OBJECTIVES Of Harvest Energy Stored In Nutrients

Multiple Choice Questions MCQs:

Four options are given at the end of each statement. You should encircle.one option from them.

  1. The first step of respiration is:

(a) ETC            (b) Krebs cycle          (c) Glycolysis              (d) Fermentation

  1. The end product of glycolysis is:

(a) Citric acid (b) PAGL                      (c) Phosophoenol (d) Pyruvate

  1. The enzyme which control the phosphorylation of glucose is:

(a) Mutase        (b) Hexokinase          (c) Lipase                    (d) Lactase

  1. The total number of ATP produced during glycolysis is:

(a) 2                  (b) 4                           (c) 3                             (d) 6

  1. The total number of ATP used during glycolysis is:

(a) 2                  (b) 4                           (c) 3                             (d) 6

  1. The end product of fermentation in higher animals is:

(a) Alcohol        (b) Lactic acid            (c) Pyruvate           • (c) Oxaloacetate

  1. Which of the following molecule is used during fermentation?

(a) ATP             (b) NADH              • (c) NAD                         (d) FADH

  1. Which of the following molecule is produced during fermentation?

(a) ATP             (b) NADH                   (c) NAD                       (d) FADH

  1. Which of the following compound is produced during Krebs cycle?

(a) Citric acid (b) PAGL                      (c) Phosophoenol (d) Pyruvate

10.    Which of the following compound enter into Krebs cycle:

(a) Citric acid (b) PAGL                      (c) Acetyl CoA            (d) Pyruvate

11.The mechanism of oxidative phosphorylation is:

(a) ETC            (b) Photosynthesis (c) Chemiosmosis (d) None

12.The net production of ATP from the respiration of one molecule of glucose is:

(a) 34                (b) 36                         (c) 38                           (c) 40

Ans:

1. (c 2. (d) 3. (c) 4. (b) 5. (a) 6. (b) 7. (b) 8. (a) 9 (a) 10. (c)11. (c) 12. ( )

Fill in the blanks

  1. Six-carbon glucose • molecule is broken down into two molecules_______________.
  2. This electron transfer is called an oxidation-reduction reaction, or_______________reaction.
  3. The molecule that accepts electrons is _____________.
  4. The molecule that gives up electrons is._________________.
  5. Some organisms use to keep glycolysis functioning under_________________ conditions.
  6. Obligative anaerobic organisms include certain types of_______________ . These organisms survive only in the complete absence of molecular oxygen.
  7. The pyruvate is entered into Krebs cycle or_______________ cycle.
  8. _______________is a series of reactions in . which •the pyruvate from glycolysis is oxidized to CO2.
  9. The amine group is removed to yield ammonia. This process is called a_______________.
  10. Glucose enters the cell. It is phosphorylated by the enzyme_______________.

Ans:

1. hexokinase                       2. pyruvate                             3. redox

4. reduced                             5. oxidized                             6. anaerobic

7. bacteria                             8. citric acid                           9. Krebs cycle

10. deamination

Short Questions

  1. Differentiate between aerobic and anaerobic respiration.

Ans: Aerobic respiration takes place in the presence of free oxygen. Anaerobic respiration takes place in the absence of free oxygen. This process called fermentation.


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  1. Differentiate between oxidation and reduction.

Ans: The molecule that gives up electrons is oxidized. Thus, oxidation is the loss of electrons. The molecule that accepts electrons is reduced. Thus. reduction is the gain of electrons.

  1. What are Obligative anaerobic?

Ans: Obligative anaerobic organisms include certain types of bacteria. These organisms survive only in the complete absence of molecular oxygen.

  1. What are Facultative anaerobic?

Ans: Facultative anaerobic organisms and tissues include certain bacteria, yeasts, and cells. These organisms can ferment nutrients in absence of oxygen. It also generates some ATP.

  1. Name the electron carrier used in Krebs cycle.

Ans: Nicotinamide adenine dinucleotide (NAD) and Flavin adenine dinucleotide (FAD).

  1. What is electron transport chain?

Ans: The collection of molecules embedded in the inner membrane of the mitochondrion is called electron transport chain.

  1. What is deamination?

Ans: The amine group is removed to yield ammonia. This process is called a deamination.

True/ False                  (For Punjab University only)

Marks are True or False statement. Give correct statement if false                ‘

Statement

  1. 20 molecules of ATP is produced during oxidation of one molecule of

.           glucose.

  1. The amine group is removed to yield ammonia.
  2. ”acultative anaerobic organisms and tissues include certain bacteria, beasts, and cells.
  3. Obligative anaerobic organisms include certain types of bacteria.
  4. One of the main controlling points in aerobic respiration is the enzyme phosphofructokinase.
  5. The anabolic pathway synthesizes amino acid from an intermediate in the Krebs cycle.
  6. The net result is the conversion of citrate to its isomer isocitrate.

Ans:

 
Statement T/F Correct Statement
  1. 30 molecules of ATP is produced du ing oxidation of one molecule of glucose.
F 36 molecules of ATP is produced during oxidation of one molecule of glucose.
  1. The amine group is removed to yield anmonia.
T
  1. Facultative anaerobic organisms and tissues include certain bacteria, yeasts, and cells.
T  
  1. Obligative anaerobic organisms include certain types of human.
F Obligativ     anaerobic

organisms include certain types of bacteria.

  1. One of the main controlling points in ae obic respiration is the enzyme phosphofructokinase.
T  
  1. The anabolic pathway synthesizes arr ino acid from an intermediate in the Krebs cycle.
T  
  1. The net result is the conversion of citrate to its isomer isocitrate.
   

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