Biomolecules practice · Medium

is/are a nonreducing sugar.

Cane sugar is made of:

The purine base present in RNA is

Vitamin C must be supplied regularly in diet because

On what basis are the manosaccharides classified?

The base adenine occurs in which among the following.

Non-essential amino acid among the following is

Essential oils are:

Which of the following statements about enzymes are true?

1. Enzymes lack in nucleophilic groups.

II. Pepsin is proteolytic enzyme.

III. Enzymes catalyse chemical reactions enhances the rate of reaction by lowering the activation energy.

IV. Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.

Assertion (A): $\alpha$-helix structure of proteins is in the shape of right handed screw.

Reason (R): There is hydrogen bond between the $> \mathrm{NH}$ group of each amino acid to the $> =\mathrm{O}$ of an adjacent turn of the helix.

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

The hormone produced by pancreas

The RBC deficiency is deficiency disease of:

One mole of sucrose on hydrolysis gives

Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives

Assertion(A): Sucrose is a reducing sugar.

Reason(R): On hydrolysis sucrose bring the change in sign of rotation from dextro(+) to laevo(-)
In the light of the above statements, choose the most appropriate answer from the options given below.

Which functional group participates in disulphide bond formation in proteins?

The disaccharide held together by a glycosidic linkage between C1 of $\alpha \mathrm{ - D}$ -glucose and C2 of $\beta \mathrm{ - D}$ -fructose is

Which one group of biological molecule are micro and macromolecule respectively?

Which of the statements about "Denaturation" given below are correct ?

(A) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.

(B) Denturation leads to the conversion of double strand of DNA into single strand.

(C) Denaturation affects primary structure which gets distorted.

Options :

Chemically amylose is a with $200-1000$ $\alpha$-D-(+)-glucose units held by glycosidic linkage

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

Which of the following bases is not present in DNA?

Assertion (A): Glucose does not form the hydrogen bisulphite addition product.

Reason (R): Glucose is not so reactive to form the product with $\mathrm{NaHSO}_3$.

The change in optical rotation of a freshly prepared solution of glucose with time is called ______.

Starch can be used as an indicator for the detection of the traces of:

Assertion (A): A solution of sucrose on hydrolysis becomes laevorotatory from dextrorotatory.

Reason (R): Sucrose on hydrolysis gives more number of glucose units due to which sign of rotation is changed.

Which of the following sets of bases is present both in DNA and in RNA?

Assertion:- Sucrose is dextrorotatory but its aqueous solution is laevorotatory.

Reason:- Dextro rotation of glucose is less than laevorotation of fructose.

Which of the following is not an example of fibrous protein?