Respiration in Plants · Question 32

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because

1. a proton gradient forms across the inner membrane
2. there is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP)
3. high energy bonds are formed in mitochondrial proteins
4. ADP is pumped out of the matrix into the intermembrane space

The overall goal of glycolysis, Krebs' cycle and the electron transport system is the formation of

1. ATP in one large oxidation reaction
2. sugars
3. nucleic acids
4. ATP in small stepwise units

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membrane in eukaryotes and in cytosol in prokaryotes. This enzyme is

1. isocitrate dehydrogenase
2. malate dehydrogenase
3. succinate dehydrogenase
4. lactate dehydrogenase

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?

1. 1
2. 2
3. 30
4. 57

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?

1. Glycolysis
2. Krebs' cycle
3. Conversion of pyruvic acid to acetyl CoA
4. Electron transport chain

In glycolysis, during oxidation electrons are removed by

1. ATP
2. glyceraldehyde-3-phosphate
3. NAD+
4. molecular oxygen.

In alcohol fermentation

1. triose phosphate is the electron donor while acetaldehyde is the electron acceptor
2. triose phosphate is the electron donor while pyruvic acid is the electron acceptor
3. there is no electron donor
4. oxygen is the electron acceptor.

In which one of the following do the two names refer to one and same thing?

1. Krebs' cycle and Calvin cycle
2. Tricarboxylic acid cycle and citric acid cycle
3. Citric acid cycle and Calvin cycle
4. Tricarboxylic acid cycle and urea cycle

How many ATP molecules are produced by aerobic oxidation of one molecule of glucose?

1. 2
2. 4
3. 38
4. 34

Cytochrome is

1. metallo flavo protein
2. Fe containing porphyrin pigment
3. glycoprotein
4. lipid.