Question

(1)  One major kind of metabolic process is termed catabolic (catabolism). This process is _______­­­­­­­­­_________ and is __________________.

(A)  involved in breakdown and digestion; energy releasing (exergonic)

(B)  involved in breakdown and digestion; energy requiring (endergonic)   

(C)  involved in synthesis and building; energy releasing (exergonic)

(D)  involved in synthesis and building; energy requiring (endergonic)

(2)  Metabolic pathways  

(A)  involve intermediates                              (B) can be linear, branched, or cyclic   

(C)  consist of multiple steps                          (D)  all of the above

(3)  In your readings, you saw that cellular aerobic respiration has three major sub pathways. The sub pathway that results in the cleavage of glucose into two smaller units is called…

(A)  the citric acid cycle (the Krebs cycle)     (B)  the light dependent reactions     

(C)  glycolysis                                                (D)  the light independent reactions(

Answer 1

1. A

2. D

Metabolism is the sum total of all the reactions occurring inside the living system. It includes both catabolic and anabolic process. This pathways can be simple linear pathway or even cyclic. All the pathways are interconnected to each other giving rise to a complex metabolic pathway.

3. C

Glycolysis in the process of breakdown of one molecule of glucose into two molecules of pyruvic acid. It is a common step for aerobic and anaerobic respiration. It occurs in both prokaryotes and eukaryotes. It takes place in cytoplasm of all the cells.

Citric acid cycle is the process of breakdown of acetyl coenzyme a into carbon dioxide and water.

Light reaction are the part of photosynthesis which result in the formation of ATP which is used by light independent reactions taking place in stroma for the formation of sugars.

4. C

Acetyl coenzyme a is a two carbon compound which condenses with oxaloacetic acid which is a four carbon compound to form a six carbon compound called as citric acid. This is the first step of citric acid cycle which take place in mitochondrial matrix.

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