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Biomolecules MCQs | Biomolecules Multiple Choice Questions (MCQs) with Answers

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Free download in PDF Biomolecules Multiple Choice Questions (MCQs) with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>

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(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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