Biomolecules Class 12 MCQ are one of the best strategies to prepare for the CBSE Class 12 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQ on Biomolecules class 12 which will help them all through their board test.
Biomolecules Class 12 MCQ Questions with Answers
Class 12 Chemistry MCQ with answers are given here to chapter the Amines. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 12 Chemistry syllabus. By Solving these Class 12 MCQ, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 12 Annual exam.
Learn Class 12 Biomolecules MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Biomolecules Class 12 MCQ with answers given below.
Question 1. The difference between amylose and amylopectin is
(a) amylopectin have 1 → 4 a-linkage and 1 → 6 a-linkage
(b) amylose have 1 → 4 a-linkage and 1 → 6 b-linkage
(c) amylopectin have 1 → 4 a-linkage and 1 → 6 b-linkage
(d) amylose is made up of glucose and galactose.
Question 2. The function of enzymes in the living system is to
(a) catalyse biochemical reactions
(b) provide energy
(c) transport oxygen
(d) provide immunity.
Question 3. Deficiency of vitamin B1 causes the disease
Question 4. Which one of the following statements is not true regarding (+)–lactose?
(a) On hydrolysis (+)–lactose gives equal amount of D(+)–glucose and D(+)–galactose.
(b) (+)–Lactose is a b-glucoside formed by the union of a molecule of D(+)–glucose and a molecule of D(+)–galactose.
(c) (+)–Lactose is a reducing sugar and does not exhibit mutarotation.
(d) (+)–Lactose, C12H22O11 contains 8 –OH groups.
Question 5. Which of the following hormones contains iodine?
Question 6. Which one given below is a non-reducing sugar?
Question 7. Fructose reduces Tollens’ reagent due to
(a) asymmetric carbons
(b) primary alcoholic group
(c) secondary alcoholic group
(d) enolisation of fructose followed by conversion to aldehyde by base.
Question 8. Number of chiral carbons in b-D-(+) glucose is
Question 9. Which one of the following is a peptide hormone?
Question 10. Which one of the following does not exhibit the phenomenon of mutarotation?
Question 11. Which of the following statements about enzymes is true?
(a) Enzymes catalyse chemical reactions by increasing the activation energy.
(b) Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.
(c) Enzymes lack in nucleophilic groups.
(d) Pepsin is proteolytic enzyme.
Question 12. Enzymes take part in a reaction and
(a) decrease the rate of a chemical reaction
(b) increase the rate of a chemical reaction
(c) both (a) and (b)
(d) none of these.
Question 13. Glycolysis is
(a) oxidation of glucose to glutamate
(b) conversion of pyruvate to citrate
(c) oxidation of glucose to pyruvate
(d) conversion of glucose to haem.
Question 14. RNA and DNA are chiral molecules, their chirality is due to
(a) chiral bases
(b) chiral phosphate ester units
(c) D-sugar component
(d) L-sugar component.
Question 15. Cellulose is polymer of
Question 16. Which of the following gives positive Fehling solution test?
(c) Fats (d) Protein
Question 17. Which one of the following statements is true?
(a) Saponification of oil yields a diol
(b) Drying ofoil involves hydrolysis
(c) Addition of antioxidant to oil minimises rancidity
(d) Refining of oil involves hydrogenation
Question 18. Which base is present in RNA but not in DNA ?
Question 19. Chargaff’s rule states that in an organism
(a) amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C)
(b) amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C)
(c) amount of adenine (A) is equal to that of cytosine (C) and the amount of thymine (T) is equal to that of guanine (G)
(d) amounts of all bases are equal.
Question 20. Lipids are
(a) nucleic acids occurring in plants
(b) proteins occurring in animals
(c) carbohydrates occurring in plants
(d) fats of natural origin
Question 21. Which functional group participates in disulphide bond formation in proteins?
Question 22. The purine base present in RNA is
Question 23. Which one of the following is not present in RNA?
Question 25. The pyrimidine bases present in DNA are
(a) cytosine and adenine
(b) cytosine and guanine
(c) cytosine and thymine
(d) cytosine and uracil
Question 26. There are 20 naturally occurring amino acids.The maximum number of tripeptides that can be obtained is
Question 27. Which of the following is not present in a nucleotide?
Question 28. In both DNA and RNA, heterocylic base and phosphate ester linkages are at
(a) C’5 and C’1 respectively of the sugar molecule
(b) C’1 and C’5 respectively of the sugar molecule
(c) C’2 and C’5 respectively of the sugar molecule
(d) C’5 and C’2 respectively of the sugar molecule
Question 29. How many hydrogen bonds are present between pair of thymine and adenine in DNA ?
(a) 1-hydrogen bond
(b) 2-hydrogen bonds
(c) 3-hydrogen bonds
(d) No bonds occur
Question 30. Which one of the following bases is not present in DNA?
Whoever needs to take the CBSE Class 12 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 12 Chemistry Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Class 12 Amines MCQ Questions with Answers are ready by the subject specialists themselves.
Question 31. In biological systems, the RNA molecules direct the synthesis of specific proteins which are characteristics of each kinds of organism. This process is known as
Question 32. Night-blindness may be caused by the deficiency of vitamin
Question 33. A substance forms Zwitter ion. It can have functional groups
(a) —NH2 , —COOH
(b) —NH2, —SO3H
(c) Both (a) and (b)
(d) None of the above
Question 34. Match the following Columns.
|Column I||Column II|
|A. Vitamin B12||1. Sterility|
|B. Vitamin B6||2. Haemorrhagic Condition|
|C. Vitamin E||3. Pernicious anaemia|
|D. Vitamin K||4. Skin disease|
A B C D
(a) 1 2 3 4
(b) 2 3 4 1
(c) 3 4 1 2
(d) 3 4 2 1
Question 35. Sanger’s method is used to identify
(a) C-terminal amino acid
(b) N-terminal amino acid
(c) side chain
(d) molecular weight protein
Question 36. Helical structure of protein is stablilised by
(a) peptide bond
(b) hydrogen bond
(c) van der Waals’ force
(d) dipole association
Question 37. The chemical name of vitamin B1 is
(a) ascorbic acid
Question 38. a-D-glucose and b-D-glucose are
Question 39. Which of the following is the sweetest sugar?
Question 40. Glucose molecule reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of X is
Question 41. Match the following Columns.
|Column I||Column II|
|A. Vitamin A||1. Scurvy|
|B. Vitamin B12||2. hemorrhagic Condition|
|C. Viitamin C||3. Sterlity|
|D. Vitamin E||4. Xerophthalmia|
|E. Vitamin K||5. Pernicious anaemia|
A B C D E
(a) 3 4 5 2 1
(b) 3 4 5 1 2
(c) 4 5 1 3 2
(d) 3 5 4 2 2
(e) 4 5 3 1 2
Question 42. Which of the following compounds is not of the lipid series ?
Question 43. The oxidation of glucose is one of the most important reactions in a living cell. What is the number of ATP molecules generated in cells from one molecule of glucose?
Question 44. Which one of the following sets of monosaccharides forms sucrose?
(a) a-D-galactopyranose and a-D-glucopyranose
(b) a-D-glucopyranose and b-D-fructofuranose
(c) b-D-glucopyranose and a-D-fructofuranose
(d) a-D-glucopyranose and b-D-fructopyranose
Question 45. In DNA, the linkages between different nitrogenous bases are
(a) phosphate linkage
(c) glycosidic linkage
(d) peptide linkage.
Question 46. The a-D-glucose and b-D-glucose differ from each other due to difference in carbon atom with respect to its
(a) number of OH groups
(b) size of hemiacetal ring
Question 47. The correct statement regarding RNA and DNA, respectively is
(a) the sugar component in RNA is a arabinose and the sugar component in DNA is ribose
(b) the sugar component in RNA is 2′-deoxyribose and the sugar component in DNA is arabinose
(c) the sugar component in RNA is arabinose and the sugar component in DNA is 2′-deoxyribose
(d) the sugar component in RNA is ribose and the sugar component in DNA is 2′-deoxyribose.
Question 48. Which of the following is an amine hormone?
Question 49. Which of the following is a basic amino acid?
Question 50. The segment of DNA which acts as the instrumental manual for the synthesis of the protein is
Question 51. Chemically considering digestion is basically
Question 52. Which of the following compounds can form a zwitter ion?
(c) Benzoic acid
Question 53. The hormone that helps in the conversion of glucose to glycogen is
(b) bile acids
Question 54. The non-essential amino acid among the following is
Question 55. Which structure(s) of proteins remain(s) intact during denaturation process?
(a) Both secondary and tertiary structures
(b) Primary structure only
(c) Secondary structure only
(d) Tertiary structure only
Question 56. Which of the statements about “Denaturation” given below are correct?
(1) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(2) Denaturation leads to the conversion of double strand of DNA into single strand.
(3) Denaturation affects primary structure which gets distorted.
(a) (2) and (3)
(b) (1) and (3)
(c) (1) and (2)
(d) (1), (2) and (3)
Question 57. On hydrolysis of starch, we finally get
(c) both (a) and (b)
Question 58. Which functional group participates in disulphide bond formation in proteins?
l (d) Thiolactone
Question 59. The cell membranes are mainly composed of
Question 60. In a protein molecule various amino acids are linked together by
(a) peptide bond
(b) dative bond
(c) a-glycosidic bond
(d) b-glycosidic bond.
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Frequently Asked Question (FAQs)
How many MCQ questions are there in Cass 12 chapter 14 Chemistry?
In Class 12 chapter 14 Chemistry, we have provided 60 Important MCQ Questions, But in the future, we will add more MCQs so that you can get good marks in the Class 12 exam.
Can we score good marks in Class 12 Chemistry with the help of Biomolecules MCQ Questions?
Yes, MCQ Question is one of the best strategies to make your preparation better for the CBSE Board Exam. It also helps to know the student’s basic understanding of each chapter. So, You can score good marks in the Class 12 Chemistry exam.