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Q. No.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
Subtopic: Carbohydrates - Classification & D-L configuration |
93%
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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. |
Subtopic: Carbohydrates - Classification & D-L configuration |
83%
From NCERT
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The secondary structure of protein is represented by:
1. α-Helix structure
2. β-Pleated sheet structure
3. Both 1 and 2
4. None of the above
1. α-Helix structure
2. β-Pleated sheet structure
3. Both 1 and 2
4. None of the above
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
89%
From NCERT
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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. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
86%
From NCERT
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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.
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
95%
From NCERT
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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. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
86%
From NCERT
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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 |
Subtopic: DNA, RNA & Metal Ions |
80%
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Given below are two statements:
Select the most appropriate answer from the options given below:
| Assertion (A): | Two strands of DNA are complementary to each other. |
| Reason (R): | Adenine specifically forms hydrogen bonds with guanine, whereas cytosine forms hydrogen bonds with thymine. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: DNA, RNA & Metal Ions |
83%
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Monosaccharides are:
| 1. | Carbohydrates that can't be hydrolysed further to give simpler units of polyhydroxy aldehyde or ketone. |
| 2. | Classified on the basis of the number of carbon atoms and the functional group present in them. |
| 3. | The monomers of carbohydrates. |
| 4. | All of the above. |
Subtopic: Carbohydrates - Classification & D-L configuration |
85%
From NCERT
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Consider the following statements about proteins:
a. Peptide linkage is also known as amide linkage (-CO-NH-)
b. Simply the sequence of amino acids in a polypeptide chain is the primary structure of a protein.
c. During denaturation secondary and tertiary structures are destroyed but the primary structure remains intact.
d. In protein, hydrogen bonds are not disturbed if the protein is subjected to physical change or any chemical change.
The correct statements are-
1. a, d
2. a, d, c
3. a, b, c
4. b, c, d
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
83%
From NCERT
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