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.

D.

succinate dehydrogenase

Succinate dehydrogenase enzyme is present on inner membrane of mitochondria and catalysed the oxidation of succinate to fumarate.

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.

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.

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.