MDCAT SAMPLE BIOLOGY QUESTIONS

Medical and Dental College Admission Test (MDCAT) which is also known as “MCAT” is a standardized Test conducted by the University of Health and Sciences (UHS) in admission Lahore. Pakistan Medical and Dental Council (PM and DC) has directed this two and half i.e (150) minutes paper based test to be held once a year and is mandatory for candidates to be able to take admission in ‘MBBS’ and ‘BDS’ degree programs in all the Private and Public Sector Medical and Dental Institutions.

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TOPIC

Enzymes

QUESTION

Some enzymes require the presence of a non-protein molecule to behave catalytically. An enzymes devoid of this molecule is called a (n)

  • Holo enzyme
  • Apo enzyme
  • Co enzyme
  • Zymo enzyme

CORRECT ANSWER

Apo enzyme

EXPLANATION

An Apo enzyme is an inactive enzyme, activation of the enzyme occurs upon binding of an organic or inorganic cofactor. Holo enzyme is an Apo enzyme together with its cofactor. A Holo enzyme is complete and catalytically active. Most cofactors are not covalently bound but instead are tightly bound.

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:

Transport

Question:

The type of agranulocyte that stays in blood for a few hours and then enters tissue and becomes macrophages is called?

Options:

  • Lymphocytes
  • Monocytes
  • Eosinophil
  • Basophils

Correct Answer:

Monocytes

Explanation:

Monocytes remain in blood for 10-20 hours then enter the tissue and become macrophages performing phagocytic functions.

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