Students are advised to practice the NCERT MCQ Questions for Class 12 Chemistry Chapter 14 Biomolecules with Answers Pdf free download is available here. MCQ Questions for Class 12 Chemistry with Answers are prepared as per the Latest Exam Pattern. Students can solve these Biomolecules Class 12 MCQs Questions with Answers and assess their preparation level.
Biomolecules Class 12 MCQs Questions with Answers
Solving the Biomolecules Multiple Choice Questions of Class 12 Chemistry Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Biomolecules Class 12 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 14 Chemistry Class 12 and cross-check your answers during preparation.
Question 1.
The linkage which holds various amino acid units in primary structure of proteins is
(a) glycosidic linkage
(b) hydrogen bond
(c) peptide linkage
(d) ionic bond
Answer
Answer: (c) peptide linkage
Question 2.
Vitamin A is called
(a) Ascorbic acid
(b) Retinol
(c) Calciferol
(d) Tocoferol
Answer
Answer: (b) Retinol
Question 3.
The deficiency of vitamin B1 causes which disease?
(a) Beriberi
(b) Rickets
(c) Anaemia
(d) Xerosis
Answer
Answer: (a) Beriberi
Question 4.
Deficiency of vitamin C causes
(a) Scurvy
(b) Rickets
(c) Anaemia
(d) None of these
Answer
Answer: (a) Scurvy
Question 5.
An example of non-reducing sugar is
(a) Sucrose
(b) Lactose
(c) Maltose
(d) None
Answer
Answer: (a) Sucrose
Question 6.
Which of the following is not an essential amino acid?
(a) Glycine
(b) Lysine
(c) Phenyl alanine
(d) Valine
Answer
Answer: (a) Glycine
Question 7.
Which of the following is a water-soluble vitamin?
(a) Vitamin E
(b) Vitamin K
(c) Vitamin B
(d) Vitamin A
Answer
Answer: (c) Vitamin B
Question 8.
Vitamin B1 is
(a) Riboflavin
(b) Cobalamin
(c) Thiamine
(d) Pyridoxine
Answer
Answer: (c) Thiamine
Question 9.
Which is sweetest of the following:
(a) Sucrose
(b) Glucose
(c) Fructose
(d) Maltose
Answer
Answer: (c) Fructose
Question 10.
Rickets may be caused by the deficiency of which vitamin?
(a) Vitamin D
(b) Vitamin C
(c) Vitamin A
(d) Vitamin B
Answer
Answer: (a) Vitamin D
Question 11.
The function of enzymes in the living system is to
(a) Maintain pH
(b) Catalyse biochemical process
(c) provide immunity
(d) transport oxygen
Answer
Answer: (b) Catalyse biochemical process
Question 12.
The disaccharide present in milk is
(a) sucrose
(b) maltose
(c) lactose
(d) cellulose
Answer
Answer: (c) lactose
Question 13.
Which base is present in RNA but not in DNA?
(a) Uracil
(b) Cytosine
(c) Guanine
(d) Thymine
Answer
Answer: (a) Uracil
Question 14.
In aqueous solution, an amino acid exists as
(a) cation
(b) anion
(c) dianion
(d) zwitterion
Answer
Answer: (d) zwitterion
Question 15.
Which of the following is stored in liver of animals?
(a) Amylose
(b) Cellulose
(c) Amylopectin
(d) Glycogen
Answer
Answer: (d) Glycogen
Question 16.
Which of the following is a polysaccharide?
(a) Maltose
(b) Sucrose
(c) Fructose
(d) Cellulose
Answer
Answer: (d) Cellulose
Question 17.
The Vitamin responsible for the coagulation of blood is:
(a) Vitamin B1
(b) Vitamin D
(c) Vitamin K
(d) Vitamin C
Answer
Answer: (c) Vitamin K
Question 18.
Which one is the complimentary base of adenine in one strand to that in the other strand of DNA?
(a) Cytosine
(b) Guanine
(c) Uracil
(d) Thymine
Answer
Answer: (d) Thymine
Question 19.
Ribose is a
(a) monosaccharide
(b) polysaccharide
(c) polypeptide
(d) disaccharide
Answer
Answer: (a) monosaccharide
Question 20.
In which of the following order base, phosphate and sugar are arranged in the nucleotide of DNA?
(a) Base-phosphate-sugar
(b) Base-sugar-phosphate
(c) Phosphate-base-sugar
(d) Sugar-base-phosphate
Answer
Answer: (b) Base-sugar-phosphate
Assertion and Reason Type Questions
The questions given below consist of an assertion and a reason. Use the following key to choose the appropriate answer.
(a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
(b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
(c) Assertion (A) is correct, Reason (R) is wrong statement.
(d) Assertion (A) is wrong, but Reason (R) is correct statement.
Question 21.
Assertion: D (+) – Glucose is dextrorotatory in nature.
Reason: ‘D’ represents its dextrorotatory nature.
Answer
Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.
Question 22.
Assertion: Vitamin D can be stored in our body.
Reason: Vitamin D is fat-soluble vitamin.
Answer
Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
Question 23.
Assertion: ß-glycosidic linkage is present in maltose,
Reason: Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
Answer
Answer: (d) Assertion (A) is wrong, but Reason (R) is correct statement.
Question 24.
Assertion: All naturally occurring α-aminoacids except glycine are optically active.
Reason: Most naturally occurring amino acids have L-configuration.
Answer
Answer: (b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
Question 25.
Assertion: Deoxyribose, C5H10O4 is a carbohydrate.
Reason: Carbohydrates are hydrates of carbon so compounds which follow Cx(H2O)y formula are carbohydrates.
Answer
Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.
Question 26.
Assertion: Glycine must be taken through diet.
Reason: It is a non-essential amino acid.
Answer
Answer: (d) Assertion (A) is wrong, but Reason (R) is correct statement.
Question 27.
Assertion: In the presence of enzyme, substrate molecule can be attacked by the reagent effectively.
Reason: Active sites of enzymes hold the substrate molecule in a suitable position.
Answer
Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
Question 28.
Assertion: The two strands in double strand helix structure of DNA are complementary to each other.
Reason: Disulphide bonds are formed between specific pairs of bases.
Answer
Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.
Question 29.
Assertion: Glucose reacts with hydroxylamine to form an oxime and also adds a molecule of hydrogen cyanide to give cyanohydrin.
Reason: The carbonyl group is present in the open chain structure of glucose.
Answer
Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
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