Test: Biomolecules Level - 1 - Chemistry MCQ

Tollens test will be negative for:

Specific rotations of freshly prepared aqueous solutions of I and II are +112 and +18.7, respectively. On standing, the optical rotation of aqueous solution of I slowly decreases to give a final value of +52.7 due to equilibrium with II. Under this state of equilibrium, what is the ratio II:I?

The Haworth projection for a-anomer of D-glucose is:

The correct epimeric pair of the following is:

The incorrect statement in the following is:

The titration curve of alanine hydrochloride is given below:

The position in the graph that corresponds to the isoelectric point of alanine is:

The absolute configurat ions at the two chiral centers in D-ribulose are:

Among the following compounds, which one on reduction wit h NaBH₄ gives meso-compound:

The major product of the reaction is:

The final product of the following reaction:

How many moles of formaldehyde will be formed:

D-glucose and D-fructose can be distinguished by:

Among α- and β-anomeric pairs which one is more stable:

Among the D-glucopyranose forms given below, which is more stable:

Glycosidic linkage will be formed from among which of these reactions:

The product of the below reaction would be:

The compound would be obtained from the

The below reaction a compound. From the sugars given below, identify the sugar that gives the same compound:

From the below list, identify the sugars which on reduction give the same glucitol:

Generally β-[D] glucose in more stable under H₂O. But the solvent is changed to Cyclohexanol under Cyclohexanol. The stable form (major contribution) would be:

The structure of D-galactose is:

Which one of these structures is L-galactose?

The complementary strand of DNA for the following single stranded DNA sequence: 5' - A - T - C- A - T - G - C-3' is:

Synthesis of each molecule of glucose in photosynthesis involves:

In the scheme shown above P, Q, R and S are:

The correct statement about the following disaccharide is:

Match the isoelectric point with the amino acids.

Cellulose upon acetylation with excess acetic anhydride/H₂SO₄ (catalyst ic) gives cellulose triacetate whose structure is: