Q. No.The enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are called as:
1. Oxidoreductases
2. Hydrolases
3. Ligases
4. Lyases
1. Oxidoreductases
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Consider the following enzymes:
I. Catalase
II. Peroxidase
III. Carboxypeptidase
Which of these enzymes require haem as a cofactor for their activity?
1. I only
2. I and II only
3. II and III only
4. I, II and III
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The property of the water molecule that is most important for the maintenance of homeostasis in living organisms is:
1. High latent heat of vaporization
2. High latent heat of fusion
3. High specific heat
4. Liquid form more dense than solid form
Chitin, a complex polysachharide is found in:
1. Plant cell wall
2. The exoskeleton of arthropods and cell walls of most fungi
3. Bacterial cell wall
4. Cartilage and other connective tisuue
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Given below is the structure of a monosaccharide. The homopolymer of this monosaccharide is used in:
1. Storage of carbohydrates in plants
2. Storage of carbohydrates in animals
3. Making the medium for microbial culture
4. Formation of the structure of the plant cell wall
Given below is the structure of a lipid. The excess of this compound in human blood can lead to:
1. Alzheimer’s disease
2. Phenylketonuria
3. Atherosclerosis
4. Rheumatoid arthritis
Shown below is a level of structural organization of a protein. Which of the following proteins attains its final form as this structure
1. Keratin
2. Fibroin
3. Tropo-collagen
4. Myoglobin
The following diagram depicts the structure of a:
1. Nucleoside
2. Nucleotide
3. Nitrogen containing Monosaccharide
4. Glycoprotein
The chitinous exoskeleton of arthropods is formed by the polymerisation of–
1. D- glucosamine
2. N- acetyl glucosamine
3. Lipoglycans
4. Keratin sulphate and chondroitin sulphate
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Look at the graph given below. The reaction rate, of the reaction, can be increased beyond point C by:
1. increasing the amount of substrate
2. adding more water
3. increasing the temperature
4. decreasing enzyme concentration
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