Question

Given below are two statements. Statement I - During respiration the respiratory substrate directly unite with oxygen. Statement II - The primary process of respiration consists of removal of hydrogen from the respiratory substrate. In the light of above statements, Select the correct option given below:

• A. Both statement I and statement II are correct.
• B. Both statement I and statement II are incorrect.
• C. Statement I is correct but statement II is incorrect.
• D. Statement I is incorrect but statement II is correct.

Hint:

In respiration the substrate is dehydrogenated and hydrogen then combines with oxygen.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Respiration is a stepwise oxidation of the substrate in which hydrogen is removed and carried by coenzymes.

Step 2: Check Statement I
The respiratory substrate does not directly unite with oxygen.
So Statement I is incorrect.

Step 3: Check Statement II
The primary process is the removal of hydrogen (dehydrogenation) from the substrate, which is the correct description.
So Statement II is correct.

Final Answer:
Statement I is incorrect and Statement II is correct. \[ \boxed{\text{(D) }\text{Statement I is incorrect but statement II is correct.}} \]