MCQ Questions for Class 11 Biology with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Biomolecules Class 11 MCQs Questions with Answers and assess their preparation level.<\/p>\nBiomolecules Class 11 MCQs Questions with Answers<\/h2>\n
Solving the Biomolecules Multiple Choice Questions of Class 11 Biology Chapter 9 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Biomolecules Class 11 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 9 Biology Class 11 and cross-check your answers during preparation.<\/p>\n
I. Select the correct answer from the following questions:<\/span><\/p>\nQuestion 1.
\nGlucose is a
\n(a) Ketose hexose sugar
\n(b) Pyronose pentose sugar
\n(c) Aldose hexose sugar
\n(d) Furanose pentose sugar.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Aldose hexose sugar.<\/p>\n<\/details>\n
\nQuestion 2.
\nLactose molecule is composed of
\n(a) Fructose+Fructose
\n(b) Glucose+Fructose
\n(c) Glucose+Glucose
\n(d) Glucose+Galactose.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Glucose+ Galactose.<\/p>\n<\/details>\n
\nQuestion 3.
\nWhich group contains all polysaccharides?
\n(a) Glycogen, sucrose and maltose
\n(b) Maltose, lactose and sucrose
\n(c) Glycogen, glucose and sucrose
\n(d) Glycogen, cellulose and starch.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Glycogen, cellulose and starch.<\/p>\n<\/details>\n
\nQuestion 4.
\nAmino acids are formed from
\n(a) Proteins
\n(b) Fatty acids
\n(c) Volatile acid
\n(d) \u03b1 < -keto acids.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) \u03b1 < -keto acids.<\/p>\n<\/details>\n
\nQuestion 5.
\nA nucleoside is formed of
\n(a) Phosphate and nitrogen base
\n(b) Pentose sugar and phosphate
\n(c) Pentose sugar, phosphate and nitrogen base
\n(d) Pentose sugar and nitrogen base.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Pentose sugar and nitrogen base.<\/p>\n<\/details>\n
\nQuestion 6.
\nThe most abundant component of a cell is
\n(a) Lipid
\n(b) Protein
\n(c) Water
\n(d) Cellulose<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Water.<\/p>\n<\/details>\n
\nQuestion 7.
\nMaximum amount of iron occures in
\n(a) Proteins
\n(b) Bone cells
\n(c) Leucocytes
\n(d) Erythrocytes.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Erythrocytes.<\/p>\n<\/details>\n
\nQuestion 8.
\nCalcium is required for
\n(a) Blood clotting
\n(b) Bone formation
\n(c) Muscle contraction
\n(d) All of these.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) All of these<\/p>\n<\/details>\n
\nQuestion 9.
\nImmediate source of energy is
\n(a) ATP
\n(b) Glucose
\n(c) NADH
\n(d) Pyruvic acid.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) ATP.<\/p>\n<\/details>\n
\nQuestion 10.
\nAn amino acid without an asymetrical carbon atoms
\n(a) Glycine
\n(b) Threonine.
\n(c) Proline
\n(d) Histidine.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Glycine.<\/p>\n<\/details>\n
\nQuestion 11.
\nThe most abundant protein is
\n(a) Glycine
\n(b) Valine
\n(c) Arginine
\n(d) Collagen<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Collagen.<\/p>\n<\/details>\n
\nQuestion 12.
\nBasic unit of nucleic acid is
\n(a) Pentose sugar
\n(b) Nucleotide
\n(c) Phosphoric acid
\n(d) Nitrogen base.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Nucleotide.<\/p>\n<\/details>\n
\nQuestion 13.
\nThe amino acids which are not synthesized in our body are called
\n(a) Deaminated
\n(b) Non-essential
\n(c) Essential
\n(d) Proteinaceous.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Essential.<\/p>\n<\/details>\n
\nQuestion 14.
\nWhich of the following is a non-reducing sugar?
\n(a) Lactose
\n(b) Glucose
\n(c) Maltose
\n(d) Sucrose.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Sucrose.<\/p>\n<\/details>\n
\nQuestion 15.
\nThe primary structure of a protein is due to
\n(a) ionic bonds
\n(b) hydrogen
\n(c) Peptide bonds
\n(d) S-S linkage<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Peptide bonds.<\/p>\n<\/details>\n
\nQuestion 16.
\nA source of maximum energy in a cell is
\n(a) proteins
\n(b) Vitamins
\n(c) Fats
\n(d) Carbohydrates.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Carbohydrates.<\/p>\n<\/details>\n
\nQuestion 17.
\nStarch is a polymer of a basic unit of starch is
\n(a) Maltose
\n(b) Sucrose
\n(c) Glucose
\n(d) Fructose.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Glucose.<\/p>\n<\/details>\n
\nQuestion 18.
\nGlycogen is a polymer of
\n(a) Galactose
\n(b) Glucose
\n(c) Sucrose
\n(d) Fructose.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Glucose.<\/p>\n<\/details>\n
\nQuestion 19.
\nCellulose occurs in
\n(a) Cell wall
\n(b) Cell membrane
\n(c) Cell interior
\n(d) Tunicates.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Cell wall.<\/p>\n<\/details>\n
\nQuestion 20.
\nProtein\/enzyme is formed by chemically bonding together of
\n(a) Lipases
\n(b) Carbohydrates
\n(c) Amino acids
\n(d) CO2<\/sub><\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Amino acids.<\/p>\n<\/details>\n
\nQuestion 21.
\nThe most diverse molecules in a cell are
\n(a) Carbohydrates
\n(b) Proteins
\n(c) Lipids
\n(d) Mineral salts.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Proteins.<\/p>\n<\/details>\n
\nQuestion 22.
\nBesides having, C,H,O which of the following also contains S and P?
\n(a) Fats
\n(b) Vitamins
\n(c) Carbohydrates
\n(d) Proteins.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Proteins.<\/p>\n<\/details>\n
\nQuestion 23.
\nNatural silk fibre is
\n(a) Polyester
\n(b) Polysaccharide
\n(c) Polyamide
\n(d) Polyacid.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Polyamide.<\/p>\n<\/details>\n
\nQuestion 24.
\nThe enzymes having slightly different molecular structure but similar catalytic reaction are called
\n(a) Coenzyme
\n(b) Holoenzyme
\n(c) Proenzyme
\n(d) Isoenzyme.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Isoenzyme.<\/p>\n<\/details>\n
\nQuestion 25.
\nEnzyme that functions at pH = 2.0 is
\n(a) Lipase
\n(b) Ptyalin
\n(c) Pepsin
\n(d) Trypsin.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Pepsin.<\/p>\n<\/details>\n
\nQuestion 26.
\nEnzymes are polymers of
\n(a) Fatty acids
\n(b) Chromosomes
\n(c) Amino acids
\n(d) Nucleus and ribosomes.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Amino acids.<\/p>\n<\/details>\n
\nII. Fill in the blanks:<\/span><\/p>\nQuestion 1.
\nAll the elements present in a sample of ………….. are also present in a sample of living tissue.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: earth’s crust<\/p>\n<\/details>\n
\nQuestion 2.
\nOne is called the filtrate or more technically, the acid soluble, peol, and the second, the retentate or the acid insoluble ………..<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: fraction.<\/p>\n<\/details>\n
\nQuestion 3.
\nOne ………… and ………… a compound.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: isolates, purifies<\/p>\n<\/details>\n
\nQuestion 4.
\nAmino acids are ……………… containing an amino group and an acidic group as substituents on the some carbon i.e., the \u03b1 < -carbon<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: organic compounds<\/p>\n<\/details>\n
\nQuestion 5.
\nThe …………… and ………… properties of amino acids are essentially of the amino, carboxyl and the ‘R’ functional groups.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: chemical, physical<\/p>\n<\/details>\n
\nQuestion 6.
\n………… are generally water insoluble.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: Lipids<\/p>\n<\/details>\n
\nQuestion 7.
\nSome lipids have ……………. and a ………….. organic compound in them.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: Phosphorous, Phosphorylated<\/p>\n<\/details>\n
\nQuestion 8.
\nWhen found attached to a sugar, they are called …………..<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: nucleosides.<\/p>\n<\/details>\n
\nQuestion 9.
\n………….. are not strictly macromolecules.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: Lipids<\/p>\n<\/details>\n
\nQuestion 10.
\nProteins are ……………<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: polypeptides<\/p>\n<\/details>\n
\nQuestion 11.
\n………….. are long chains of sugars.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: Polysaccharides<\/p>\n<\/details>\n
\nQuestion 12.
\n…………, is a polymer of fructose.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: Insulin<\/p>\n<\/details>\n
\nQuestion 13.
\nAllmost all ………….. are positive.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: enzymes<\/p>\n<\/details>\n
\nQuestion 14.
\nThe most important form of energy currency in living systems is the bond energy in a chemical called ……………. .<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: adenosine triphosphate(ATP)<\/p>\n<\/details>\n
\nQuestion 15.
\nThe living state is a ……………. steady state to be able to perform work.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: non-equilibrium<\/p>\n<\/details>\n
\nIII. Mark the statement true (T) or false (F)<\/span><\/p>\nQuestion 1.
\nBiomacromolecules are polymers. They are made of building blocks which are different.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 2.
\nProteins are heteropolymers made of starch acids.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: False<\/p>\n<\/details>\n
\nQuestion 3.
\nNucleic acids (RNA and DNA) are composed of nucleotides.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 4.
\nEnzyme, are composed of one or several polypeptide chains.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 5.
\nWhen the binding of the chemical shuts off enzyme activity, the process is called inhibition and the chemical is called an inhibitor.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 6.
\nWhen the inhibitor closely resembles the substrate in its mo-lecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 7.
\nAlmost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 8.
\nThe latter constitute degradation and hence are called catabolic pathways.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 9.
\nThe most important form of energy currency in living systems is the bond energy in a chemical called adenosine triphosphate (ATP).<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True.<\/p>\n<\/details>\n
\nQuestion 10.
\nTogether all these chemical reactions are called metabolism.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True<\/p>\n<\/details>\n
\nQuestion 11.
\nThe pitch would be 34\u00c5. The rise perbase pair would be 3.4\u00c5. This form of DNA with the above mentioned salient features is called B-DNA.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True<\/p>\n<\/details>\n
\n.
\nQuestion 12.
\nIn a polysaccharide the individual mono saccharides are linked by a glycosidic bond. This bond is also formed by dehydration.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True<\/p>\n<\/details>\n
\nQuestion 13.
\nIn addition, the long protein chain is also folded upon itself like a hollow wollen ball, giving rise to the secondary structure.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: False<\/p>\n<\/details>\n
\nQuestion 14.
\nOther regions of the protein thread are folded into other forms in what is called the tertiary structure.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: False<\/p>\n<\/details>\n
\nQuestion 15.
\nWe can take any living tissue (a vegetable or a piece of liver etc.) and grind it in trichloroacetic acid (CI13<\/sub> CCOOH<\/sub>) using a mortar and a pestle.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: True<\/p>\n<\/details>\n
\nIV. Match the items of column I with the items of column II<\/span><\/p>\n\n\n\nColumn I<\/td>\n | Column II<\/td>\n<\/tr>\n |
\n(a) Trichloroacetic acid<\/td>\n | 1. Consist of nucleotides only.<\/td>\n<\/tr>\n |
\n(b) Inorganic compounds like<\/td>\n | 2. Uridine and cytidine are nucleotides.<\/td>\n<\/tr>\n |
\n(c) Inorganic elements like<\/td>\n | 3. Polypeptides.<\/td>\n<\/tr>\n |
\n(d) Nucleic acid like DNA and RNA<\/td>\n | 4. CL13<\/sub> CCOOH<\/sub><\/td>\n<\/tr>\n\n(e) Adenosine, guanosine, thymidine<\/td>\n | 5. Cellulose<\/td>\n<\/tr>\n | \n(f) In addition, the long protein chain is also folded upon itself like a hollow<\/td>\n | 6. Wollen ball, giving rise to the tertiary structure.<\/td>\n<\/tr>\n | \n(g) Together all these chemical reactions are called<\/td>\n | 7. is the bond energy in a chemical called adenosine triphosphate (ATP).<\/td>\n<\/tr>\n | \n(h) Proteins are<\/td>\n | 8. sulphate, phosphate.<\/td>\n<\/tr>\n | \n(i) Plant cell walls are made of<\/td>\n | 9. calcium, magnesium.<\/td>\n<\/tr>\n | \n(j) Cotton fibre is<\/td>\n | 10. Includes all enzmes catalysing inter-conversion of optical, geometric or positional isomers.<\/td>\n<\/tr>\n | \n(k) The most important form of energy currency in living systems<\/td>\n | 11. molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.<\/td>\n<\/tr>\n | \n(l) Adult human haemoglobin<\/td>\n | 12. meta bolism<\/td>\n<\/tr>\n | \n(m) The chemical which is<\/td>\n | 13. Cellulose.<\/td>\n<\/tr>\n | \n(n) Isomerares<\/td>\n | 14. Consists of 4 subunits.<\/td>\n<\/tr>\n | \n(o) When the inhibitor closely resembles the substrate in its<\/td>\n | 15. converted into a product called a ‘substrate’<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\nAnswer<\/span><\/summary>\nAnswer:<\/p>\n \n\n\nColumn I<\/td>\n | Column II<\/td>\n<\/tr>\n | \n(a) Trichloroacetic acid<\/td>\n | 4. CL13<\/sub> CCOOH<\/sub><\/td>\n<\/tr>\n\n | | |