SINDH MDCAT 2016 PAPER

1. Sickle cell haemoglobin differs from normal haemoglobin because of a single change in an amino acid: Valine replaces glutamic acid Coding triplets in DNA for glutamic acid are CTT and CGT Coding triplets in DNA for valine are CAA and CAG. Which mRNA codon would produce sickle cell hemoglobin if substituted for the normal mRNA codon?

2. The diagram shows the inheritance of haemophilia in a family:

If daughter 4 married a normal male, what is the probability that their first child would suffer from haemophilia?

3. The below given are the characteristics of which of the following ecosystem?

I. Includes tropical grasslands

II. Rainfall is up to I25cm per year.

III. Dry season is very long

IV. Primary consumers include Zebras. giraffes and elephant etc

V. Euphorbia is an example of its plant life.

4. Enzyme carbonic anhydrase in RBCs help in _____ transportation

5. The tendency of a solution to take up water when separated from pure water by a selectively permeable membrane is called

6. Cranium (a part of the skull) forms the brain box and consist of bones.

7. Which of the followings is the fungal disease?

8. Ribose and ribulose are the example of _____ class

9. Which method of gaining immunity can be described as natural active immunity?

10. During ventricular systole: