Biomolecules

(c) Km increases but Vmax remains the same in competitive inhibition.

(a) Holoenzyme consists of a protein part called apoenzyme and a non-protein called cofactor/coenzyme.

(c) Prosthetic groups are tightly bound to the apoenzyme but coenzymes are associated transiently.

RNA is typically single standard but it contains uracil, not thymine.

DNA is secondary structure has a double strand helix consisting of two polynucleotide chains.

Its four nitrogenous bases are adenine (A), guanine (G), cytosine (C) and thymine (T).

D-Fructose is found in honey and is a keto sugar.

Fehling's solution is a chemical reagent used to differentiate between water-soluble carbohydrates and ketone-functional groups, and as a test for monosaccharides.

It is used specially in the Fehling's test for reducing sugars.

The test involves two solutions, generally known as Fehling's A and Fehling's B, which are mixed together and added to perform the test.

Fehling's solution 'A' is an aqueous solution of copper(II) sulfate.

Thus, the correct option is: Option A: aqueous copper sulphate The function of Fehling's A is to provide copper(II) ions,

, which act as the oxidizing agent in the reaction with the reducing sugar.

When Fehling's Solution A and B are mixed and heated with a reducing sugar, the copper(II) ions are reduced to copper(I) oxide, which precipitates as a red solid, indicating a positive result.

Fehling's Solution B, on the other hand, contains alkaline sodium potassium tartrate, which helps to maintain the solution in an alkaline condition and keeps the copper(II) ions in solution.

Thus, in summary, Fehling's A consists of aqueous copper sulfate, which directly matches with Option A.

$\bullet$ Proteins are polymers of $\alpha$-amino acids and they are connected to each other by peptide bond, but this is not denaturation process.

$\bullet$ Due to denaturation globules unfold and helix get uncoiled and protein loses its biological activity.

Denaturation can be caused if protein in its native form, is subjected to physical change like change in temperature or chemical change like change in pH

Enzymes are complex nitrogenous organic compounds which are produced by living plants and animals.

They are protein molecules of high molecular mass.

They are not polysaccharides.

Lysine is a basic amino acid it contains more number of $-$ NH 2 groups as compared to $-$ COOH groups due to their symmetrical.

Sucrose is a disaccharide composed of two monosaccharide units, glucose and fructose, joined together via a glycosidic bond.

Upon hydrolysis, this bond is broken, and the two constituent monosaccharides are released.

Hydrolysis of sucrose results in the formation of one molecule of glucose and one molecule of fructose.

However, it is important to specify the configurations of these monosaccharides as they exist in specific forms.

Sucrose

$\alpha$-D-Glucose + $\beta$-D-Fructose Glucose in sucrose is in the $\alpha$-D form while fructose is in the $\beta$-D configuration.

Thus, the correct answer reflecting the products of sucrose hydrolysis is: Option B: $\alpha$-D-Glucose + $\beta$-D-Fructose This reflects the correct stereochemistry and identity of the monosaccharides produced from the hydrolysis of sucrose.