SINDH MDCAT PAPER 2023

SINDH MDCAT 2023 ( PART 4 )

1. Which of the following describes coral reefs used by Hakeem in preparing eastern medicines?

 
 
 
 

2. Evolutionary progress towards formation of organ system in Cnidarians includes development of enteron and

 
 
 
 

3. What is the optimum pH of pepsin in the stomach?

 
 
 
 

4. At equilibrium, a scientist added more substrate and observed an increase in the rate of the reaction, which soon declined. H e added some more substrate, but this time the rate of the reaction remained unaffected. What was the reason?

 
 
 
 

5. Penicillin blocks the active sites of an enzyme that many bacteria use in making cell wall. It is an example of

 
 
 

6. The structure of an enzyme is altered by:

 
 
 
 

7. Chemical substance that can react with an enzyme faster than real substrate and without produce a product is:

 
 
 
 

8. Which of the following is a good evidence of an evolutionary pathway leading from reptiles to birds?

 
 
 
 

9. The evolution of birds has long been a difficult issue for biologists until the discovery of the Archaeopteryx fossil in 1861. Thus ancient bird exhibited teeth, a long tail containing 20 vertebrae and wings with moveable finger and claws. In the light of the mentioned facts who were the ancestors of the birds?

 
 
 
 

10. The artificial selection in breeding provides a strong evidence for evolution. What does this term mean?

 
 
 
 

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