Biomolecules MCQ Questions & Answers in Organic Chemistry | Chemistry

Maltose is obtained by partial hydrolysis of starch by the enzyme diastase present in Malt.
\[2{{\left( {{C}_{6}}{{H}_{10}}{{O}_{5}} \right)}_{n}}+n{{H}_{2}}O\xrightarrow{\text{Diastase}}n{{C}_{6}}{{H}_{12}}{{O}_{6}}\text{(Maltose)}\]

Deprotonation of protein occur when it is subjected to physical change like change in temperature or chemical change like change in $$pH,$$  the hydrogen bonds are disturbed. As a result, globules unfolds and helix get uncoiled and protein losses its biological activity. Hence, the denaturation of protein makes the protein inactive.

Riboflavin ( vitamin $${B_2}$$  ) is water soluble vitamin. All other vitamins i.e., vitamin $$E,$$ vitamin $$K,$$ vitamin $$D$$ and vitamin $$A$$ (retinol) are fat soluble vitamins.

Enzymes are made up of proteins with specific structure and acts as a catalyst for biochemical reactions.

Cellulose is a straight chain polysaccharide composed of $$D$$ - glucose units which are joined by $$\beta $$ - glycosidic linkages between $$C{\text{ - }}1$$  of one glucose unit and $$C{\text{ - }}4$$  of the next glucose unit.

The peptide linkage $$\left( { - NH - CO - } \right)$$    is formed by the condensation of amino acids molecules

Hence, following structure represents the peptide chain

Although $$D$$ - alanine is a constituent of a bacterial cell walls, it is not found in proteins.

Enzymes and haemoglobin are the examples of globular proteins.

Thyroxin is an amine hormone which is secreted by thyroid gland.