Multiple Choice Questions

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TCA cycle enzymes are located in

  • cristae

  • outer membrane

  • mitochondrial matrix

  • mitochondrial intermembrane space


C.

mitochondrial matrix

TCA cycle enzymes are soluble proteins located in the mitochondrial matrix space, except for succinate dehydrogenase, which is an integral membrane protein that is firmly attached to the inner surface of the mitochondrial inner membrane, where it communicates directly with components in the respiratory chain.


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Out of 38 molecules of ATP produced upon aerobic respiration of glucose, the break up if ATP production in glycolysis (P), pyruvate to acetyl Co- A formation (Q) and Krebs' cycle (R) is as follows

  • P= 2, Q= 6, R= 30

  • P= 8, Q= 6,R= 24

  • P= 8, Q= 10, R= 2

  • P= 2, Q= 12, R= 24


The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products

Arrows numbered 4, 8 and 12 can all be 

  • NADH

  • ATP

  • H2O

  • FAD+ or FADH2


Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?

  • Glucose-6-phosphate

  • Fructose 1, 6-bisphosphate

  • Pyruvic acid

  • Acetyl Co-A


Which one is product of aerobic respiration

  • Malic acid 

  • Ethyl alcohol

  • Lactic acid

  • Pyruvic acid


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How many ATP molecules will be generated in a plant system . during complete oxidation of 40 moles of glucose?

  • 190

  • 380

  • 1520

  • 3040


Which of the following substances yield less than 4 kcal/mol when its phosphate bond is hydrolysed

  • Creatine phosphate

  • ADP

  • Glucose-6-phosphate

  • ATP


Citric acid cycle is the alternate name of which of the following

  • HMP shunt

  • Glycolysis

  • TCA cycle

  • Calvin cycle


Respiratory enzymes are present in the following organelle

  • peroxysome

  • chloroplast

  • mitochondrion

  • lysosome


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How many ATP are produced when one molecule of FADH2 is oxidised to FAD through electron transport system?

  • 2

  • 3

  • 1

  • 4


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