Biomolecules
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A typical fat molecule is made up of
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One glycerol and three fatty acid molecules
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One glycerol and one fatty acid moleule
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Thre glycerol and three fatty acid molecules
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Three glycerol molecules and one fatty acid molecule
A.
One glycerol and three fatty acid molecules
A typical fat molecule is a triglyceride formed by the esterification of one glycerol and three fatty acid molecules.
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All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
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lactate dehydrogenase
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isocitrate dehydrogenase
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malate dehydrogenase
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succinate dehydrogenase
D.
succinate dehydrogenase
Succinate dehydrogenase enzyme is present on inner membrane of mitochondria and catalysed the oxidation of succinate to fumarate.
An organic substance bound to an enzyme and essential for its activity is called
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coenzyme
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holoenzyme
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apoenzyme
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isoenzyme
A.
coenzyme
Coenzyme is an organic nonprotein molecule that associates with an enzymes molecule in catalysing biochemical reactions. It usually participates in the substrate-enzyme interaction by donating or accepting certain chemical groups.
Apoenzyme is an inactive enzyme that must associate with a specific cofactor molecule in order to function.
Isoenzyme or isozyme is one of the several forms of an enzyme that catalyse the same reaction but differ from each other in such properties as substrate affinity and maximum rates of enzymes-substrate reaction.
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?
A) Easily translocated
B) Chemically non-reactive
C) Easily digested by animals
D) Osmotically inactive
E) Synthesized during photosynthesis
The useful properties are
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(B) and (C)
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(B) and (D)
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(A), (C) and (E)
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(A) and (E)
C.
(A), (C) and (E)
Starch is a high molecular weight polymer of D-glucose in the alpha 1→4 linkage. It is synthesised in chloroplasts as it is one of the stable end product of photosynthesis. It is most abundant and common storage polysaccharide in plants hence, a most staple food for man and herbivores. It is a mixture of two types of glucose homopolysaccharide viz, amylose and amylopectin. During day time the starch synthesis in chloroplast is coordinated with sucrose synthesis in the cytosol. Typically about 90% of total solute carried in phloem is the carbohydrate sucrose. a disaccharide. This is relatively inactive and highly soluble sugar playing little direct role in metabolism and so making an ideal transport sugar.
For its activity, carboxypeptidase requires
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Zinc
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Iron
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Niacin
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Copper
A.
Zinc
Carboxypeptidase is synthesized and secreted by the exocrine cells of pancreas. Zn2+ is required for the activity of carboxypeptidase, carbonic anhydrase and alcohol dehydrogenase.
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Mock Test Series
Mock Test Series