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Q. No.Cut surfaces of fruit and vegetables often become dark because
(1) dirty knife makes it dark
(2) oxidation of tannic acid in the presence of a trace of iron from the knife makes it dark
(3) dust of the air makes it dark
(4) none of the above
Subtopic: Element Analysis |
90%
Level 1: 80%+
AIIMS - 2008
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The biological organisation starts with:
1. Submicroscopic molecular level
2. Cellular level
3. Organisms level
4. Atomic level
Subtopic: Element Analysis |
52%
Level 3: 35%-60%
AIPMT - 2007
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Subtopic: Element Analysis |
95%
Level 1: 80%+
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Which of the following is not strictly a biomacromoles?
1. Proteins
2. Lipids
3. Polysaccharides
4. Nucleic acid
Subtopic: Element Analysis | Introduction |
92%
Level 1: 80%+
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A secondary metabolite that acts as a toxin is
1. Carotenoids
2. Curcumin
3. Abrin
4. Monoterpenes
Subtopic: Element Analysis |
88%
Level 1: 80%+
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Subtopic: Element Analysis |
82%
Level 1: 80%+
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Which of the following organic molecule is not correctly matched with the diagrammatic representation of its structure?
| 1. | Alanine | .svg) |
| 2. | Palmitic acid | \(CH_3 - {(CH_2)}_{14} - COOH\) |
| 3. | Glycerol | .svg) |
| 4. | Adenylic acid | .svg) |
Subtopic: Element Analysis |
76%
Level 2: 60%+
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If we compare percentage weight of elements present in Earth’s crust and the Human body, which of the following would be present in the largest percentage in both?
1. Carbon
2. Oxygen
3. Hydrogen
4. Nitrogen
1. Carbon
2. Oxygen
3. Hydrogen
4. Nitrogen
Subtopic: Element Analysis |
70%
Level 2: 60%+
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Amongst the following, the element constituting the least percent of the weight of human body is:
1. Oxygen
2. Carbon
3. Hydrogen
4. Nitrogen
1. Oxygen
2. Carbon
3. Hydrogen
4. Nitrogen
Subtopic: Element Analysis |
Level 4: Below 35%
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When a cell is chemically analysed, one feature common to all compounds found in the acid soluble pool is:
1. They are all homopolymers.
2. They are all heteropolymers.
3. They have molecular weight between 18 and 800 daltons.
4. All of them are biomacromolecules.
1. They are all homopolymers.
2. They are all heteropolymers.
3. They have molecular weight between 18 and 800 daltons.
4. All of them are biomacromolecules.
Subtopic: Element Analysis |
79%
Level 2: 60%+
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