Which curve(s) on the graphs may represent the temperature and pH profiles of an

Question

Which curve(s) on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot spring at temperatures of 70^degree C or higher? A) curves 1 and 5 B) curves 2 and 4 C) curves 2 and 5 D) curves 3 and 4 C) curves 3 and 5 Which temperature and pH profile curves on the graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid? A)curves 1 and 4 B) curves 1 and 5 C) curves 2 and 4 D) curves 2 and 5 E) curves 3 and 4 Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? A) catalysis B) metabolism C) anabolism

Explanation / Answer

Answer:

37) Which curve on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70C or higher?

A) Curve 1 and 5

B) Curves 2 and 4

C) Curves 2 and 5

D) Curves 3 and 4

E) Curves 3 and 5 - Correct Answer (Since enzyme is taken from a bacterium that lives in mildly alkaline conditions and hot springs at temperature of 70°C, therefore the enzymes would be functional at these temperature and pH conditions and their optima would lie around these conditions)

38) Which temperature and pH profile curves on the graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?

A) Curves 1 and 4 - Correct Answer (Human enzymes work at normal physiological temperature of around 37°C and enzyme that are present in stomach under acidic conditions would be able to perform well under low pH conditions)

B) Curves 1 and 5

C) Curves 2 and 4

D) Curves 2 and 5

E) Curves 3 and 4

39) Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?

Answer: Catabolism (breakdown of complex molecules into simpler ones)

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