These Biomolecules NEET Questions and Answers are composed by our livemcqs team specially for NEET, AIIMS, and other Medical Entrance aspirants. These Biomolecules NEET Questions and Answers cover all concepts of Chapter 9 of Class 11 Biology. You can download these Questions by clicking the Link “Biomolecules NEET Questions PDF” given below.
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|The Living World||Structural Organisation in Animals|
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|Animal Kingdom||Cell Cycle and Cell Division|
|Morphology of Flowering Plants||Transport in Plants|
A Brief Description About Biomolecules NEET Questions and Answers PDF
|Topic:||Biomolecules NEET Questions|
|Examinations:||NEET, AIIMS, JIPMER|
|Class:||11 (CBSE/NCERT) Biology|
|No of Questions:||100+|
|Question type:||Multiple Choice Question|
|Question Format:||Text & PDF|
|PDF Size:||1 MB|
|Download PDF:||Attached Below|
Biomolecules NEET Questions and Answers
1. Formation of complex substances from simpler compounds is called _______
a) Anabolic pathway
b) Catabolic pathway
c) Degradation pathway
d) Metabolic pathway
2. Those metabolites that are formed during growth phase as a result of energy metabolism are called as ________
a) Primary metabolites
b) Secondary metabolites
c) Tertiary metabolites
d) Quaternary metabolites
3. Which among the following is incorrect about carbohydrates?
a) Carbohydrates derive its name from the hydrates of carbon
b) The general formula of all carbohydrates is Cx(H20)y
c) Carbohydrates are defined as optically active polyhydroxy aldehydes or ketones or the compounds that produce such units on hydrolysis
d) Glyceraldehyde is the smallest carbohydrate
4. Which among the following is incorrect about different saccharides?
a) Polysaccharides are used to store food whereas most of the monosaccharides are used for instantaneous energy
b) Most of the polysaccharides are sweet in taste and therefore are also called sugars
c) Starch can be digested whereas cellulose can’t be digested
d) Saccharides are also classified as ketose and aldose
5. Which among the following is incorrect about fructose and glucose?
a) Fructose is also called as pyranose and it’s a ketose sugar
b) Glucose and fructose can be obtained by hydrolysis of sucrose
c) Both fructose and glucose have the same molecular formula
d) Both of them taste sweet
6. Polysaccharides are formed by _______
a) Glycosidic linkages
b) Peptide linkage
c) Phospho-diester linkage
d) Vanderwaal forces
7. Sucrose is also called as ____
a) Invert sugar
d) Milk sugar
8. Which among the following is incorrect about polysaccharides?
a) Cellulose can’t be digested by mammals unless they contain microbes that digest cellulose in their gut
b) Polysaccharides mainly act as the food storage or structural materials
c) Starch comprises of two forms, namely, amylose (water insoluble) and amylopectin (water soluble)
d) Amylopectin has α-1, 4-linkage and 1, 6-glycosidic linkage
9. Primary storage of food in animals is through _______
10. Which among the following is incorrect about amino acids?
a) Amino acids are those that contain an amine group and a carboxylic group
b) Base on the position of amino group with respect to the carboxylic group, amino groups are classified as α-, β-, γ-, δ- amino acids
c) Proteins on hydrolysis produce α-, β-, γ-, δ- amino acids
d) Amino acids are usually represented by a three letter symbol or a one letter convention
11. Which among the following is incorrect about amino acids?
a) There are 20 naturally occurring amino acids
b) All the amino acids are chiral
c) Amino acids are classified as acidic, basic or neutral based on the relative number of amino and carboxylic groups
d) Amino acids are classified as essential amino acids and non-essential based on whether they are synthesized in the body or not
12. Zwitter ion in aqueous solution is __________
13. Proteins are polymers of amino acids that are connected by __________
a) Peptide linkage
b) Glycosidic linkage
c) Phosphodiester linkage
d) Vanderwaal linkages
14. Which among the following statements is incorrect about classification of protein?
a) Fibrous proteins result when long peptide chains run parallel and are held by hydrogen and sulphide linkages
b) Globular structures result when chain of polypeptide coil around themselves to form a globe like structure
c) Linear structure of amino acids in a polypeptide is called primary structure
d) Collagen is an example of globular protein
15. Tertiary structure of protein is formed by __________
a) Sulphide linkages between different amino acids
b) Multiple chains of polypeptides held together by hydrogen bonds
c) Peptide linkages between two amino acids
d) Hydrogen bond formed by helical or pleated structure
16. Which among the following is incorrect about denaturation?
a) Proteins have a unique structure which might get disrupted with change in pH and temperature
b) Secondary, tertiary and quaternary structure is lost
c) Proteins still retain their characteristics as they don’t lose their primary structure
d) Proteins are stereospecific to many enzymes
17. Which among the following is incorrect about enzymes?
a) Enzymes are proteins or non-proteins that act as bio-catalysts
b) Holoenzymes comprise of a prosthetic group and an apoenzyme
c) Prosthetic group can be either co-factors or co-enzymes
d) Cutting a potato leads to the breakage of bonds in the enzymes present in it
18. Which among the following is incorrect about enzymes?
a) Pepsin helps in breaking of proteins
b) Lipase breaks lipids
c) Amylase breaks vitamins
d) Enzymes have a three dimensional structure and this structure has active sites
19. Which among the following is incorrect about amino acids?
a) Enzymes are named after compounds/ class on which they act and their names end with “-ase”
b) Oxidoreductase reduces few substrates whereas oxidizes few other substrates
c) Enzyme kinetics is governed by Michael-Menden equation
d) Enzymes take part in the reaction and increase the rate of reaction
20. Which among the following does not affect the activity of the enzyme after a particular point?
c) Concentration of substrates
d) Competitive inhibitor
21. Enzymes that link covalent bond between substrates to form a large molecule are called _______
22. Which among the following nucleotide is not present in DNA?
23. Which among the following is incorrect about RNA?
a) RNA is always less stable than DNA because of the two –OH on 1’ and 2’ carbons of oxy ribose
b) RNA has uracil whereas DNA has thymine
c) RNA is single stranded whereas DNA is double-stranded
d) RNA on hydrolysis gives ribose sugar
24. Which among the following is incorrect about RNA?
a) RNA is of 3 types i.e. r-RNA, m-RNA and t-RNA
b) m-RNA carries the code for protein synthesis in terms of three nucleotide bases called codons
c) Each codon will represent a unique amino acid and an amino acid is represented by a unique codon
d) r-RNA synthesis the proteins and t-RNA will recognize the codons
25. Which among the following is incorrect about lipids?
a) These are heterogeneous organic compounds comprising of C, H and O
b) These are water insoluble and release more energy as compared to carbohydrates
c) These also act as water barrier and messenger and are constituents of plant
d) Phospholipids are an example of simple fatty acids
26. What chemical is used to grind tissues for chemical analysis?
c) Hydrofluoric acid
d) Trichloroacetic acid
27. What is the nature of the filtrate after grinding tissue?
28. What is the acid-insoluble fraction of grinded tissue known as?
29. How can we get a theoretical idea about the molecular formula of a compound?
a) Analytical techniques
b) Chemical treatment
c) Biological treatment
30. Which of these cannot be determined by analytical techniques?
a) Probable structure
b) Chemical properties
d) Molecular formula
31. What percentage of the Earth’s crust is Sulphur?
32. Which of these elements is negligible in the human body?
33. Which of these components have the least percentage by weight in the Earth’s crust?
34. What is done to obtain the inorganic substances from tissue?
c) Complete combustion
35. Which of these are not present in every amino acid?
a) Amino group
b) Acidic group
36. An amino acid is a substituted ______
a) carboxylic acid
37. How many amino acids are present in the body?
38. Which of these amino acids do not possess a chiral carbon?
39. What is the simplest amino acid?
40. Which amino acid has a methyl group as R?
41. Which amino acid has a hydroxy methyl group as R?
42. Which of these is an amino acid with pH less than 7?
c) Glutamic acid
43. Which of these is a neutral amino acid?
d) Aspartic acid
44. Which of these amino acids is not aromatic?
45. Which of these statements is not true regarding amino acids?
a) The amino group is ionizable
b) The acidic group is ionizable
c) Structure remains same at different pH
d) Glycine is the simplest amino acid
46. How many carbon atoms does palmitic acid contain?
47. How many carbon atoms does arachidonic acid contain?
48. Glycerol is also known as ______
a) dihydroxy butane
b) methyl butanol
c) trihydroxy propane
d) 3 propanol
49. Which of these makes up the cell membrane?
50. Which nitrogenous base is not found in RNA?
51. A nucleoside consists of _____
a) sugar, phosphate
b) base, phosphate
c) base, sugar
d) base, sugar, phosphate
52. Which of the following acids is used for the chemical analysis of living tissues?
a) Trichloroacetic acid
b) Trifluoroacetic acid
c) Tribromoacetic acid
d) Triiodoacetic acid
53. What are biomolecules?
a) Molecules of quantum mechanics
b) Molecules of Life
c) Molecules related to string theory
d) It is a molecule
54. What is the percentage weight of carbon in the earth’s crust?
55. What is the use of elemental analysis?
a) To add those nutrients in food
b) To find the elemental composition of living tissues
c) To gain confidence
d) To research the unknown
56. Why do we use dry weights for the chemical analysis?
a) Because it is vulnerable
b) Because of water leaks everywhere
c) Because water is not absorbed by chemicals
d) Because different organisms have different water-absorbing capacities
57. What is the other name of α-amino acids?
a) Substituted methanes
b) Substituted alcohols
c) Substituted alkyl halides
d) Substituted carboxylic acids
58. Based on which of the following there are different kinds of amino acids?
a) Nature of R group
b) Nature of amino group
c) Nature of carboxyl group
d) Nature of hydrogen
59. Which of the following is a basic amino acid?
d) Glutamic acid
60. How many carbon atoms are there in palmitic acid?
61. Which of the following is not a nucleotide?
a) Adenylic acid
b) Thymidylic acid
c) Guanylic acid
62. Which of these is a secondary metabolite?
63. Which of these statements is false regarding primary metabolites?
a) They have identifiable functions
b) They play a role in normal physiological processes
c) Secondary metabolites are derived from primary metabolites
d) Lipids are primary metabolites
64. Which of these is a pigment?
65. What are anthocyanins?
66. Which of these is an alkaloid?
67. Codeine is a(n) _____
68. Which of these is a secondary metabolite?
69. Which of these is a primary metabolite?
70. What is abrin?
71. Which of these proteins is a secondary metabolite?
72. Which of these is a lectin?
c) Concanavalin A
73. Vinblastine is a _____
d) Essential oil
74. Which of these secondary metabolites is useful for human welfare?
75. Which of these is not a primary metabolite?
76. Based on which of the following, amino acids are classified?
a) Based on the number of hydrogen
b) Based on the number of carbon atoms
c) Based on the number of ions
d) Based on the number of amino and carboxyl groups
77. Which of the following is a peculiar property of amino acids?
a) Basic nature
b) Acidic nature
c) Ionisable nature
d) Neutral nature
78. How many fractions do we obtain while straining a thick slurry of living tissue through the cheesecloth?
79. What are the primary metabolites?
a) Compounds formed in every kind of cells
b) Compounds present in only plants
c) Compounds formed only in animals
d) Compounds formed only by fungus
80. What are the secondary metabolites?
a) Compounds formed in all kinds of cells
b) Compounds formed only in plants
c) Compounds formed only in animals
d) By-products of the cell
81. Which of the following cells are not responsible for the formation of secondary metabolites?
a) Plant cells
b) Fungal cells
c) Animal cells
d) Bacterial cells
82. Which of the following is not a secondary metabolite?
a) Amino acids
83. Which of the following is not a polymeric substance?
84. Which of the following is an essential oil?
b) Lemongrass oil
85. Mitochondria are rich in which of the following ions?
86. Which of the following is the most abundant element in the cell?
87. Which of the following is incorrect regarding sodium and potassium ions?
a) Responsible for maintenance of extracellular and intracellular fluids
b) Responsible for transmission of electrical impulses
c) Responsible for the maintenance of membrane potential
d) Responsible for nitrogen fixation in animals
88. What is the unit of measurement of weight of biomacromolecules?
89. What is the approximate weight of compounds found in acid soluble pool of grinded tissue?
a) 1,000 – 10,000 Da
b) 2 – 30 Da
c) 18 – 800 Da
d) 6,000 – 50,000 Da
90. Which of these compounds is not present in the acid insoluble fraction of homogenized tissue?
d) Nucleic acids
91. Which of these compounds do not have a molecular weight greater than 10,000 Da?
d) Nucleic acids
92. Micro-molecules of the tissue are also known as ______
a) bio compounds
93. What is the maximum weight of biomolecules?
a) 800 Da
b) 10,000 Da
c) 1000 Da
d) 5000 Da
94. Which of these substances is not polymeric?
b) Nucleic acids
95. The molecular weight of lipids does not exceed _____
a) 5000 Da
b) 1000 Da
c) 10,000 Da
d) 800 Da
96. When tissue is homogenized, the disrupted cell membrane separates in the form of _____
a) solid aggregates
b) lipoprotein complexes
97. What percentage of the total cellular mass is water?
a) 5 – 7
b) 50 – 60
c) 10 – 15
d) 70 – 90
98. What percentage of the total cellular mass is nucleic acids?
a) 1 – 2
b) 50 – 60
c) 5 – 7
d) 20 – 30
99. 10 – 15% of the total cellular mass is ______
a) nucleic acids
100. What percentage of the total cellular mass is carbohydrates?
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