Biomolecules
MHTCET Exam-Biology-Chapter-1
Sample MCQ (50 Questions)
Q-1 Which of the following is a dlsaccharide?
(a) Ribose (b) Cellulose (c) Maltose (d) Glucose
Q-2 Levulose present in honey is a…
(a) disaccharide (b) glucose (c) fructose (d) pentose
Q-3 Cellobiose, a disaccharide is formed from the hydrolysis of ..
(a) starch (b) glycogen (c) cellulose (d) raffinose
Q-4 Starch and cellulose are the compounds of many units of…
(a) amino acids (b) glycerol
(c) simple sugar (d) fatty acids
Q-5 Glycosidic linkage at place of branching in starch and glycogen is…
(a) a-1 ® 6 (b) a-1 ® 4 (c) b-1 ® 4 (d) b-1 ® 6
Q-6 A heteropolysaccharide is …
(a) glycogen (b) starch (c) cellulose (d) chitin
Q-7 Which one is a homopolysaccharide?
(a) Starch (b) Cellulose
(c) Glycogen and inulin (d) All of these
Q-8 Chitin is a structural polysaccharide which is polymerised from….
(a) N-acetylglucosamine (b) glucose
(c) deoxyribose (d) None of these
Q-9 The molecule given below is
(a) glucose (b) fructose (c) sucrose (d) galactose
Q-10 Lactose is a disaccharlde of ….
(a) glucose and fructose (b) glucose and glucose
(c) glucose and galactose (d) galactose and galactose
Q-11 The components of cane sugar are …
(a) glucose and fructose (b) fructose and galactose
(c) fructose and ribose (d) glucose and glucose
Q-12 Reducing sugar …
(a) can reduce Cu2+ to Cu+ (b) have a free keto group
(c) have a free aldehyde group (d) All of the above
Q-13 The cellular micromolecules are ….
(a) amino acids, water, minerals, nucleotides and sugar
(b) glycogen, amino acids, minerals and nucleotides
(c) water minerals, nucleic acids, amino acids and nucleotides
(d) sugars, water, minerals, proteins and nucleotides
Q-14 Match the following columns.
| Column I | Column II |
| A. Monosaccharides | 1. Starch, chitin |
| B, Oligosaccharide | 2. Raltinose, sucrose |
| C. Polysaccharide | 3. Glucose, fructose |
(a) A-1 B-2 C-3 (b) A-3 B-2 C-1
(c) A-1 B-3 C-2 (d) A-3 B-1 C-2
Q-15 Which of the following statements are correct?
I. Monosaccharides are the simplest carbohydrates.
II. Hydrolysis of oligosaccharides gives three to nine monosaccharide units.
III. Hydrolysis of polysaccharides give 10-15 monosaccharide units.
IV. Polysaccharides, on hydrolysis yield many oligosaccharide units.
Choose the correct option.
(a) Only I (b) Only III .
(c) I and II (d) I and III
Q-16 Each molecule of fat has
(a) one glycerol molecule
(b) one fatty acid molecule
(c) one glycerol molecule and three fatty acid molecules
(d) All of the above
Q-17 Which of the following is a saturated fatty acid?
(a) Stearic acid (b) Oleic acid
(c) Linoleic acid (d) Linolenic acid
Q-18 Fatty acids contain …
(a) greater proportion of oxygen than in carbohydrates
(b) no oxygen
(c) equal oxygen in comparison to carbohydrates
(d) less oxygen than that of carbohydrates
Q-19 The most abundant protein in the whole of the biosphere is
(a) collagen (b) insulin (c) trypsin (d) RuBisCO
Q-20 Which of the following are water soluble protein?
(a) Globulins (b) Albumins (c) Albuminoids (d) Prolamins
Q-21 Which of the following is a conjugated protein?
(a) Mucin (b) MHC (c) Immunoglobulins
(d) All of the above
Q-22 The example of scleraprotein are …
(a) keratin (b) fibroin (c) Both (a) and (b) (d) None of these
Q-23 The contractile protein in the human body is…
(a) actin (b) myosin (c) tubulin (d) All of these
Q-24 Primary structure of protein is due to…
(a) hydrogen bonds (b) peptide bonds
(c) S — S linkage (d) ionic bonds
Q-25 A peptide chain assumes secondary structure through the formation of
(a) interchain ionic bond
(b) interchain hydrogen bond
(c) peptide chain with peptide bonds only is a secondary structure itself
(d) None of the above
Q-26 In a-helix secondary structure, hydrogen bonds lie between amide group of one amino acid and carbonyl group of
(a) 2nd amino acid (b) 3rd amino acid
(c) 4th amino acid (d) 5th amino acid
Q-27 Which of the b-protein is stable in nature?
(a) b-antiparallel (b) b-parallel
(c) a -Pleated sheet (d) None of these
Q-28 Quaternary structure is found in
(a) simple monomeric proteins
(b) conjugate monomeric proteins
(c) oligoproteins
(d) Both (b) and (c)
Q-29 The enormous diversity of protein molecules is dug to the diversity of (mostly)
(a) R-group of amino acid
(b) amino group of amino acid -
(c) peptide bonds
(d) amino acid sequences within protein molecules
Q-30 A peptide bond formation between two amino acids is accompained by the
(a) loss of water
(b) deamination
(c) addition of water
(d) decarboxylation
Q-31 If all the peptide bonds of a protein are broken down, then what would remain?
(a) Amino acids (b) Peptides
(c) Polypeptides (d) Oligopeptides
Q-32 Match the following columns and choose the correct option.
| Column I | Column II |
| A. Simple Broteins | 1. Glycolipids, lipoproteln |
| B. Conjugated proteins | 2. Albumin, globulin |
| C. Conjugated lipids | 3. Steroids, terpens |
| D. Derived lipids | 4. Haemocyanin, cytochrome |
(a) A-1 B-2 C-3 D-4 (b) A-2 B-4 C-3 D-1
(c) A-2 B-4 C-1 D-3 (d) A-2 B-3 C-1 D-4
Q-33 Which one is diamino monocarboxylic amino acid?
(a) Cystine (b) Lysine (c) Cysteine (d) Aspartic acid
Q-34 Nitrogen bases are
(a) homocyclic (b) heterocyclic
(c) open chain hydrocarbons (d) All of these
Q-35 Which pair amongst the following contain purines?
(a) Cytosine and thymine (b) Adenine and thiamine
(c) Adenine and guanine (d) Cytosine and guanine
Q-36 Nucleoside is composed of
(a) ribose as pentose sugar (b) phosphoric acid
(c) nitrogenous base (d) Both (a) and (c)
Q-37 In nucleoside, nitrogen base is attached to pentose sugar at
(a) carbon-5' (b) carbon-1’ (c) carbon-2’ (d) None of these
Q-38 The DNA molecule in eukaryotes is associated with
(a) histones
(b) protamines
(c) Both (a) and (b)
(d) None of these
Q-39 DNA was first discovered by
(a) Beadle (b) Watson and Crick
(c) Friedrich Miescher (d) Kornberg
Q-40 The percentage of mRNA amongst total RNA of cell is
(a) 0.5-1% (b) 3-5%
(c) 15-20% (d) more than 25%
Q-41 Which pyrimidine base is not the part of RNA structure?
(a) Thymine (b) Uracil (c) Cytosine (d) Guanine
Q-42 What will happen to an enzyme when apoenzyme is separated from cofactor?
(a) Activity will be increased (b) Activity will be lost
(c) Activity will be decreased (d) There will be no change in the activity
Q-43 Which of the following are coenzymes?
(a) NAD, NADP, FAD, FMN (b) Vitamin, Fe, Cu
(c) NADPH2, Ca, Co (d) NAD, K, Co-A
Q-44 Enzyme were discovered for the first time in
(a) Yeast (b) maize (c) bacteria (d) algae
Q-45 The enzyme, which catalyses the formation of glutamine from its substrate, belongs to this category of enzymes.
(a) Ligases (b) Lyases (c) Hydrolases (d) Transferases
Q-46 The protein part of an enzyme is known as …
(a) holoenzyme (b) apoenzyme
(c) isoenzyme (d) All of these
Q-47 Feedback inhibition quite often involves
(a) competitive inhibition (b) irreversible inhibition
(c) allosteric inhibition (d) All of these
Q-48 Which of the following acts as precursor to form the active enzyme?
(a) Aspartate (b) Kinase (c) Glycogen (d) Zymogen
Q-49 Allosteric modulation is due to inhibition action of enzymes by
(a) product (b) competitive inhibition
(c) substrate (d) enzyme
Q-50 Which one of the following carbohydrates is a heteropolysaccharide? (2018)
(a) Cellulose (b) Starch (c) Glycogen (d) Hyaluronic acid
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