Among the following, reducing sugar is:
1. Galactose
2. Gluconic acid
3. β-methyl galactoside
4. Sucrose
A compound that gives a positive Fehling solution test is:
1. | Sucrose | 2. | Glucose |
3. | Fats | 4. | Protein |
Which is the correct statement among the following?
1. | Starch is a polymer of α-glucose |
2. | Amylose is a component of cellulose |
3. | Proteins are composed of only one type of amino acid |
4. | In the cyclic structure of fructose, there are four carbons and one oxygen atom |
Reducing sugars are -
1. | Carbohydrates that reduce Fehling’s solution and Tollen’s reagent. |
2. | Carbohydrates that reduce only Tollen’s reagent. |
3. | Carbohydrates that reduce only Fehling’s solution . |
4. | Carbohydrates that reduce HI |
The term glycosidic linkage means :
1. | Two monosaccharide units bonded by an oxygen atom. |
2. | Two monosaccharide units bonded by a sulphur atom. |
3. | Two peptide units bonded by an oxygen atom. |
4. | Two peptide units bonded by an hydrogen atom. |
α-helix structure of proteins is stabilized by :
1. | H-bonds formed between the −SH and C=O group. |
2. | H-bonds formed between the −NH and C=O group. |
3. | Ionic bonds formed between the −SH and C=O group. |
4. | Ionic bonds formed between the −NH and C=O group. |
Amino acids exhibit amphoteric behavior as:
1. They can act both as an acid and as a base.
2. They can act only as an acid but not as a base.
3. They can act only as a base but not an acid.
4. None of the above.
The denaturation of proteins indicates:
1. | The primary structure of a protein is destroyed and the enzyme loses it's activity. |
2. | The primary structure of a protein is destroyed and the enzyme enhances it's activity. |
3. | The secondary and tertiary structures of a protein are destroyed and the enzyme loses it's activity. |
4. | The secondary and tertiary structures of a protein are destroyed and the enzyme enhances it's activity. |
A nucleoside is different from a nucleotide as:
Nucleoside | Nucleotide | |
1. | Sugar, Protein | Sugar, Protein, Phosphoric acid |
2. | Fatty acid, Base | Fatty acid, Base, Phosphoric acid |
3. | Sugar, Base | Sugar, Base, Phosphoric acid |
4. | Sugar, Base, Phosphoric acid | Sugar, Base |