CBSE Questions for Class 11 Medical Biology Respiration In Plants Quiz 18 - MCQExams.com

Phosphorylation of glucose during glycolysis is catalysed by
  • Phosphoglucomutase
  • Phosphoglucoisomerase
  • Hexokinase
  • Phosphorylase
Select the correct statements.
(i) Between temperature range $$0-25^o$$C, rate of the respiration doubles for every $$10^o$$C rise in temperature.
(ii) Cytochromes are iron-porphyin compounds.
(ii) Respiratory rate of wounded or injures plant parts generally decreases.
  • (i) and (ii)
  • (ii) and (iii)
  • (i) and (iii)
  • (i),(ii) and (iii)
In mitochondria during aerobic respiration how many times oxidative decarboxylation takes place from one molecule of acetyl CoA?
  • 1
  • 3
  • 2
  • 4
Decarboxylation in glycolysis occurs at which step
  • Glicose 6P to Fructose 6P
  • Splitting of fructose 1,6 bis P
  • Isomerisation of 3 phospho glycerate to 2- phospho glycerate
  • No where
Which of the following is the first stable product of photosynthesis in maize?
  • PGA
  • PGAL
  • PEPA
  • OAA
In alcohol fermentation
  • Triose phosphate is the electron donor while acetaldehyde is the electron acceptor
  • Triose phosphate is the electron donor while pyruvic acid is the electron acceptor
  • There is no electron donor
  • Oxygen is the electron acceptor
How many steps of glycolysis are irreversible?
  • $$3\quad steps\rightarrow 1st,\quad 3rd\quad and\quad last$$
  • $$3\quad steps\rightarrow 1st,\quad 5th\quad and\quad last$$
  • $$2\quad steps\rightarrow 1st,\quad last$$
  • 1st step only
Which of the following are isomers?
  • $$3$$PGA and $$2$$PGA
  • PGAL and DHAP
  • Glucose and Fructose
  • All of these
The end products of fermentation are
  • $$O_2$$ and ethyl alcohol
  • $$O_2$$ and acetaldehyde
  • $$CO_2$$ and ethyl alcohol
  • $$CO_2$$ and acetaldehyde
Which of the following statements is not correct about oxidative decarboxylation?
  • It takes place in mitochondrial matrix
  • Two molecules of NADH are produced by one molecule of pyruvate
  • Pyruvate dehydrogenase is used as catalyst in this reaction
  • Two molecules of NADH are produced by two molecules of pyruvate
Substrate level phosphorylation occurs during which step of Kreb's cycle?
  • Succinyl -CoA$$\rightarrow$$ Succinic acid
  • Isocitric acid $$\rightarrow$$ Oxalosuccinic acid
  • Oxalosuccinic acid $$\rightarrow$$ $$\alpha$$-keto glutaric acid
  • Malic acid $$\rightarrow$$ OAA
How many ATP molecules will be produced when one molecule of $$3$$-phosphophoglyceric acid is completely oxidised?
  • $$16$$
  • $$17$$
  • $$32$$
  • $$20$$
Glycolysis is
  • Anaerobic
  • Aerobic
  • Anaerobic and Aerobic both
  • None
The common component of TCA cycle and electron transport chain is : 
  • Succinate dehydrogenase complex
  • ATP synthase
  • Acetyl CoA
  • Succinyl CoA
In aerobic respiration one glucose produces?
  • $$8$$ NADH $$+2 FADH_2 +2$$ATP
  • $$12$$ NADH $$+2 FADH_2+ 38$$ ATP
  • $$12$$ NADH $$+30$$ ATP $$+H_2O$$
  • $$10$$ NADH $$+ 2FADH_2 +2$$ATP $$+ 2$$GTP
If $$5$$ molecules of pyruvic acid are used in Kreb's cycle it gives us?
  • $$50$$ ATP
  • $$65$$ ATP
  • $$75$$ ATP
  • $$100$$ ATP
How many TCA  cycles are required  during the complete oxidation of one sucrose molecule.
  • 4
  • 2
  • 1
  • 3
The common component of TCA cycle and electron transport chain is?
  • Succinate dehydrogenase
  • ATP synthase
  • Acetyl Co-A
  • Succinyl Co-A
The substance present between the product of first dephosphorylation and the subtrate of $$2^{nd}$$ dephosphorylation in glycolysis is
  • 3 - PGA
  • PEP
  • 2 - PGA
  • 1, 3 bis PGA
Calculate how many ATP molecules are directly synthesised in aerobic respiration from one glucose molecule?
  • $$2$$ ATP
  • $$4$$ ATP
  • $$6$$ ATP
  • $$8$$ ATP
How many ATPs are produced by substrate-level phosphorylation (SLP) in Krebs cycle from each glucose?
  • 2 ATP
  • 4 ATP
  • 8 ATP
  • 34 ATP
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Biology Quiz Questions and Answers