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ECAT Chemistry Chapter 25 Macromolecules Online Test MCQs With Answers
Question # 1
Factors affecting denaturation of proteins:
Choose an answer
Change in temp and pH
Strong reducing agent
Strong oxidizing agent
All of these
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Question # 2
The disaccharide present in milk is
Choose an answer
Sucrose
Maltose
Lactose
Cellobiose
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Question # 3
Which has maximum protein content?
Choose an answer
Ground nut
Cow milk
Egg
Wheat
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Question # 4
Poly hydroxyl compounds of aldehyde and ketones are:
Choose an answer
Carbohydrates
Proteins
Fats
Lipids
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Question # 5
Activity of the enzyme is reduced by
Choose an answer
Temperature
Concentration
pH
Inhibitors
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Question # 6
The three dimensional folding and twisting of a polypeptide chain give rise to
Choose an answer
Primary structure
Secondary structure
Tertiary structure
All of these tertiary
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Question # 7
Iodine value of an oil or fat may be defined as
Choose an answer
The number of grams of iodine taken up by 1 g of the oil or fat
The number of grams of iodine taken by 10 g of the oil or fat
The number of grams of iodine taken by 100 g of the oil or fat
None of the above
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Question # 8
On hydrolysis of starch, we finally get
Choose an answer
Glucose
Fructose
Both
Sucrose
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Question # 9
Which teat is not given by both glucose and fructose
Choose an answer
Give yellow ppt of CHl
3
with alkaline aqueous iodine
With 2, 4-DNPH give yellow ppt of hydrazone
Evolve H
2
gas with Na metal
Oxidised with [Ag(NH
3
)
2
]
+
i.e. Tollen's reagent
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Question # 10
Which of the following is not present in nucleotide?
Choose an answer
Guanine
Cytosine
Adenine
Tryoxine
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Question # 11
Plastics are a pollution problem because many plastics
Choose an answer
Are made from petroleum
Are very inflammable
Burn to produce toxic fumes
Decompose to produce toxic products
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Question # 12
Which of the following is an example of ketohexose?
Choose an answer
Mannose
Galactose
Maltose
Fructose
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Question # 13
The number of amino acids found in proteins that a human body can synthesize is
Choose an answer
20
10
5
14
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Question # 14
A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a
Choose an answer
Fibre
Plastic
Varnish
Polyamide resin
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Question # 15
Natural rubber is a polymer of
Choose an answer
Butadiene
Ethyne
Styrene
Isoprene
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Question # 16
Which functional group is present in glycerol tristearate
Choose an answer
Carboxylic acid
Alcohol
Aldehyde
Ester
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Question # 17
Naturally occurring lipids are called
Choose an answer
Fats
protein
Steroids
None
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Question # 18
Which one of the following is a water soluble vitamin
Choose an answer
D
K
A
Ascorbic acid (Vic C)
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Question # 19
Vegetable oils are
Choose an answer
Unsaturated fatty acids
Glycerides of unsaturated fatty acids
Glyccerides of saturated fatty acids
Essential oils obtained from plants
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Question # 20
Cellulose does:
Choose an answer
Satisfy human appetite
Stimulates intestinal peristalsis
Gives fibre and bulk to the food
All of these
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Question # 21
Among the following polymers, the strongest molecular forces are present in
Choose an answer
Elastomers
Fibres
Thermoplactics
Thermosetting polymers
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Question # 22
Hydrolysis of sucrose is called
Choose an answer
Inhibition
Saponification
Inversion
Hydration
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Question # 23
The polymers which can be re-softened again and again are caled
Choose an answer
Thermoplastic
Thermosetting
Both a and b
None
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Question # 24
Purines include
Choose an answer
Adenine
Guanine
Both a and b
None
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Question # 25
The digestion of fats in the intestines is aided by
Choose an answer
Diffusion
Protection
Peptization
Emulsification
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Question # 26
Which of the following is a steroid
Choose an answer
Vitamin A
Vitamin B
Vitamin C
Vitamin D
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Question # 27
Which of these polymers is an addition polymer
Choose an answer
Nylon 6,6
Polystyrene
Terylene
Epoxy resin
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Question # 28
The temp. and pressure used for PVC polymerization is
Choose an answer
10°C and 10 atm
20°C and 20 atm
52°C and 9 atm
100°C and 10 atm
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Question # 29
Which of these polymers is an addition polymer?
Choose an answer
Nylon-6,6
Polystrene
Terylene
Epoxy resin
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Question # 30
Sterols, vitamin D and terpenese belong to
Choose an answer
Simple lipids
Complex lipids
Derived lipids
None
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Question # 31
A fibre which is made from acrylonitrile as monomer
Choose an answer
PVC
Rayon fibre
Acrylic fibre
Polyester fibre
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