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,
1 : What is the primary function of carbohydrates?
A
:
Provides energy
B
:
Act as enzymes
C
:
Regulate process
D
:
Make membrane
2 : What is true about cellulose?
A
:
It is sweet in taste
B
:
It is digestible by human digestive system
C
:
It provides structure support in plants
D
:
It is soluble in water
3 : How will you differentiate between monosaccharaides and polysaccharides?
A
:
Monosaccharaides are single sugars.
B
:
Polysaccharides are sweet in taste
C
:
monosaccharide’s are present in plant cell wall
D
:
Polysaccharides dissolve easily
4 : Which of the following proteins is involved oxygen transport?
A
:
Insulin
B
:
Hemoglobin
C
:
Collagen
D
:
Keratin
5 : How do unsaturated fatty acids differ from saturated fatty acids?
A
:
They have more hydrogen atoms.
B
:
They contain double bonds in their hydrocarbon chains
C
:
They are solids at room temperature.
D
:
They are found only in animal fats.
6 : Which component of an amino acid determinates its unique properties?
A
:
Amino group
B
:
Carboxyl group
C
:
R group (side group)
D
:
Hydrogen group
7 : Which proteins are involved in defense against pathogens?
A
:
Antibodies
B
:
Myosin
C
:
Fibrinogen
D
:
Hemoglobin
8 : Which of the following are the units of most lipids?
A
:
Amino acids
B
:
Fatty acids and glycerol
C
:
Nucleotides
D
:
Simple sugars
9 : Which of the following is NOT a function of proteins?
A
:
Transport oxygen
B
:
Carry genetic information
C
:
Help in digesting food
D
:
Fight against pathogens
10 : Which component make up a nucleotide?
A
:
Sugar, Phosphate, nitrogenous base
B
:
Amino acid, sugar, nitrogenous base
C
:
Protein, sugar, nitrogenous base
11 : Which Nitrogenous base is found in RNA but not in DNA?
A
:
Adenine
B
:
Thymine
C
:
Uracil
D
:
Guanine
12 : Which biomolecule acts as a source of energy?
A
:
Proteins
B
:
Lipids
C
:
Carbohydrates
D
:
DNA
13 : Which biomolecule makes up the largest percentage of the dry mass of protoplasm?
A
:
Nucleic acids
B
:
Proteins
C
:
Carbohydrates
D
:
Lipids
14 : What is the primary function of DNA?
A
:
Energy storage
B
:
Carrying genetic information
C
:
Acting as enzymes
D
:
Heat insulation
15 : Where is RNA primarily located in cells?
A
:
Nucleus and ribosomes
B
:
Mitochondria
C
:
Cell membrane
D
:
Lysosomes
16 : Which one of the following does not contain starch?
A
:
Sugar cane
B
:
Barley
C
:
Maize
D
:
Potatoes
17 : Where are proteins NOT found in cells?
A
:
Cell membrane
B
:
Cytoplasm
C
:
Nucleus
D
:
Ribosomes
18 : What is the role of lipids in cells?
A
:
Energy storage and heat insulation
B
:
Protein synthesis
C
:
Carrying genetic information
D
:
Acting as enzymes
19 : Thousands of amino acids polymerize to form:
A
:
Carbohydrates
B
:
Proteins
C
:
Lipids
D
:
Vitamins
20 : Amino Acids are linked to each other through:
A
:
Hydrogen Link
B
:
Ionic Link
C
:
Gelatin Link
D
:
Peptide Link
21 : Which one is the simplest sugar that can not be hydrolyzed?
A
:
Glucose
B
:
Sucrose
C
:
Starch
D
:
Cellulose
22 : Which one of the following does not contain protein?
A
:
Pulses
B
:
Potatoes
C
:
Beans
D
:
Eggs
23 : The nitrogen present in urea is used by plants to synthesize:
A
:
Sugar
B
:
Proteins
C
:
Fats
D
:
DNA
24 : Which biomolecule is responsible for carrying genetic information to ribosomes?
A
:
DNA
B
:
RNA
C
:
Proteins
D
:
Lipids
25 : When Glucose and Fructose combine they produce:
A
:
Starch
B
:
Cellulose
C
:
Sucrose
D
:
None of these
26 : Which is tasteless?
A
:
Starch
B
:
Glucose
C
:
Fructose
D
:
Sucrose
27 : What type of proteins act as enzymes?
A
:
Structural proteins
B
:
Hormonal proteins
C
:
Transport proteins
D
:
Catalytic proteins
28 : What are lipids soluble in?
A
:
Water
B
:
Alcohol
C
:
Saltwater
D
:
Vinegar
29 : Which fatty acids are solid at room temperature?
A
:
Saturated fatty acids
B
:
Unsaturated fatty acids
C
:
Polyunsaturated fatty acids
D
:
Essential fatty acids
30 : Which one of following is reducing sugar?
A
:
Sucrose
B
:
Glucose
C
:
Starch
D
:
Maltose
31 : Sources of galactose are:
A
:
Fruits
B
:
Rice
C
:
Cotton
D
:
Milk
32 : Chemical formula of fructose is:
A
:
C₁₂H₂₂O₁₁
B
:
C₆H₁₂O₆
C
:
C₄H₁₀
D
:
C₅H₁₂
33 : Which biomolecules are the most abundant in cells?
A
:
Carbohydrates
B
:
Proteins
C
:
Lipids
D
:
Nucleic acids
34 : Which one of the following is crystalline solid?
A
:
Glucose
B
:
Starch
C
:
Cellulose
D
:
Glycogen
35 : What are the building blocks of lipids?
A
:
Glucose and fructose
B
:
Amino acids and glycerol
C
:
Glycerol and fatty acids
D
:
Carbon and oxygen
36 : What percentage of the dry mass of protoplasm is made up of nucleic acids?
A
:
10%
B
:
15%
C
:
18%
D
:
50%
37 : What are proteins made up of?
A
:
Sugars
B
:
Fatty acids
C
:
Amino acids
D
:
Nucleotides
38 : Amino acids which are not prepared by our body are called:
A
:
Non essential
B
:
Proteins
C
:
Essential
D
:
Amino acids
39 : Which type of lipid forms the core of cell membranes?
A
:
Fats
B
:
Oils
C
:
Phospholipids
D
:
Steroids
40 : Which one of the following is disaccharide?
A
:
Glucose
B
:
Fructose
C
:
Sucrose
D
:
Starch
41 : Photosynthesis process produces:
A
:
Starch
B
:
Cellulose
C
:
Sucrose
D
:
Glucose
42 : How many types of amino acids participate in making most proteins?
A
:
10
B
:
15
C
:
20
D
:
25
43 : The most important oligosaccharide is:
A
:
Sucrose
B
:
Glucose
C
:
Fructose
D
:
Maltose
44 : Which protein transports oxygen in the blood?
A
:
Actin
B
:
Myosin
C
:
Haemoglobin
D
:
Collagen
45 : Which lipid is involved in the synthesis of steroid hormones?
A
:
Glycogen
B
:
Cholesterol
C
:
Insulin
D
:
Hemoglobin
46 : Which of the following is a plant source of lipids?
A
:
Beef
B
:
Milk
C
:
Sunflower oil
D
:
Butter
47 : Which vitamins are absorbed with the help of lipids?
A
:
B and C
B
:
A, D, E, and K
C
:
K and B
D
:
E and C
48 : What are the building blocks of nucleic acids?
A
:
Amino acids
B
:
Fatty acids
C
:
Nucleotides
D
:
Glucose molecules
49 : What is the primary function of lipids stored in adipose tissues?
A
:
Hormone production
B
:
Vitamin synthesis
C
:
Long-term energy storage
D
:
Oxygen transport
50 : General formula of carbohydrates is:
A
:
CₙH₂ₙOₙ
B
:
Cₙ(H₂O)ₙ
C
:
Cₙ(OH)ₙ
D
:
None of these
51 : Which protein helps in blood clotting?
A
:
Insulin
B
:
Haemoglobin
C
:
Fibrin
D
:
Collagen
52 : Which side group is present in alanine?
A
:
H
B
:
CH₃
C
:
NH₂
D
:
COOH
53 : Which proteins are responsible for muscle contraction?
A
:
Collagen and keratin
B
:
Actin and myosin
C
:
Fibrin and insulin
D
:
Haemoglobin and antibodies
54 : Which sugar is found in DNA?
A
:
Ribose
B
:
Glucose
C
:
Fructose
D
:
Deoxyribose
55 : Which base pairs with adenine in DNA?
A
:
Cytosine
B
:
Thymine
C
:
Guanine
D
:
Uracil
56 : Which type of RNA carries amino acids to the ribosomes?
A
:
mRNA
B
:
rRNA
C
:
tRNA
D
:
cRNA
57 : Which base is present in RNA but not in DNA?
A
:
Thymine
B
:
Uracil
C
:
Cytosine
D
:
Guanine
58 : What is the primary function of DNA?
A
:
Transporting proteins
B
:
Storing energy
C
:
Storing hereditary information
D
:
Regulating cell division
59 : Which type of RNA forms part of the ribosome's structure?
A
:
mRNA
B
:
rRNA
C
:
tRNA
D
:
sRNA
60 : Who discovered the structure of DNA?
A
:
Hopkins
B
:
John Dalton
C
:
Watson and Crick
D
:
Robert Hooke
61 : Which one is responsible for transmitting genetic information from generation to generation?
A
:
Protein
B
:
Nucleic acid
C
:
Carbohydrate
D
:
Lipids
62 : What are genes composed of?
A
:
Proteins
B
:
Carbohydrates
C
:
Nucleotides
D
:
Lipids
63 : Which molecule is formed during transcription?
A
:
DNA
B
:
tRNA
C
:
mRNA
D
:
rRNA
64 : Where does the mRNA carry the genetic code?
A
:
Nucleus
B
:
Ribosome
C
:
Cytoplasm
D
:
Mitochondria
65 : Which process follows transcription?
A
:
Replication
B
:
Translation
C
:
Mutation
D
:
Segregation
66 : What happens during translation?
A
:
mRNA copies DNA
B
:
DNA is repaired
C
:
Proteins are synthesized
D
:
Nucleotides are broken down
67 : Which organelle reads the mRNA sequence?
A
:
Lysosome
B
:
Golgi apparatus
C
:
Ribosome
D
:
Nucleus
68 : What does the ribosome join together to form proteins?
A
:
Nucleotides
B
:
Amino acids
C
:
Sugars
D
:
Fatty acids
69 : About 50% of the dry weight of cell is made up of:
A
:
Carbohydrates
B
:
Lipids
C
:
Proteins
D
:
Vitamins
70 : Amino Acids are the building blocks of:
A
:
Carbohydrates
B
:
DNA
C
:
Lipids
D
:
Proteins
Biology 9th MCQs || Ilam Ghar
Chapter 6 : Biomolecules
Biology 9th
