Class 12 Chemistry Chapter 14 Biomolecules Objective Type Questions with Answers | Class 12 Chemistry Chapter 14 Biomolecules Quiz

(1) Amino acids are produced from

[A] Proteins

[B] Fatty acids

[C] Essential oils

[D] α-keto acids

Answer: Proteins

(2) In RNA, thymine is replaced by

[A] adenine

[B] guanine

[C] cytosine

[D] uracil

Answer: uracil

(3) Which purine base is found in RNA?

[A] Thymine

[B] Uracil

[C] Cytosine

[D] Guanine

Answer: Guanine

(4) Which of the following nucleotide sequences contains four pyrimidine bases?

[A] GATCAATGC

[B] UAGCGGUAA

[C] GCUAGACAA

[D] both b and c

Answer: GATCAATGC

(5) Cellulose, the most important constituent of plant cell wall is made up of

[A] Branched of glucose molecules linked by β-1, 4 glycosidic bond in straight chain and α-1,6 glycosidic bond at the site of branching

[B] Unbrached chain of glucose molecules linked by β--1,4 glycosidic bond

[C] Branched chain of glucose molecules linked by β-1, 4 glycosidic bond

[D] Branched chain of glucose molecules linked by β-1, 4 glycosidic bond in straight chain and α-1,6 glycosidic bond at the site of branching

Answer: Unbrached chain of glucose molecules linked by β--1,4 glycosidic bond

(6) Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

[A] Enhance oxidative metabolism

[B] Help in regulating metabolism

[C] are conjugated proteins

[D] are exclusively synthesised in the body of a living organism as at present

Answer: Help in regulating metabolism

(7) Number of essential elements in animals are

[A] 16

[B] 18

[C] 20

[D] 25

Answer: 25

(8) Cellular micromoleules are

[A] amino acids, water, minerals, nucleotides and sugar

[B] glycogen, amino acids, minerals and nucleotides

[C] water, minerals, proteins and nucleotides

[D] sugars, water, mineral, nucleotides an d proteins

Answer: amino acids, water, minerals, nucleotides and sugar

(9) The ratio between hydrogen and oxygen in a carbohydrate is

[A] 5:1

[B] 4:3

[C] 3:1

[D] 2:1

Answer: 2:1

(10) Which one is fat soluble vitamin?

[A] vit A

[B] vit D

[C] vit E

[D] All of these

Answer: All of these

(11) A non reducing sugar is

[A] glucose

[B] sucrose

[C] fructose

[D] maltose

Answer: sucrose

(12) Which one is basic amino acid?

[A] proline

[B] arginine

[C] proline

[D] histidine

Answer: arginine

(13) Which of the following protein has storage capacity?

[A] glutenins

[B] myosin

[C] chondrin

[D] keratin

Answer: glutenins

(14) Sweetest sugar is

[A] frucose

[B] glucose

[C] mannose

[D] lactose

Answer: frucose

(15) Which one of the following is a reducing sugar?

[A] galactose

[B] gluconic acid

[C] sucrose

[D] b methyl galctoside

Answer: galactose

(16) An organic substance bound to an enzyme and essential for its activity is called

[A] isoenzyme

[B] coenzyme

[C] holoenzyme

[D] apoenzyme

Answer: coenzyme

(17) Which of the following mineral element facilitates insulin binding to cell receptor site?

[A] Zinc

[B] Selenium

[C] Copper

[D] Chromium

Answer: Chromium

(18) Which of the following is a folate analog?

[A] Methotrexate

[B] Carnosine

[C] Azaserine

[D] Aniserine

Answer: Methotrexate

(19) Histamine is a potent secretagogue of

[A] Amylase by the salivary gland

[B] HCI by the stomach

[C] Gastrin by the stomach

[D] NAHCO3 by the pancreas

Answer: HCI by the stomach

(20) The contraluminal plasma membrane of small intestinal epithelial cells contain

[A] Disaccharidases

[B] Aminopeptidases

[C] GLUT 5

[D] Na+/ K+ ATPase

Answer: Na+/ K+ ATPase

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Class 12 Chemistry Chapter 14 Biomolecules MCQs | Class 12 Chemistry Chapter 14 Biomolecules Objective Type Questions with Answers

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