Read the given statements and choose the correct option
A. Yeasts poison themselves to death when the concentration of alcohol reaches about 13%.
B. During glucose activation phase of glycolysis, 2 ATP are consumed.
1. Only A is correct.
2. Only B is incorrect.
3. Both A and B are correct.
4. Both A and B are incorrect.
Identify the wrong statements
A. There are three steps in Krebs cycle where is reduced to NADH + .
B. Krebs cycle starts with the condensation of acetyl group with fumaric acid to yield citric acid.
C. Cytochrome c is a small, mobile carrier protein, which transfers protons between complex III and IV.
D. In glycolysis, glucose undergoes partial oxidation and at the end produces 2 molecules of pyruvic acid.
1. B, C and D
2. B and C only
3. A, B and C
4. C and D only
How many ATP molecules will be formed from complete oxidation of two molecules of 3-PGAL in an
eukaryotic cell?
1. 34
2 40
3. 36
4. 42
In electron transport system of respiration, which enzyme complex is odd with respect to electron carrier?
1. Complex I
2. Complex III
3. Complex IV
4. Complex V
Maximum energy is released during conversion of
1. Glucose into pyruvic acid.
2. Glucose into ethyl alcohol and
3. Pyruvic acid into acetyl CoA.
4. Pyruvic acid into and .
How many of the following statements is correct about respiration?
I. Respiratory substrate is often more than one in living organism.
II. Pure protein or pure fat can never be respiratory substrates.
III. Protein has maximum possible option for entry into respiratory pathway.
IV. Acetyl CoA can be product or precursor of fatty acid .
Option :
1. 4
2. 3
3. 2
4. 1
During electron transport in mitochondria, which statement is not correct about complex – IV
1. It is terminal donor of electron to oxygen.
2. It is also known as cytochrome oxidase .
3. It contains Cu, which is reversibley oxidise from
4. It receives electron from UQ.
Which one is correct
1. During the fermentation, 2 molecules of ATP per molecule of glucose is the net gain.
2. Oxidative phosphorylation produces the most ATP in the cell.
3. During TCA cycle oxidative steps are coupled to the reductions of carriers.
4. All.
Which one is false?
1. Less than 7% of energy in glucose is released during lactic or alcoholic fermentation.
2. Fermentation is observed in all cells.
3. is an essential requirement for aerobic respiration but it enters the respiratory process at the end.
4. In aerobic respiration glucose is broken down into
How many of the following statement is correct for glycolysis?
(1) It is the only process of respiration in aerobic respiration.
(2) During glycolysis there is partial oxidation of glucose to form one molecule of pyruvic acid.
(3) In glycolysis, there are ten enzyme catalysed steps.
(4) When PGAL is converted into BPGA, two redox equivalents are removed.
Options :
1. 4
2. 3
3. 2
4. 1
What could be the possible reasons for production of less than 36-ATP during aerobic respiration of glucose?
(1) Pathway was not sequential.
(2) Cytoplasmic NADH was not transferred to mitochondria.
(3) Some of the intermediate of pathway was utilized.
(4) Respiratory substrate was other than glucose.
Options :
1. 1, 2, 3 and 4
2. 1, 2 and 3
3. 2, 3 and 4
4. 1, 3 and 4
Which of the following complex of mitochondrial ETS having two copper centers?
1. Cytochorme b complex.
2. NADH dehydrogenase complex.
3. Succinate dehydrogenase complex.
4. Cytochrome oxidase complex.
Identify the mismatched pair with respect to respiratory quotient (RQ)
Substrates R.Q.
1. Carbohydrates - 1
2. Oxalic acid - 4
3. Proteins - >1
4. Malic acid - 1.33
When electrons flow along the electron transport chains of mitochondria, which of the following changes occur ?
1. The pH of the matrix increases
2. The ATP synthase pumps protons by active transport
3. The electron gain free energy
4. The cytochromes of the chain phosphorylate ADP to form ATP
Which of the following respiratory systems is not closely associated with a blood supply?
1. the lungs of a vertebrate
2. the gills of a fish
3. the tracheal system of an insect
4. the skin of an earthworm