Question # 1

Factors affecting denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

The disaccharide present in milk is

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Sucrose

Maltose

Lactose

Cellobiose

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Poly hydroxyl compounds of aldehyde and ketones are:

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Carbohydrates

Proteins

Fats

Lipids

Activity of the enzyme is reduced by

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Temperature

Concentration

pH

Inhibitors

The three dimensional folding and twisting of a polypeptide chain give rise to

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Primary structure

Secondary structure

Tertiary structure

All of these tertiary

Iodine value of an oil or fat may be defined as

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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

On hydrolysis of starch, we finally get

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Glucose

Fructose

Both

Sucrose

Which teat is not given by both glucose and fructose

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Give yellow ppt of CHl₃with alkaline aqueous iodine

With 2, 4-DNPH give yellow ppt of hydrazone

Evolve H₂gas with Na metal

Oxidised with [Ag(NH₃)₂]⁺i.e. Tollen's reagent

Which of the following is not present in nucleotide?

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Guanine

Cytosine

Adenine

Tryoxine

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

Which of the following is an example of ketohexose?

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Mannose

Galactose

Maltose

Fructose

The number of amino acids found in proteins that a human body can synthesize is

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20

10

5

14

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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Fibre

Plastic

Varnish

Polyamide resin

Natural rubber is a polymer of

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Butadiene

Ethyne

Styrene

Isoprene

Which functional group is present in glycerol tristearate

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Carboxylic acid

Alcohol

Aldehyde

Ester

Naturally occurring lipids are called

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Fats

protein

Steroids

None

Which one of the following is a water soluble vitamin

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D

K

A

Ascorbic acid (Vic C)

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glyccerides of saturated fatty acids

Essential oils obtained from plants

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Gives fibre and bulk to the food

All of these

Among the following polymers, the strongest molecular forces are present in

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Elastomers

Fibres

Thermoplactics

Thermosetting polymers

Hydrolysis of sucrose is called

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Inhibition

Saponification

Inversion

Hydration

The polymers which can be re-softened again and again are caled

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Thermoplastic

Thermosetting

Both a and b

None

Purines include

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Adenine

Guanine

Both a and b

None

The digestion of fats in the intestines is aided by

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Diffusion

Protection

Peptization

Emulsification

Which of the following is a steroid

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Vitamin A

Vitamin B

Vitamin C

Vitamin D

Which of these polymers is an addition polymer

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Nylon 6,6

Polystyrene

Terylene

Epoxy resin

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

Which of these polymers is an addition polymer?

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Nylon-6,6

Polystrene

Terylene

Epoxy resin

Sterols, vitamin D and terpenese belong to

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Simple lipids

Complex lipids

Derived lipids

None

A fibre which is made from acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

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