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Mention two important functions of nucleic acids.
Concept: Introduction of Nucleic Acids
Assertion (A): Proteins are polymers of α-amino acids connected by a peptide bond.
Reason (R): A tetrapeptide contains 4 amino acids linked by 4 peptide bonds.
Concept: Biomolecules in the Cell > Proteins >> Structure of Proteins
Which of the following statements is not true about glucose?
Concept: Biomolecules in the Cell > Carbohydrates >> Preparation of Glucose
Assertion (A): Vitamin C cannot be stored in our body.
Reason (R): Vitamin C is fat soluble and is excreted from the body in urine.
Concept: Vitamins >> Classification of Vitamins
β-pleated sheet structure in proteins refers to ______.
Concept: Biomolecules in the Cell > Proteins >> Structure of Proteins
Assertion (A): The backbone of DNA and RNA molecules is a chain consisting of heterocyclic base, pentose sugar and phosphate group.
Reason (R): Nucleotides and nucleosides mainly differ from each other in the presence of phosphate group.
Concept: Introduction of Nucleic Acids
The vitamins which can be stored in our body are ______.
Concept: Vitamins >> Classification of Vitamins
Assertion: Enzymes are very specific for a particular reaction and for a particular substrate.
Reason: Enzymes are biocatalysts.
Select the most appropriate answer from the options given below:
Concept: Introduction of Enzymes
DNA fingerprinting is used to determine paternity of an individual. Which property of DNA helps in the procedure?
Concept: Biomolecules in the Cell > Nucleic Acids >> Structure of Nucleic Acids
What structural change will occur when a native protein is subjected to change in pH?
Concept: Biomolecules in the Cell > Proteins >> Denaturation of Proteins
When sucrose is hydrolysed the optical rotation values are measured using a polarimeter and are given in the following table:
| S. No. | Time (hours) | Specific Rotation |
| 1 | 0 | + 66.5° |
| 2 | ∞ | - 39.9° |
- Account for the two specific rotation values.
- What is the specific name given to sucrose based on the above observation?
- One of the products formed during the hydrolysis of sucrose is a glucose, that reacts with hydroxylamine to give compound A. Identify compound A.
Concept: Biomolecules in the Cell > Carbohydrates >> Disaccharides
Which of the following is a natural polymer ? Buna-S, Proteins, PVC
Concept: Types of Polymerisation Reactions - Addition Polymerisation or Chain Growth Polymerisation
Write the name of monomers used for getting the following polymers : Bakelite
Concept: Introduction to Polymers >> Classification of Polymers Based on Structure
Based on molecular forces, what type of polymer is neoprene?
Concept: Introduction to Polymers >> Some Important Polymers
Which of the following is a fibre? Nylon, neoprene, PVC
Concept: Types of Polymerisation Reactions - Condensation Polymerisation Or Step Growth Polymerisation
Write the names and structures of the monomers of the following polymers: Buna-S
Concept: Introduction to Polymers >> Classification of Polymers Based on Mode of Polymerisation
Write the names and structures of the monomers of the following polymers: Dacron
Concept: Introduction to Polymers >> Classification of Polymers Based on Mode of Polymerisation
Write the names and structures of the monomers of the following polymers:
(i) Terylene
(ii) Bakelite
(iii) Buna-S
Concept: Introduction to Polymers >> Classification of Polymers Based on Structure
Arrange the following polymers in increasing order of their intermolecular forces:
Polyvinylchloride, Neoprene, Terylene
Concept: Introduction to Polymers >> Classification of Polymers Based on Molecular Forces
What is the significance of number of 6,6 in the polymer nylon-6,6?
Concept: Types of Polymerisation Reactions - Condensation Polymerisation Or Step Growth Polymerisation
