MDCAT XI Biology Biological Molecules Online Test-2

1110

Created on June 10, 2025 By

📚 Test Details

Subject: Biology
Class: 1st year / XI
Chapter Name: Biomolecules or Biological Molecules
Test: 2
Book: Sindh Textbook
Total No. Of MCQs: 50 MCQs
Time Allowed: 50 Minutes

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1 / 50

1. They help in the transportation of lipids in blood plasma

a) Glycolipid

b) Glycoprotein

c) Lipoprotein

d) Nucleoprotein

2 / 50

2. Glycolipids also called Cerebrosoids because they are present in

a) Grey matter

b) White matter

c) Vertebrae

d) Plasma

3 / 50

3. w.o.f is correct

a) The smallest sized RNA consists of only 70 to 90 nucleotides

b) Human contains only 45 different types of tRNA

c) tRNA shows duplex and it has anticodons

d) All

4 / 50

4. mRNA is about ___percent of total RNA

a) 10 to 20

b) 80

c) 3 to 4

d) 90

5 / 50

5. w.o.f is correct regarding helix

a) Upright:made up of deoxy ribose sugars

b) Rung:made up of nitrogenous bases

c) distance between two helix remain same from one end to another

d) All

6 / 50

6. during conversion of ATp into ADp,the energy releases

a) 7.3kcal/mole

b) 31.81 kj/mole

c) Both

d) 7.3kj/mole

7 / 50

7. Both nucleic acids are

a) Linear branched

b) Double stranded branched

c) linear unbranched

d) single stranded unbranched

8 / 50

8. We use aspirin to reduce fever and decrease pain depend on inhibition of

a) Lipid synthesis

b) Prostaglandin synthesis

c) Prostaglandin hydrolysis

d) Steroid synthesis

9 / 50

9. w.o.f regarding Carotenoids is correct

a) It is polyterpene consist of long chain of isoprenoid unit

b) These are pigments producing

c) These are plant pigments

d) All

10 / 50

10. Steroid Nucleus made up of _ C atoms arranged in _ attached rings , _of them are hexagonal and _ is pentagonal in shape

a) 17 , 4 , 2 , 2

b) 17 , 3 , 2 , 1

c) 17 , 4 , 3 , 1

d) 17 , 5 , 3 , 2

11 / 50

11. Double bonds present in isoprenoid

a) One

b) Three

c) Two

d) Double bond is not present in isoprenoid

12 / 50

12. Large and important class of lipids, made of isoprenoid units

a) Terpenes

b) Terpenoids

c) Triglycerides

d) Wax

13 / 50

13. Wax as protective coating found on

a) Stem,stalks,leaves,petals

b) Fur, feathers

c) Fruit skin, animal skin

d) All

14 / 50

14. Stearin formula

a) C₅₇H₁₁₀O₅

b) C₅₇H₁₁₀O₆

c) C₅₇H₁₁₆O₅

d) C₅₇H₁₁₀O₄

15 / 50

15. w.o.f is the function of Phospholipid

a) Regulation

b) cell permeability

c) transport

d) All

16 / 50

16. Person of average size contains approx:16 kg of fat which contain how many kcal of energy

a) 144

b) 14,400

c) 144,000

d) 14,000

17 / 50

17. triglycride is

a) One glycerol+one fatty acid

b) One glycerol+three fatty acids

c) Three glycerol+one fatty acid

d) Three glycerol+three fatty acids

18 / 50

18. w.o.f is functional and structural protein

a) Actin

b) Myosin

c) Gelatin

d) Condrocalein

19 / 50

19. w.o.f is not correct

a) Actin_muscle binding protein

b) Amyloid_work as cell surface protein

c) Titin_provide elastic stabilization of myosin and actin filament

d) Elastin_nails and hair forming protein

20 / 50

20. w.o.f is not an example of globular protein

a) Hormones

b) Enzyme

c) Hemoglobin

d) Myosin in muscles

21 / 50

21. which of the following regarding fibrous protein is not correct

a) Insoluble in water

b) Non crystalline

c) Elastic in nature

d) None

22 / 50

22. In sickle cell anemia only__ Is replaced by __ at __ position

a) Glutamic acid, leucine, 6th

b) Valine, glutamic acid, 6th

c) Glutamic acid, valine, 6th

d) Glutamic acid, threonine, 6th

23 / 50

23. Which of the following is not a pyrimidine base?

a) Cytosine

b) Thymine

c) Guanine

d) Uracil

24 / 50

24. Two chains of insulin are held together by

a) Covalent bond

b) Ionic bond

c) Hydrogen bond

d) Disulphide bond

25 / 50

25. Insulin is composed of 51 AA in two chains, one had _AA and other had _ AA

a) 20 , 31

b) 19, 32

c) 15, 36

d) 21, 30

26 / 50

26. He was the first who determined the sequence of amino acids in a protein molecule

a) Darwin

b) Saurez

c) Sanger

d) Robert hook

27 / 50

27. The protein chain can be broken into small chain of more than 10 AA called

a) Peptide

b) Polypeptide

c) Peptone

d) All

28 / 50

28. There are how many basic amino acids which constitute each type of protein

a) 22

b) 20

c) 160

d) 1000

29 / 50

29. w.o.f regarding protein is correct

a) Most important organic compounds of the cell

b) Carry out virtually all of the cell's activities

c) Constitute major part of the dry weight of the cell

d) All

30 / 50

30. Protein is a

a) greek word which means first rank

b) Latin word which means first rank

c) Greek word which means catalysis

d) Greek word which means nitrogenous Compunds

31 / 50

31. Chitin is functionally comparable to

a) Intermediate filament

b) Keratin protein

c) Desmin protein

d) Glucose

32 / 50

32. chitin is

a) (C₈H₁₃O₄N)n

b) (C₈H₁₂O₅N)n

c) (C₈H₁₃O₄S)n

d) (C₈H₁₃O₅N)n

33 / 50

33. ____ is insoluble in hot water and has a branched chain.

a) Pectin

b) Amylopectin

c) Amylose

d) Pectin

34 / 50

34. Which one of the following in not a triose

a) Glycerose

b) Giyceraldehyde

c) Dihydroxyactone

d) Ribose

35 / 50

35. Carbohydrate also called

a) Sacchrum

b) Saccharide

c) Sugars

d) All

36 / 50

36. High heat of Vaporization plays an important role in

a) Thermoregulation

b) Protect protoplasm against sudden thermal changes

c) It can hold the Water molecules in the vessels

d) All

37 / 50

37. Water has _ has very high heat of Vaporization

a) 574kcal/g

b) 573kcal/kg

c) 574kcal/kg

d) 574cal/kg

38 / 50

38. Heat energy required to raise the temperature of 1gm of that substance by 1C° called

a) High heat of Vaporization

b) Heat capacity

c) High specific heat

d) Heat of evaporation

39 / 50

39. Water flows as protoplasm in cell,as blood in blood vessels, as transporting fluid in the conducting tissues of plants due

a) Cohesion force

b) Cohesive force

c) Both A & B

d) Adhesion force

40 / 50

40. In Heterotrophs during digestion macromolecules broken into monomers by hydrolysis with the help of __ enzymes

a) Hydrolytic

b) Pancreatic

c) Globular

d) Simple

41 / 50

41. Condensation _ energy, hydrolysis___ energy

a) Releases,releases

b) Requires,releases

c) Releases, Requires

d) Requires,requires

42 / 50

42. Macromolecules are polymer of

a) Ions

b) Organic molecules

c) Minerals

d) Monomers

43 / 50

43. The percentage of protein in bacterial cell

a) 18

b) 3

c) 15

d) 6

44 / 50

44. Which of the following molecule has same percentage of chemical composition in bacterial and Mammalian cell

a) Protein

b) DNA

c) Lipid

d) Water

45 / 50

45. Which one the following is not correct:

a) Carbohydrate_Glycosidic linkage

b) Protein_peptide linkage

c) Terpenoids_ester linkage

d) Nucleic acid_phosphoester linkage

46 / 50

46. The elements which are involved in the synthesis of bio molecules are mainly six which includes all of these except

a) Carbon, hydrogen oxygen

b) Potassium

c) Sulphur, nitrogen

d) Phosphorus

47 / 50

47. If the water is evaporated the remaining mass of cell called ___of the cell

a) Diffusion weight

b) Macro molecules

c) Organic compounds

d) Dry weight

48 / 50

48. Which biomolecule is primarily responsible for storing genetic information?

a) Carbohydrates

b) Lipids

c) Proteins

d) Nucleic acids

49 / 50

49. Which of the following is a monosaccharide?

a) Glucose

b) Lactose

c) Starch

d) Sucrose

50 / 50

50. DNA and RNA are made up of repeating units called:

a) Monosaccharides

b) Fatty acids

c) Nucleotides

d) Amino acids

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MDCAT XI Biology Biological Molecules Online Test-2

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