UHS MCAT SAMPLE BIOLOGY QUESTIONS

UHS stands for University of Health Sciences, it is a public university operating from Lahore. It is normally known as best research university with a mission to improve health care facilities in Pakistan. UHS is also a regulatory authority for admissions in Punjab. All those students who want to take admission in medical or dental colleges should appear in MCAT. MCAT test consist of 220 MCQ’s divided into four subjects Physics, Chemistry, Biology and English. MCAT entry test is very difficult and students need to work relay hard in order to secure their admission in public sector.

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TOPIC:

Enzymes

QUESTION:

Some enzymes require a non-protein part of its efficient functioning. This helper non protein part is called?

OPTIONS:

  • Accelerator
  • Cofactor
  • Prosthetic group
  • Apoenzym

CORRECT OPTION:

Cofactor

EXPLANATION:

A cofactor is a non-protein chemical compound or metallic ion that is required for a protein’s biological activity to happen. These proteins are commonly enzymes and cofactor can be considered “helper molecules” that assist in biochemical transformations.

Topic:

Bioenergetics

Question:

How much energy of glucose is converted into ATP during alcoholic and lactic acid fermentation?

Option:

  • 1%
  • 2%
  • 90%
  • 100%

Correct Answer:

2%

Explanation:

Both alcoholic and lactic acid fermentation yield relatively smaller amount of energy from glucose molecule. Only about 2% of energy of glucose is converted into ATP during alcoholic and lactic acid fermentation.

TOPIC

Bio-energetic

QUESTION

What does NADPH2 provides during the dark reactions?

  • Energized electron only
  • H+ only
  • Both Energized electron and H+
  • H2

CORRECT ANSWER

Both Energized electron and H+

EXPLANATOPN

NADPH2 provides Both Energized electron and H+ during the dark reactions. When NADPH2 splits it gives NADP+, 2eand 2H+

Chemical Equation

NADPH2    ======>    NADP+ + 2e+ 2H+

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