Respiration in Plants- Quiz 2

Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?

• 0%

• 2%

• 10%

• 100%

Which one of the following is the only 5-carbon compound formed during Krebs’ cycle?

• Malic acid

• Succinic acid

• Cis-aconitic acid

• $\alpha$ -ketoglutaric acid
  

Cytochromes are found in

• Cristae of mitochondria

• Lysosomes

• Matrix of mitochondria

• Outer wall of mitochondria

Oxidative phosphorylation is :-

• Addition of phosphate group to ATP.

• Formation of ATP by energy released from electrons removed during substrate oxidation.

• Formation of ATP by transfer of phosphate group from a substrate to ADP

• Oxidation of phosphate group in ATP

Which of the following metabolites enter the TCA cycle during glucose oxidation ?

• Oxaloacetic acid

• Pyruvic acid

• Acetyl CoA

• Malic acid

Electrons from NADH produced in the mitochondrial matrix during citric acid cycle are oxidised by :–

• Complex II

• Complex III

• Complex I

• Complex IV

Which statement is wrong for Krebs' cycle ?

• There is one point in the cycle where FAD⁺ is reduced to FADH₂

• During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised

• The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid

• There are three points in the cycle where NAD⁺ is reduced to NADH + H⁺

Which of the following enzymes involved in Kreb’s cycle is not present in the mitochondrial matrix?

• Aconitase

• Malate dehydrogenase

• Fumarase

• Succinate dehydrogenase

Respiratory Quotient (RQ) value of tripalmitin is

• 0.9

• 0.7

• 0.07

• 0.09

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by

• Aldolase

• Hexokinase

• Enolase

• Phosphofructokinase