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Consider the given two statements:
| Assertion (A): | Lipids are not considered macromolecules. |
| Reason (R): | Lipids are not polymers. |
| 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: Lipids |
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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 |
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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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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 |
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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 |
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Consider the given two statements:
| Statement I: | Fatty acids can be classified as saturated if they contain no double bonds between the carbon atoms. |
| Statement II: | Saturated fatty acids are typically more liquid at room temperature compared to unsaturated fatty acids. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Lipids: Fatty Acids |
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Primary proteins are also known as polypeptides, because:
1. they are linear chains.
2. they are polymers of peptide monomers.
3. successive amino acids are joined by peptide bonds.
4. they can assume many conformations.
1. they are linear chains.
2. they are polymers of peptide monomers.
3. successive amino acids are joined by peptide bonds.
4. they can assume many conformations.
Subtopic: Proteins |
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Which of the following is wrong with respect to 'biomolecules'?
Choose the correct answer from the options given below:
1. D & E only
2. A & D only
3. A, B & D only
4. B, E & C only
| A. | Cellulose and starch can hold I2 due to formation of helical secondary structures |
| B. | Proteins transport nutrient across cell membrane and fight infectious organisms |
| C. | At high temperature, enzymes get damaged while inorganic catalysts work efficiently |
| D. | In animal tissue, different drugs, pigments, essential oil, magnesium, O2 compounds are noticed |
| E. | DNA and RNA have three chemically distinct components - heterocyclic, monosaccharides and phosphates. |
1. D & E only
2. A & D only
3. A, B & D only
4. B, E & C only
Subtopic: Proteins | Carbohydrates | Enzymes |
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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 |
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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 |
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