Match the metabolic process with the correct discription 1. Glycolysis 2. Interm

Question

Match the metabolic process with the correct discription

1. Glycolysis

2. Intermediate/ Prep step

3. Krebs cycle

4. Non-Cyclic photophosphorylation

5.Cyclic photophosphorylation

6. Calvin Cycle

7. Hatch/ Slack Cycle (C-4)

8.Fermentation

A. Alternate light independent photosynthesis reactions; Krebs Cycle in reverse

B. C-3 Cycle that produces glucose

C. Converts pyruvate to acetyl- CoA

D.Incomplete catabolism of glucose that produces alcohol, vinegar or lactic acid

E.Initial step in glucose catabolism

F.Mitochondrial process that produces carbon dioxide, FADH2 and NADH

G. Non-oxygen producing light reaction; occurs in cyanobacteria

H. Oxygen producing light reaction of photosynthesis

Explanation / Answer

1. Glycolysis - E. Initial step in glucose catabolism

Explanation - Glycolysis is the first pathway involved in cellular respiration, to produce energy from glucose.

2. Intermediate/Prep step - C. Converts pyruvate to acetyl-CoA

During glycolysis, glucose is converted into pyruvate. Pyruvate directly cannot enter the Krebs cycle, it has to converted into acetyl-CoA.

3. Krebs cycle - F. Mitochondrial process that produces carbon dioxide, FADH2and NADH.

Krebs cycle occurs inside mitochondria, wherein carbon dioxide is released, and reducing agents such as FADH2and NADH are formed, which can be further used to produce ATP molecules during oxidative phosphorylation.

4. Non-cyclic photophosphorylation - H. Oxygen producing light reaction of photosynthesis

It involves the light dependent reactions of photosynthesis occurring in plants; wherein both photosystem I (PSI) and II (PSII) are involved. Electrons from PSI are accepted by NADP, which then enters Calvin cycle. It produces ATP as well as NADPH.

5. Cyclic photophosphorylation - G. Non-oxygen producing light reaction; occurs in cyanobacteria

It involves the light dependent reactions of photosynthesis that occurs in bacteria; only photosystem I is involved. Electrons travel back to PSI, resulting in a cyclic chain of reactions. Only ATP is produced.

6. Calvin cycle - B. C3 cycle that produces glucose

Calvin cycle forms the light independent reactions of photosynthesis for fixation of carbon dioxide into carbohydrates.

7. Hatch/ Slack cycle - C4 cycle - A. Alternate light independent photosynthesis reaction, Krebs cycle in reverse

It is the pathway for carbon fixation occurring in a small subset of plants, called C4 plants. It is called C4, since the first product in the pathway is a 4-carbon molecule instead of 3-carbon molecule (C3 cycle) in most plants.

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