Class 11 Important Questions for Biology - Biochemistry of Cell

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INFOMATICA ACADEMY

Biochemistry of Cell â?– EXERCISE 1. What are carbohydrates? Give the classification of carbohydrates.

2. What are proteins? Describe different biological functions of proteins.

3. Describe different types of lipids. Add a note on their role.

4. What are nucleic acids? Give a brief account of DNA. 5. What are enzymes? State the general properties of enzymes. OR Describe the important properties of enzymes.

6. Write notes on: (i) Monosaccharides

(ii). Derived lipids.

(iii) Simple lipids

(iv) Cellular pool.

7. Give the role of carbohydrates.

OR

What role does carbohydrates play in living body.

8. Give classification of proteins.

9. Describe non genetic RNA types.

10. What is the main role of carbohydrates?

11. How amino acids are linked to form a long chain?

12. What are saturated fatty acids?

13. Why plant fats are liquid at room temperature while animal fats are solid?

14. Why purine: pyrimidine ratio is 1: 1 in DNA, while it is not so in RNA ?

15. What is genetic RNA? 16. What is active site of enzyme?

17. Define: i. Cell

ii. Cellular pool

18. Define metabolism. Explain the parts of metabolism.

19. What are macromolecules ? Give examples.

20. Name two different kinds of metabolism.

21. Write short notes on: a. Monosaccharides

b. Disaccharides

c. Polysaccharides

22. What is the general formula of carbohydrates ?

23. Distinguish between monosaccharide and disaccharides.

24. Differentiate between oligosaccharides and polysaccharides 25. What are the three groups of carbohydrates ?

26. Write a note on the properties of proteins.

27. Explain about the formation of a protein molecule.

28. Name the different amino acids that occur in cell.

F.Y.J.C.

Biochemistry of Cell

CONTACT: 9821131002/9029004242

INFOMATICA ACADEMY 29. Write a note on the properties of proteins.

30. Explain about the formation of a protein molecule.

31. Name the different amino acids that occur in cell.

32. What are lipids? Explain their general properties and composition.

33. How many types of nucleic acid are present in the nucleus?

34. Write the difference between nucleoside and nucleotide.

35. Who proposed the double helix structure of DNA ?

36. Where is DNA located in the eukaryotic cell? What are its functions?

37. Describe the structure of RNA. Also, mention its types.

38. Distinguish between DNA and RNA. 39. Distinguish between m - RNA and r – RNA. 40. Who had coined the term enzyme? Classify enzymes.

41. What are different classes of enzymes?

OR

Give a classification of enzymes with examples.

42. Discuss the mechanism of enzyme action.

43. Describe the factors affecting enzyme activity.

OR

Write a note on factors affecting enzyme activity.

44. Write a note on enzyme inhibitors.

OR

What are non-competitive inhibitors?

45. Define co-factors. Explain it with examples.

46. Write the full form of NADP. 47. Explain the term metabolism 48. Name the two different kind of metabolism. â?– MULTIPLE CHOICE QUESTIONS 1. Most common constituents of organic compounds found in organisms are (A) C, H, O, P

(B) C, H, O

(C) C, H, N, P

(D) C, H, O, N, P

(C) oxygen

(D) all of these

2. Carbohydrates are composed of (A) carbon

(B) hydrogen

3. If a compound contains 2 monosaccharides, then it is described as (A) derived monosaccharide

(C) polysaccharide

(B) disaccharide

(D) pentose sugar

4. The simplest monosaccharide made up of three carbons amongst the following is (A) erythrose

(B) glucose

(C) glyceraldehyde (D) ribose

5. In a disaccharide, monomers are linked with each other through (A) peptide bonds

(C) glycosidic bonds

(B) hydrogen bonds

(D) ester bonds

F.Y.J.C.

Biochemistry of Cell

CONTACT: 9821131002/9029004242

INFOMATICA ACADEMY 6. Deoxyribose sugar is an example of (A) monosaccharide

(C) polysaccharide

(B) disaccharide

(D) simple protein

7. A disaccharide that gives two molecules of glucose on hydrolysis is (A) sucrose

(B) maltose

(C) lactose

(D) none of these

8. Common examples of hexose sugar is/are (A) glucose

(B) fructose

(C) erythrose

(D) both (A) and (B)

9. Which of the following do not give smaller sugar units on hydrolysis?

(A) monosaccharides

(C) polysaccharides

(B) oligosaccharides

(D) glycogen

10. Polysaccharides consists of (A) two monosaccharide units

(C) many monosaccharide units

(B) eight monosaccharide units

(D) amino acids

11. Sugar present in milk is (A) fructose

(B) lactose

(C) galactose

(D) sucrose

12. Which of the following releases lot of energy on its breakdown?

(A) carbohydrate

(B) fat

(C) starch

(D) protein

13. Proteins are linear polymers of (A) amino acids

(C) monosaccharides

(B) fatty acids

(D) nucleic acids

14. Proteins are formed by the condensation of (A) nucleic acids

(B) amino acids

(C) fatty acids

(D) carbohydrates

(B) Cytosine

(C) Thymine

(D) Uracil

(C) fats

(D) proteins

15. Find the odd one (A) Adenine

16. Main constituent of protoplasm is (A) carbohydrates (B) water 17. Protein is (A) micromolecule

(C) soluble

(B) macromolecule

(D) specific

18. Cell membranes are made up of (A) proteins

(C) lipids and proteins

(B) lipids

(D) carbohydrates

19. Fatty acids which do not contain double bond between carbon atoms are (A) saturated fatty acids

(C) oleic and linoleic acids

(B) unsaturated fatty acids

(D) linoleic and linolenic acids

F.Y.J.C.

Biochemistry of Cell

CONTACT: 9821131002/9029004242

INFOMATICA ACADEMY 20. Simple lipids are esters of (A) amino acids

(C) phosphorus

(B) proteins

(D) fatty acids with glycerol

21. The two strands of DNA are (A) similar in nature and complementary (B) anti-parallel and complementary (C) parallel and complementary (D) basically different in nature 22. Nucleotide contains (A) sugar + phosphate

(C) sugar + nitrogenous base

(B) N-base + phosphate

(D) sugar + N-base + phosphate

23. Hair pin like structure is observed in (A) m-RNA

(B) t-RNA

(C) r-RNA

(D) DNA

(B) m-RNA

(C) r-RNA

(D) not specific

24. Smallest RNA is (A) t-RNA

25. Which RNA is present in more amount in the cell?

(A) m-RNA

(B) t-RNA

(C) r-RNA

(D) not certain

26. RNA is genetic material in (A) bacteria

(C) bacteriophages

(B) cyanobacteria

(D) plant viruses

27. The enzyme functions best at temperature (A) 30° to 50° C

(B) 15° to 25° C

(C) 20 to 30° C

(D) 40 to 50° C

(C) lipids

(D) nucleic acids

28. Enzymes are made up of (A) carbohydrate

(B) proteins

29. __________ was the first to isolate urease in pure crystalline form from the Jack bean extract.

(A) W. Kuhne

(B) G. Mendel

(C) J. B. Sumner (D) both (A) and (C)

30. As temperature changes from 30° to 45° C, the rate of enzyme activity will (A) decrease

(C) first increase and then decrease

(B) increase

(D) first decrease and then increase

31. Out of the following, which is not a property of enzyme?

(A) Specific in nature

(C) Used up in reaction

(B) Proteinaceous

(D) Increased rate of biochemical reaction

32. All enzymes are (A) a proteins

F.Y.J.C.

(B) lipids

(C) carbohydrates (D) vitamins

Biochemistry of Cell

CONTACT: 9821131002/9029004242

INFOMATICA ACADEMY 33. At high temperature, enzyme gets.

(A) denatured

(C) slightly activated

(B) killed

(D) inactivated

34. Find out the incorrect one.

(A) All enzymes are specific

(C) All enzymes are proteins

(B) All enzymes are biocatalysts

(D) All proteins are enzymes

35. In which of the following, the ratio of hydrogen and oxygen atoms is 2 : 1?

(A) proteins

(B) fats

(C) oil

(D) carbohydrates

36. Majority of cellular enzymes function best at _________ pH. (A) acidic

(B) basic

(C) neutral

(D) strong base

37. The __________ action of enzyme with a substrate is explained by lock & key theory.

(A) relative

(B) specific

(C) random

(D) abstract

38. __________ catalyze hydrolysis of ester, ether etc.

(A) Lyases

(B) Ligases

(C) Hydrolases

(D) Transferases

39. __________ catalyze interconversions of geometric, optical and positional isomers.

(A) Transferases

(C) Oxidoreductase

(B) Ligeses

(D) Isomerases

40. __________ are also known as dehydrogenases.

(A) Oxidoreductases

(C) Lyases

(B) Ligases

(D) Transferases

â?– ANSWER TO MULTIPLE CHOICE QUESTION 1. (B)

2. (D)

3. (B)

4. (B)

5. (C)

6. (A)

7. (A)

8. (D)

9. (A)

10. (C)

11. (B)

12. (B)

13. (A)

14. (B)

15. (A)

16. (B)

17. (B)

18. (C)

19. (A)

20. (D)

21. (B)

22. (D)

23. (B)

24. (A)

25. (C)

26. (D)

27. (A)

28. (B)

29. (C)

30. (C)

31. (C)

32. (A)

33. (A)

34. (D)

35. (D)

36. (C)

37. (B)

38. (C)

39 (D)

40. (A)

F.Y.J.C.

Biochemistry of Cell