Biomolecules practice · Mixed difficulty

Consider the following statements regarding vitamins.

I. Vitamins are the organic compounds required in small amounts in the diet but their deficiency causes specific disease.

II. Vitamins cannot be synthesised by plant but our body can synthesise them.

III. Vitamins are necessary to perform the specific biological functions for the normal maintenance of optimum growth and health of the organism.

Select the false statement about the vitamins and choose the correct option.

The maximum concentration of zwitter ion of given amino acid will be at
$\mathop {N{H_3}}\limits_{\left( {{\text{pKa}} = 9.8} \right)}^ \oplus - C{H_2} - \mathop {C{O_2}H}\limits_{\left( {{\text{pK }}{{\text{a}}_{\text{1}}} = 2.3} \right)}$

Select the uses of carbohydrates.

Which vitamin is closely involved in the formation of collagen-a protein present in connective tissues and bones?

α-D-glucose and β-D-glucose have a specific rotation of +112° and +19° respectively. In aqueous solution the rotation becomes +52°. This process is called :

Candles contain a mixture of:

Assertion (A) A solution of sucrose in water is dextrorotatory while on hydrolysis in presence of little hydrochloric acid, it becomes laevorotatory.

Reason (R) Sucrose on hydrolysis gives unequal amounts of glucose andfructose as a result of which change in sign of rotation is observed.

Wool-wax contains:

Allose and Glucose are isomeric structures with similar structural formula but different configurations. If $D$-Allose and $(L)$-Glucose differs in configuration along $C_i$ no. of carbons $\left(C_i=C_1, C_2, C_3, \ldots \ldots\right)$, then $\sum {C}_{{i}}$ is

Number of non-cyclic tripeptides formed by using 3 amino acids without repeating them is

Which one of the following peak absorption range of ultraviolet light by heterocyclic bases (nitrogen bases)

Which of the following body parts is not composed of structural proteins?

Choose the correct statement.

Which one of the following statements is not true about enzymes?

Acetone may be obtained from starch by the action of :

Complete hydrolysis of cellulose gives

Identify the correct statement regarding enzymes

Fats and oils are formed from:

Fructose is prepared commercially by…a polysaccharide which occurs in dahlia tubers and Jerusalem arthichokes.

Which of the following amino acid is metabolised by brain?

Nitrogenous bases present in DNA

Which one of the following is a water soluble vitamin, that is not excreted easily?

An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0) glutamic acid (3.2) and arginine (10.7) buffered at pH6. What is the fate of the three acids?

Which is incorrect in following -

Which of the following statements is/are incorrect for $D - \left( + \right) -$ glyceradehyde?

The product formed in the reaction of glycine with benzoyl chloride $+ aq.\mathrm{NaOH}$ is

Glucose reacts with acetyl chloride to form penta acetyl glucose, it indicates presence of:

Regarding lysine, incorrect statement is

Phospholipids are esters of glycerol with

Purine base among the following is