Select Chapter Topics:
Q. No.Which biomolecule always contains phosphorus?
1.
Steroids
2.
Triglycerides
3.
Phospholipids
4.
Terpenes
Subtopic: Element Analysis |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Enzymes show specificity because
| 1. | they act only at pH 14 |
| 2. | they convert all molecules equally |
| 3. | active site recognises substrate precisely |
| 4. | they alter equilibrium of the reaction |
Subtopic: Enzymes |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
The R group in amino acids determines
| 1. | ability to form phosphodiester bonds |
| 2. | peptide bond formation only |
| 3. | chemical properties and reactivity |
| 4. | presence of fatty acids |
Subtopic: Amino Acids |
84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match List-I (Carbohydrate Type) with List-II (Example)
Codes:
1. A–1, B–4, C–3, D–2
2. A–4, B–3, C–2, D–1
3. A–1, B–4, C–2, D–3
4. A–4, B–3, C–1, D–2
| List-I | List-II | ||
| A. | Disaccharide | 1. | Glucose |
| B. | Storage polysaccharide | 2. | Cellulose |
| C. | Structural polysaccharide | 3. | Starch |
| D. | Reducing sugar | 4. | Maltose |
1. A–1, B–4, C–3, D–2
2. A–4, B–3, C–2, D–1
3. A–1, B–4, C–2, D–3
4. A–4, B–3, C–1, D–2
Subtopic: Carbohydrates |
86%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
All of the following statements regarding the chemical and physical properties of amino acids are correct EXCEPT:
| 1. | The properties of amino acids depend on the amino group, carboxyl group and the R functional group. |
| 2. | Amino acids can be classified as acidic, basic or neutral based on the number of amino and carboxyl groups present. |
| 3. | Aromatic amino acids include tyrosine, phenylalanine and tryptophan. |
| 4. | The structure of amino acids remains unchanged in solutions of different pH due to the non-ionizable nature of –NH₂ and –COOH groups. |
Subtopic: Amino Acids |
85%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
All of the following statements regarding nitrogen bases, nucleosides, nucleotides, and nucleic acids are correct EXCEPT:
| 1. | Nitrogen bases such as adenine, guanine, cytosine, uracil, and thymine contain heterocyclic rings. |
| 2. | When a nitrogen base is attached to a sugar molecule, the compound formed is called a nucleoside. |
| 3. | Nucleotides are formed when a nitrogen base is directly esterified to a phosphate group without sugar involvement. |
| 4. | DNA and RNA are nucleic acids, composed exclusively of nucleotides, and can function as genetic material. |
Subtopic: Nucleic Acid | Nucleic Acid: Nucleotides |
88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Adult human haemoglobin (Hb) is constituted by _____ subunits of α type and _____ subunits of β type.
| 1. | one; three | 2. | three; one |
| 3. | two; two | 4. | four; zero |
Subtopic: Structural Organisation of Proteins |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Enzymes differ from ordinary chemical catalysts primarily because they:
| 1. | Increase the activation energy of reactions |
| 2. | Are highly specific in their action and function under mild conditions |
| 3. | Are consumed during the course of reactions |
| 4. | Function effectively only at very high temperatures |
Subtopic: Enzymes |
86%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Examples of biomolecule types include:
| 1. | Amino acid: glycine; Sugar: glucose; Nucleotide: ATP |
| 2. | Fatty acid: palmitic acid; Protein: insulin; Polysaccharide: starch |
| 3. | Enzyme: pepsin; Hormone: thyroxine; Vitamin: ascorbic acid |
| 4. | All of the above |
Subtopic: Amino Acids | Proteins | Carbohydrates | Properties of Enzymes | Enzyme Introduction |
88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Polysaccharides correctly matched with their sources:
| 1. | Cotton fiber - cellulose; Cockroach exoskeleton - chitin |
| 2. | Liver - glycogen; Peeled potato - starch |
| 3. | Each represents different structural and storage functions |
| 4. | All of the above |
Subtopic: Carbohydrates: Introduction | Carbohydrates: Glycosidic Bond & Disaccharide | Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.