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Q. No.Identify the incorrectly matched pair:
| 1. | Aromatic amino acid | Tryptophan |
| 2. | Basic amino acid | Arginine |
| 3. | Initiator amino acid | Phenylalanine |
| 4. | Simplest amino acid | Alanine |
Subtopic: Different Amino Acids |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Lipids are macromolecules |
| Reason (R): | They have a molecular weight range of ten thousand Daltons and above. |
| 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: Element Analysis |
51%
From NCERT
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Which statement about amino acids is true?
| 1. | All amino acids possess a carboxyl group (-COOH) and an amino group (-NH2) in their side chain. |
| 2. | Amino acids serve as monomers for the synthesis of polysaccharides. |
| 3. | Only 10 amino acids are synthesized in the human body and the rest must be obtained from the diet. |
| 4. | The R-group (side chain) determines the unique characteristics and functions of each amino acid. |
Subtopic: Amino Acids |
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From NCERT
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The molecule given in the figure is a:
1. Triose sugar
2. Fatty acid
3. Gamma amino acid
4. Three carbon alcohol
1. Triose sugar
2. Fatty acid
3. Gamma amino acid
4. Three carbon alcohol
Subtopic: Lipids |
52%
From NCERT
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Identify the correct match based on the percentage distribution of elements:
| 1. | Sulphur (S): 3.3% in Earth's crust, 0.03% in the human body. |
| 2. | Magnesium (Mg): 2.1% in Earth's crust, 0.1% in the human body. |
| 3. | Calcium (Ca): 0.03% in Earth's crust, 1.5% in the human body. |
| 4. | Oxygen (O): 46.6% in the human body, 65% in the Earth's crust |
Subtopic: Introduction |
From NCERT
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| Assertion (A): | Secondary metabolites in plants do not play any roles in the plant bodies. |
| Reason (R): | All secondary metabolites are excretory products in plants. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Primary & Secondary Metabolites |
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Match the following secondary metabolites with their examples as given in the table of NCERT:
Options:
1. 1-A, 2-B, 3-C
2. 1-C, 2-A, 3-B
3. 1-B, 2-C, 3-A
4. 1-C, 2-B, 3-A
| Column A | Column B | ||
| 1. | Alkaloids | A. | Tannins |
| 2. | Terpenoids | B. | Rubber |
| 3. | Polyphenols | C. | Caffeine |
1. 1-A, 2-B, 3-C
2. 1-C, 2-A, 3-B
3. 1-B, 2-C, 3-A
4. 1-C, 2-B, 3-A
Subtopic: Primary & Secondary Metabolites |
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Consider the given two statements:
| Assertion (A): | Protein denaturation results in the loss of its biological activity. |
| Reason (R): | Protein denaturation is always irreversible. |
| 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. | (A) is False but (R) is True |
Subtopic: Proteins |
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In the DNA double helix:
| I: | At each step of ascent, the strand turns 34º. |
| II: | The rise per base pair would be 0.36 nm. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: The DNA |
54%
From NCERT
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The skeletal formula (showing numbering convention for substituent groups) of a simple aromatic ring shown below will be a part of the structure of all the following except:
| 1. | Thymine | 2. | Cytosine |
| 3. | Uracil | 4. | Adenine |
Subtopic: Nucleic Acid: Nucleotides |
58%
From NCERT
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