NUMS MDCAT Past Paper Dated: 2021

21- “Ball and socket” joint is present at:

A. Shoulder
B. Wrist
C. Elbow
D. Knee

Answer : A. Shoulder

22- Which human body function is NOT controlled through negative feedback mechanism?

A. Body temperature
B. Glucagon production
C. Labor contraction
D. Parathyroid activity

Answer : C. Labor contraction

23- Gray matter of spinal cord does not contain:

A. Cell bodies of sensory neurons
B. Cell bodies of interneurons
C. Axons of interneurons
D. Cell bodies of motor neurons

Answer : A. Cell bodies of sensory neurons

24- In term of enzyme action, maximum temperature refers to a temperature at which?

A. Enzymes start to denature
B. Enzymes start to re-nature
C. Enzymes work best
D. Enzymes are reactivated

Answer : A. Enzymes start to denature

25- In enzymatic activity, the term “feedback inhibition” is used when:

A. Enzyme is inhibited by the product being produced
B. Enzyme works normally for regulatory mechanism
C. Enzyme remains unaffected by product concentration
D. Enzyme is inhibited irreversibly

Answer : A. Enzyme is inhibited by the product being produced

26- The chemical which regulates the enzymatic activity is:

A. Activator
B. Inhibitor
C. Substrate
D. Both A and B

Answer : D. Both A and B

27- At temperature higher than optimum, enzymatic activity decreases because of:

A. Saturation
B. Inhibition
C. Denaturation
D. Composition

Answer : C. Denaturation

28- Which of the following ideas was not part of Charles Darwin’s theory of evolution by natural selection?

A. Organisms produce more off springs than the environment can support
B. Variation between individuals arises by gene mutation
C. Only those individuals best adapted by environment survive and reproduce
D. Individuals compete for scarce resources

Answer : B. Variation between individuals arises by gene mutation

29- Evolution of kiwi, food of modern horse, webbed feet of duck, and loss of teeth in whale were all explained in detail by:

A. Lamarck
B. Darwin
C. Weismann
D. De Vries

Answer : A. Lamarck

30- Which of the following is NOT TRUE about interferons?

A. Secrete interleukin
B. Activate immune cells
C. Activate natural killer cells
D. Belong to cytokines

Answer : A. Secrete interleukin

31- Intrinsic factor secreted by parietal cells of stomach mucosa helps in:

A. Vitamin B12 absorption
B. Protein digestion
C. Bowel movement
D. Carbohydrate breakdown

Answer : A. Vitamin B12 absorption

32- Major volume of gastric juices is produced in stomach by:

A. Smell of food
B. Sensation of taste
C. Presence of protein food in stomach
D. Sight of food

Answer : C. Presence of protein food in stomach

33- Which one is NOT a metabolic role of liver?

A. Gluconeogenesis
B. Glycogenolysis
C. Deamination
D. Immunoglobulin synthesis

Answer : D. Immunoglobulin synthesis

34- The enzyme which is NOT produced by the pancreas during digestion is:

A. Lipase
B. Trypsin
C. Pepsin
D. Amylase

Answer : C. Pepsin

35- The heart chamber from where the aorta originates is the:

A. Left ventricle
B. Right ventricle
C. Left atrium
D. Right atrium

Answer : A. Left ventricle

36- Lymphatic system contains all of the organs/structures except:

A. Lymphoid masses
B. Lymph vessels
C. Spleen
D. Lungs

Answer : D. Lungs

37- The smaller (40S) of ribosome combines with larger subunit (60S) in the presence of Mg ion to form ______ particle.

A. 70 S
B. 80 S
C. 90 S
D. 100 S

Answer : B. 80 S

38- The natural bacterial flora is beneficial to humans because they:

A. Interfere with pathogenic colonization
B. Develop resistance against antigens
C. Produce antibiotic against pathogens
D. Develop resistance against physical agents

Answer : A. Interfere with pathogenic colonization

39- In bacteria, the resistance against heat is provided by:

A. Granules
B. Cysts
C. Spores
D. Plasmids

Answer : C. Spores

40- These hormones perform antagonistic function EXCEPT:

A. Calcitonin – Parathyroid
B. Growth Hormone – Somatostatin
C. Adrenaline – Noradrenaline
D. Insulin – Glucagon

Answer : C. Adrenaline – Noradrenaline

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