Q. No.Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a-e) make it useful as a storage material?
(1) easily translocated
(2) chemically non-reactive
(3) easily digested by animals
(4) osmotically inactive
(5) synthesized during photosynthesis
The useful properties are :
1. (1), (2) and (5)
2. (1) and (5)
3. (2) and (3)
4. (2) and (4)
(1) easily translocated
(2) chemically non-reactive
(3) easily digested by animals
(4) osmotically inactive
(5) synthesized during photosynthesis
The useful properties are :
2. (1) and (5)
3. (2) and (3)
4. (2) and (4)
In feedback inhibition, a metabolic pathway is switched off by:
1. a rise in temperature
2. lack of a substrate
3. accumulation of the end product
4. competitive inhibition
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The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
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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
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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
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