Archives

The cofactor of the enzyme carboxypeptidase is

1) copper 2) iron 3) zinc 4) manganese Answer:3) zinc Explanation: Carboxypeptidase is a proteolytic enzyme. Zinc is a cofactor for... View Article

All of the following statements include functions of proteins except

1) digestion of food substances 2) action against disease-causing microbes 3) transport of oxygen 4) carrying genetic information Answer:4)... View Article

The repeating unit of glycogen is

1) fructose 2) mannose 3) glucose 4) galactose Answer:3) glucose Explanation: Glycogen is a homopolymer of glucose. Glucose is stored in the body... View Article

An organic substance that binds to the enzyme and essential for its activity, is called

1) holoenzyme 2) apoenzyme 3) isoenzyme 4) coenzyme Answer:4) coenzyme Explanation: Coenzyme is the organic cofactor which binds to the enzyme... View Article

The most abundant enzyme in the biosphere is

1) Collagen 2) RuBisCO 3) Trypsin 4) Insulin Answer:2) RuBisCO Explanation: RuBisCO, i.e. Ribulose 1, 5-bisphosphate carboxylase oxygenase is the... View Article

Fat is hydrolysed by the enzyme lipase to yield

1) fatty acid and amino acids 2) glycerol and fatty acids 3) glycerine and water 4) glycerol and amino acids Answer:2) glycerol and fatty acids... View Article

How many types of enzymes have been recognised by the International Union of Biochemistry?

1) 4 2) 5 3) 6 4) 8 Answer:3) 6 Explanation: The enzymes are classified into six major classes. They are oxidoreductases, transferases,... View Article

Factor(s) which can influence enzyme activity is/are

1) high temperature 2) pH 3) substrate concentration 4) all of these Answer:4) all of these Explanation: Enzymes show maximum activity in the... View Article

_________ Catalyse covalent bonding between two molecules to form a large molecule.

1) Hydrolases 2) Transferases 3) Isomerases 4) Ligases Answer:4) Ligases Explanation: Ligases catalyse linking of two compounds by formation of... View Article

Most of the biochemical reactions differ from those occurring in the non-living world in

1) being spontaneous 2) releasing energy 3) being enzymatic 4) requiring energy Answer:3) being enzymatic Explanation: In the living system,... View Article

A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides is:

1) Chitin 2) Starch 3) Cellulose 4) Dextran Answer:4) Dextran Explanation: Dextran is produced by the bacteria Leuconostoc mesenteroides by... View Article

Most animal lipids are composed of fatty acids, whereas most plant lipids are composed of _ fatty acids.

1) unsaturated; saturated 2) saturated; unsaturated 3) saturated; saturated 4) unsaturated; unsaturated Answer:2) saturated; unsaturated... View Article

Cellulose, the most important constituent of the plant cell wall is made up of

1) unbranched chain of glucose molecules linked by an alpha 1,4-glycosidic bond. 2) branched chains of glucose molecules linked by a beta... View Article

Which of the following is a heteropolysaccharide?

1) Peptidoglycan 2) Starch 3) Inulin 4) Chitin Answer:1) Peptidoglycan Explanation: Heteropolysaccharide is a polymer having more than one... View Article

Choose the group of polysaccharides.

1) Starch, glycogen, cellulose 2) Sucrose, maltose, glucose 3) Glucose, fructose, lactose 4) Galactose, starch, sucrose Answer:1) Starch,... View Article

Carbohydrates, the most abundant biomolecules on Earth are produced by:

1) Some bacteria, algae and green plants 2) Fungi, algae and green plants 3) All bacteria, fungi and algae 4) Viruses, fungi and bacteria... View Article

About 98% of the mass of every living organism is composed of just six elements, which are carbon, hydrogen, nitrogen, oxygen, and _.

1) Sulphur, magnesium 2) Magnesium, sodium 3) Calcium, phosphorus 4) Phosphorus, sulphur Answer:3) Calcium, phosphorus Explanation: About... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30