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

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Questions
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

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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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