Q. No.Which of the following components makes up the highest percentage of the total cellular mass with respect to an average composition of cells?
1. Water
2. Proteins
3. Carbohydrates
4. Nucleic acids
1. Water
2. Proteins
3. Carbohydrates
4. Nucleic acids
Subtopic: Element Analysis |
92%
Level 1: 80%+
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Phospholipids are an essential component of cell membranes. Which of the following is an example of a phospholipid?
1. Lecithin
2. Glycine
3. Palmitic acid
4. Cholesterol
1. Lecithin
2. Glycine
3. Palmitic acid
4. Cholesterol
Subtopic: Element Analysis | Lipids: Fatty Acids |
91%
Level 1: 80%+
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Which biomolecule always contains phosphorus?
| 1. | Steroids | 2. | Triglycerides |
| 3. | Phospholipids | 4. | Terpenes |
Subtopic: Element Analysis |
91%
Level 1: 80%+
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When a living tissue is completely burnt, the remaining material is called 'ash'. What does this ash primarily contain?
1. Inorganic compounds
2. Organic elements
3. Proteins and lipids
4. Carbohydrates
1. Inorganic compounds
2. Organic elements
3. Proteins and lipids
4. Carbohydrates
Subtopic: Element Analysis |
91%
Level 1: 80%+
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The following can be found as a zwitter ion:
| 1. | Fatty acid | 2. | Monosaccharide |
| 3. | Amino acid | 4. | Nucleic acid |
Subtopic: Element Analysis | Amino Acids |
88%
Level 1: 80%+
NEET - 2024
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All the following statements regarding lipids will be true EXCEPT:
| 1. | Phospholipids contain both hydrophilic and hydrophobic regions, creating amphipathic properties. |
| 2. | Saturated fatty acids lack double bonds, while unsaturated fatty acids contain one or more double bonds. |
| 3. | All lipid molecules demonstrate high solubility in aqueous solutions due to their polar characteristics. |
| 4. | Triglycerides consist of glycerol molecules esterified with three fatty acid chains. |
Subtopic: Element Analysis | Lipids |
88%
Level 1: 80%+
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In an animal cell, the molecule shown in the given figure will be a part of:
1. Acid hydrolases
2. Cell membrane
3. Surface receptors
4. Second messengers
1. Acid hydrolases
2. Cell membrane
3. Surface receptors
4. Second messengers
Subtopic: Element Analysis |
87%
Level 1: 80%+
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When analysing the elemental composition of living tissues compared to earth's crust, the most significant distinguishing characteristic that identifies biological systems is the:
| 1. | Presence of unique elements found exclusively in living organisms |
| 2. | Higher relative abundance of carbon and hydrogen in biological matter |
| 3. | Complete absence of metallic elements in living systems |
| 4. | Uniform distribution of all elements regardless of biological function |
Subtopic: Element Analysis |
85%
Level 1: 80%+
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Arrange the following steps in the correct sequence for the analytical procedure used to separate and identify biomolecules from living tissue samples:
Choose the correct chronological sequence:
| 1. | Grinding tissue sample in trichloroacetic acid using mortar and pestle. |
| 2. | Straining the mixture through cheesecloth to obtain filtrate and retentate. |
| 3. | Weighing fresh tissue sample to determine wet weight. |
| 4. | Analysing separated fractions for different molecular components. |
| 1. | 3 → 1 → 2 → 4 | 2. | 1 → 3 → 4 → 2 |
| 3. | 2 → 1 → 3 → 4 | 4. | 3 → 2 → 1 → 4 |
Subtopic: Element Analysis |
84%
Level 1: 80%+
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Match the following amino acids with their respective R groups (side chains):
Choose the correct option:
1. A–P, B–Q, C–R
2. A–R, B–P, C–Q
3. A–Q, B–R, C–P
4. A–R, B–Q, C–P
| Column-I (Amino Acid) |
Column-II (R Group) |
||
| A. | Glycine | P. | –CH₂OH |
| B. | Alanine | Q. | –CH₃ |
| C. | Serine | R. | –H |
1. A–P, B–Q, C–R
2. A–R, B–P, C–Q
3. A–Q, B–R, C–P
4. A–R, B–Q, C–P
Subtopic: Element Analysis | Amino Acids |
84%
Level 1: 80%+
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