Biomolecules MCQ Questions & Answers in Organic Chemistry | Chemistry

Glucose reduces Fehling solution to give red $$ppt.$$  of $$C{u_2}O.$$

Thus, three phenyl hydrazine molecules and one molecule of glucose is required to form osazone.

$$(A)$$  and $$(C)$$  are between $$C{\text{ - }}1$$  and $$C{\text{ - 4,}}$$  $$(B)$$  is between $$C{\text{ - }}1$$  and $$C{\text{ - 6}}{\text{.}}$$

Five-membered rings are named as furanose while six-membered rings are named as pyranose rings.

Vitamins are classified as
(i) Fat soluble vitamin - $$A, D, E, K$$
(ii) Water soluble vitamin - $$B$$  complex, $$H$$ and $$C$$
So, vitamin - $$B$$  is water soluble.

Glucose contains 1 primary and 4 secondary alcoholic groups which get acetylated by 5 acetate groups.
\[\underset{\begin{smallmatrix} |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ C{{H}_{2}}OH\,\,\,\,\,\,\, \end{smallmatrix}}{\overset{\begin{smallmatrix} CHO\,\,\,\,\,\,\,\,\, \\ |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \end{smallmatrix}}{\mathop{{{\left( CHOH \right)}_{4}}}}}\,+5{{\left( C{{H}_{3}}CO \right)}_{2}}O\to \]      \[\underset{\begin{smallmatrix} |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ C{{H}_{2}}OCOC{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\, \end{smallmatrix}}{\overset{\begin{smallmatrix} CHO\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \end{smallmatrix}}{\mathop{{{\left( CHOCOC{{H}_{3}} \right)}_{4}}}}}\,+5C{{H}_{3}}COOH\]

Inulin is a polysaccharide of fructose, while all others are polysaccharides of glucose ; although all the four has same molecular formula, $${\left( {{C_6}{H_{10}}{O_5}} \right)_n}.$$

$$DNA$$  consists of two polynucleotide chains, each chain forms a right handed spiral with ten bases in one turn of the spiral. The two chains coil to double helix and run in opposite direction held together by hydrogen bonding.

$$'a'$$  carbon of glucose and $$'b'$$  carbon of fructose are anomeric carbon atoms.

Phospholipids are esters of glycerol with two carboxylic acid residue and one phosphate group.
Hence, phospholipids may be regarded as derivative of glycerol in which two hydroxyl groups are esterified with fatty acid, while third is esterified with phosphoric acid.