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Subtopic: Carbohydrates - Classification & D-L configuration |
57%
From NCERT
JEE
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Match the compounds in Column-I with their corresponding relationships in Column-II and then choose the correct option from the given choices:
| Column-I (Compounds) | Column-II (Relation) | ||
| (i) | \(\alpha\text -\)Glucose and \(\alpha\text{-}\)Galactose |
(a) | Homologues |
| (ii) | \(\alpha\text -\)Glucose and \(\alpha\text -\)Fructose |
(b) | Epimer |
| (iii) | \(\alpha\text -\)Glucose and \(\beta\text{-}\)Glucose |
(c) | Anomer |
| (iv) | \(\alpha\text{-}\)Ribose and \(\alpha\text{-}\)Glucose |
(d) | Functional isomers |
| 1. | \(\text { (i) } \rightarrow \text { (b); (ii) } \rightarrow \text { (d); (iii) } \rightarrow \text { (a), (iv) } \rightarrow \text { (c) }\) |
| 2. | \(\text { (i) } \rightarrow \text { (b); (ii) } \rightarrow \text { (d); (iii) } \rightarrow \text { (c), (iv) } \rightarrow \text { (a) }\) |
| 3. | \(\text { (i) } \rightarrow \text { (d); (ii) } \rightarrow \text { (b); (iii) } \rightarrow \text { (c), (iv) } \rightarrow \text { (a) }\) |
| 4. | \(\text { (i) } \rightarrow \text { (a); (ii) } \rightarrow \text { (c); (iii) } \rightarrow \text { (d), (iv) } \rightarrow \text { (b) }\) |
Subtopic: Polysaccharides & their Importance |
67%
From NCERT
JEE
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Which of the following statements is incorrect?
| 1. | Enzymes are biocatalysts |
| 2. | Enzymes are not specific |
| 3. | Enzymes are globular proteins |
| 4. | Oxidase enzymes catalyse the oxidation of C-N and C-O bonds |
Subtopic: Vitamins, Hormones & Enzymes |
89%
From NCERT
JEE
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Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
82%
From NCERT
JEE
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A biomolecule gives the following observations:
The correct structure of the biomolecule, from the following, is:
| (i) | With Br2/H2O, it gives monocarboxylic acid |
| (ii) | With acetate, it gives tetraacetate |
| (iii) | With HI/Red P, it gives isopentane |
The correct structure of the biomolecule, from the following, is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Carbohydrates - Classification & D-L configuration |
51%
From NCERT
JEE
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Which of the following cyclic forms represents the pyranose form of the linear carbohydrate shown in the image?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Carbohydrates - Classification & D-L configuration |
72%
From NCERT
JEE
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Match List–I (Carbohydrates) with List – II (Cyclic Structures) and select the correct option:
1. A – 4; B – 1; C – 2; D – 3
2. A – 1; B – 4; C – 3; D – 2
3. A – 2; B – 3; C – 4; D – 1
4. A – 1; B – 3; C – 2; D – 4
| List - I (Carbohydrates) |
List - II (Cyclic Structures) |
||
| A. | α − D −Glucopyranose | 1. |  |
| B. | β −D − Glucopyranose | 2. |  |
| C. | α − D − Fructofuranose | 3. |  |
| D. | β − D −Fructofuranose | 4. |  |
1. A – 4; B – 1; C – 2; D – 3
2. A – 1; B – 4; C – 3; D – 2
3. A – 2; B – 3; C – 4; D – 1
4. A – 1; B – 3; C – 2; D – 4
Subtopic: Carbohydrates - Classification & D-L configuration |
73%
From NCERT
JEE
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Match the saccharides in List-I with their corresponding glycosidic linkages in List-II:
Choose the correct answer from the options given below :
1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
3. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
4. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
| List-I (Saccharides) |
List-II (Glycosidic linkages found) |
||
| (A) | Sucrose | (I) | \(\alpha\) 1 - 4 |
| (B) | Maltose | (II) | \(\alpha\) 1 – 4 and \(\alpha\) 1 – 6 |
| (C) | Lactose | (III) | \(\alpha\) 1 – \(\beta\) 2 |
| (D) | Amylopectin | (IV) | \(\beta\) 1 – 4 |
Choose the correct answer from the options given below :
1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
3. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
4. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Subtopic: Polysaccharides & their Importance |
82%
From NCERT
JEE
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Given below are two statements:
| Statement I: | Fructose does not contain an aldehydic group but still reduces Tollen’s reagent. |
| Statement II: | In the presence of base, fructose undergoes rearrangement to give glucose. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: Carbohydrates - Classification & D-L configuration |
66%
From NCERT
JEE
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Which of the following conversions occur during acidic hydrolysis?
Choose the correct answer from the options given below:
1. (C), (D) and (E) only
2. (A), (B) and (C) only
3. (B), (C) and (E) only
4. (B), (C) and (D) only
| (A) | Starch gives galactose. |
| (B) | Cane sugar gives equal amounts of glucose and fructose. |
| (C) | Milk sugar gives glucose and galactose. |
| (D) | Amylopectin gives glucose and fructose. |
| (E) | Amylose gives only glucose. |
1. (C), (D) and (E) only
2. (A), (B) and (C) only
3. (B), (C) and (E) only
4. (B), (C) and (D) only
Subtopic: Polysaccharides & their Importance |
73%
From NCERT
JEE
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