An example of competitive inhibition of an enzyme is the inhibition of:

• succinic dehydrogenase by malonic acid

• cytochrome oxidase by cyanide

• hexokinase by glucose-6-phosphate

• carbonic anhydrase by carbon dioxide

Antibiotic flavicin is obtained from

• Aspergillus flavus 

• Aspergillus clavatum

• Streptomyces grieseus

• Streptomyces fradiae

Antifeedant property occurs in

• nicotine

• azadiractin

• rotenone

• cinerin

Lipids are insoluble molecules are :

• neutral

• Zwitter ions

• hydrophobic

• hydrophilic

Which of the following is the simplest amino acid?

• Glycine

• Alanine

• Tyrosine

• Asparagine

Carbohydrates, ingested in the diet, are hydrolyzed by the enzyme :

• pepsin

• cellulose

• $\mathrm{\alpha }$- amylase

• glycosidase

The vitamin present in Coenzyme is

• B₂

• niacin

• pyridoxine

• pantothenic acid

108.

Quaternary structure of protein

• consists of four subunits

• may be either $\mathrm{\alpha }$ or $\mathrm{\beta }$

• is unrelated to two functions of the protein

• is dictated by the primary structures of the individual subunits

Identify the sulphur containing amino acid

• proline

• methionine

• aspartic acid

• tryptophan

Which of the following carbohydrates is not a disaccharide?

• Maltose

• Lactose

• Sucrose

• Galactose