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Which of the following enzymes functions at the lowest pH?

A.

Trypsin

B.

Pancreatic amylase

C.

Pepsin

D.

Salivary amylase

Answer and Explanation

The Correct Answer is C

A. Trypsin functions in the small intestine, where the environment is slightly alkaline. Therefore, this enzyme does not function at a low pH.

B. Pancreatic amylase also functions in the small intestine, where the pH is neutral to slightly alkaline.

C. Pepsin functions in the stomach, where the environment is highly acidic (pH 1.5 to 2). Pepsin is the correct answer because it works optimally at this low pH.

D. Salivary amylase functions in the mouth, where the pH is neutral or slightly alkaline.


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Related Questions

Correct Answer is C

Explanation

A. While in a secondary follicle: The ovum completes meiosis only after fertilization, not while in a secondary follicle.

B. While in a primary follicle: The ovum is arrested in prophase I of meiosis while in a primary follicle. Meiosis is not completed until fertilization.

C. During fertilization: The ovum completes meiosis II during fertilization, which is when the second meiotic division is completed.

D. During implantation: Meiosis is not completed during implantation. It is completed at fertilization.

Correct Answer is A

Explanation

A. Renal corpuscle: Blood plasma is filtered in the renal corpuscle, which includes the glomerulus and Bowman's capsule.

B. Renal capsule: The renal capsule is the outer protective layer of the kidney and does not filter blood plasma.

C. Renal tubule: The renal tubule is involved in reabsorption and secretion, not in the initial filtration of blood plasma.

D. Renal column: The renal column is a structural part of the kidney, not involved in filtering blood plasma.

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