Structure of DNA and RNA - Competitive Exam Insights

Structure of DNA and RNA - Competitive Exam Level

Q. What is the function of ribosomal RNA (rRNA)?

A. Carries genetic information
B. Forms the core of ribosome structure
C. Transports amino acids
D. Catalyzes peptide bond formation

Solution

Ribosomal RNA (rRNA) forms the structural and functional core of ribosomes, which are essential for protein synthesis.

Correct Answer: B — Forms the core of ribosome structure

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Q. What is the role of messenger RNA (mRNA)?

A. To store genetic information
B. To transport amino acids
C. To carry genetic information from DNA to ribosomes
D. To form the structure of ribosomes

Solution

Messenger RNA (mRNA) carries genetic information from DNA to the ribosomes for protein synthesis.

Correct Answer: C — To carry genetic information from DNA to ribosomes

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Q. Which of the following describes a mutation?

A. A change in the DNA sequence
B. A process of DNA replication
C. A type of RNA molecule
D. A form of genetic inheritance

Solution

A mutation is defined as a change in the DNA sequence that can lead to alterations in gene function.

Correct Answer: A — A change in the DNA sequence

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Q. Which of the following is a characteristic of DNA?

A. Single-stranded
B. Contains ribose sugar
C. Double helix structure
D. Contains uracil

Solution

DNA is characterized by its double helix structure, consisting of two strands wound around each other.

Correct Answer: C — Double helix structure

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This section is designed for students preparing for competitive examinations where precision, depth, and speed are essential. It focuses on the most frequently tested and high-yield aspects of DNA and RNA structure, with strong emphasis on NCERT line-based understanding and exam-oriented practice.

In this section, you will study:

High-yield features of DNA double helix and base pairing
Tricky distinctions between DNA and RNA structure
Structural variations such as A-DNA, B-DNA, and Z-DNA
NCERT-based MCQs on nucleotide composition and polarity
Assertion–reason and multi-statement questions
Common conceptual traps related to nucleic acid structure
Previous year question patterns and exam-focused practice sets

The content is structured to improve accuracy, conceptual clarity, and exam temperament, helping students confidently tackle high-difficulty MCQs and theory-based questions in NEET and other competitive entrance exams.

Build a competitive edge by mastering the structure of DNA and RNA through focused, exam-oriented preparation.

Structure of DNA and RNA - Competitive Exam Level

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