Question # 1

A sequence of how many nucleotides in massenger RNA makes a codon for an amino acid

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Three

Four

One

Two

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

Molar mass of high molecular w.f. polymers ranges from:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 100000000

The clotting time of blood is increased due to the deficiency of

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Vitamin A

Vitamin K

Vitamin D

Vitamin C

Enzymes catalyse all biological reactions occurring in the cell. What is true about an enzyme

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Enzyme is a small molecule

Enzyme is acidic in nature

Enzyme is a protein

Enzyme is a lipid

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

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

Glyptal polymer is obtained from glycerol on reacting with

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Malonic acid

Phthalic acid

Maleic acid

Acetic acid

Which one of the following is the most abundant organic substance found in nature

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Fructose

Starch

Glucose

Cellulose

Organic synthetic or man made polymers are plastics, rubber and fibre. Which is not a synthetic polymer

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Silk

Polyester

Polyvinyl chloride

Nylon

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

Vitamin A is present in

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Liver

Milk

Green vegetables

All

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grmas of fat, this is called

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Oil number

Saturation number

Iodine number

Un saturation number

Poly hydroxyl compounds of aldehyde and ketones are:

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Carbohydrates

Proteins

Fats

Lipids

Terylene is madeby polymerization of terephthalic acid with

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Ethylene glycol

Phenol

Ethanol

Catechol

Denaturation of protein means the structure of protein is disrupted, indicate which factor foes not denature protein

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Heating protein

pH changes

Oxidising agent

Keeping pH 7.35

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

One of the followings is not type of polymer

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Homopolymer

Copolymer

Heteropolymer

Terpolymer

In fructose the possible optical isomers are

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12

8

16

4

Which of the following is an example of ketohexose?

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Mannose

Galactose

Maltose

Fructose

Which of the following polymers is used for weather resistant paints

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Arcylic resins

Polyvinyl acetate

Polystyrene

PVC

Copolymer is

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Nylon-6

Nylon 66

PMMA

Polyethene

Which of the following elements is not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

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

Polymer formation from monomers starts by

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Condensation reaction between monomers

Coordination reaction between monomers

Conversion of monomer to monomer ions by protons

Hydrolysis of monomers

The fibre which is made form acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

Which of the following fibres are made of polyamides?

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Dacron

Orlon

Nylon

Rayon

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

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20

10

5

14

Which of the following is a steroid

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Vitamin A

Vitamin B

Vitamin C

Vitamin D

For every reaction occurring in the body three is at least one type of

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Enzyme

Vitamin

Protein

Amino acid

Polysaccharides are also called

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Crystals

Sugars

Liquids

None sugars

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