path?
  • 36
  • 38
  • 40
  • 8
During the Krebs cycle, the first and the only five carbon-containing compounds formed is?
  • Cis-aconitic acid
  • Oxaloacetic acid
  • -ketoglutaric acid
  • Fumaric acid
The net gain of energy in glycolysis is
  • 12 ATP
  • 2 ATP
  • 4 ATP
  • Zero ATP
The value of $$Q_{10}$$ of respiration is –
  • Three
  • Two
  • Four
  • Six
Which of the following options is correct with respect to steps in Krebs cycle?
Statement 1 - Succinic dehydrogenase converts succinic acid to fumaric acid.
Statement 2 - Malic acid forms succinic acid in presence of malate dehydrogenase.
  • Statement 1 and statement 2 both are correct.
  • Statement 1 is correct but statement 2 is incorrect.
  • Statement 1 is incorrect but statement 2 is correct.
  • Statement 1 and statement 2 is incorrect.
The number of substrate level phosphorylations in one turn of citric acid cycle is
  • One
  • Two
  • Three
  • Zero
How many ATPs are generated by the fermentation of one molecule of maltose?
  • 2
  • 3
  • 6
  • 4
If volume of $${CO_2}$$ given out during respiration is more than the volume of $${O_2}$$ used the respiratory substrate will be
  • Carbohydrate
  • Fat
  • Protein
  • Organic fat
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