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Q. No.The ionizable nature of –NH2 and –COOH groups in amino acids allows them to exist in different ionic forms depending on the pH of the solution. What is the term used to describe the form of an amino acid where it has both a positive and a negative charge?
1. Anion
2. Cation
3. Zwitterion
4. Neutral molecule
1. Anion
2. Cation
3. Zwitterion
4. Neutral molecule
Subtopic: Amino Acids |
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Which of the following is a basic amino acid?
1. Tyrosine
2. Phenylalanine
3. Lysine
4. Tryptophan
Subtopic: Amino Acids |
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Many elements are found in living organisms either free or in the form of compounds. Which one of the following is not found in living organisms?
| 1. | Silicon | 2. | Magnesium |
| 3. | Iron | 4. | Sodium |
Subtopic: Introduction |
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Aromatic amino acids include:
1. Alanine, Valine, Leucine
2. Lysine, Arginine, Histidine
3. Phenylalanine, Tyrosine, Tryptophan
4. Serine, Threonine, Cysteine
1. Alanine, Valine, Leucine
2. Lysine, Arginine, Histidine
3. Phenylalanine, Tyrosine, Tryptophan
4. Serine, Threonine, Cysteine
Subtopic: Amino Acids |
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Identify the fatty acid\(\mathrm{CH_3-(CH_2)_{14}-COOH}\)
| 1. | Arachidonic acid | 2. | Linoleic acid |
| 3. | Linolenic acid | 4. | Palmitic acid |
Subtopic: Lipids |
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Which of the following is the simplest amino acid?
1. Tyrosine
2. Asparagine
3. Glycine
4. Alanine
Subtopic: Different Amino Acids |
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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 |
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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 |
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Which biomolecule always contains phosphorus?
| 1. | Steroids | 2. | Triglycerides |
| 3. | Phospholipids | 4. | Terpenes |
Subtopic: Element Analysis |
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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 |
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