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Q. No.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
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
89%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
Consider the following statements:
| a. | Proteins are synthesized by various RNA molecules in the cell and commands for protein synthesis are present in DNA. |
| b. | RNA contains β-D-ribose and DNA contains β-D-2-deoxyribose. |
| c. | RNA contains thymine and DNA contains uracil. |
| d. | RNA molecules are of three types, that is, messenger RNA, ribosomal RNA, and transfer RNA |
The incorrect statement(s) are:
1. a, b and d
2. Only a and b
3. Only d
4. Only c
Subtopic: DNA, RNA & Metal Ions |
74%
Level 2: 60%+
Hints
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%
Level 1: 80%+
Hints
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 |
92%
Level 1: 80%+
Hints
The helical structure of a protein is stabilized by:
| 1. | Hydrogen bonds | 2. | Ether bonds |
| 3. | Peptide bonds | 4. | Dipeptide bonds |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
82%
Level 1: 80%+
AIPMT - 2004
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