Molecular Basis of Inheritance is a Class 12 Biology chapter that carries about 6.2% of the Biology questions in NEET. Practise it with 73 questions covering 7 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, Molecular Basis of Inheritance had 71 questions, about 5.5 a year. The most in one paper was 9, in NEET 2021.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 4 |
| NEET 2025 | 8 |
| NEET 2024 | 7 |
| NEET 2023 | 6 |
| NEET 2022 | 6 |
| NEET 2021 | 9 |
| NEET 2020 | 4 |
| NEET 2019 | 4 |
| NEET 2018 | 5 |
| NEET 2017 | 7 |
| NEET 2016 | 4 |
| Re-AIPMT 2015 | 2 |
| AIPMT 2014 | 5 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Okazaki fragments are short DNA segments formed during:
Answer: C. DNA replication
Why: Because DNA polymerase synthesizes only in the 5'→3' direction, the lagging strand is replicated discontinuously in short segments called Okazaki fragments, later joined by DNA ligase.
A nucleosome consists of about 200 base pairs of DNA wound around:
Answer: C. a histone octamer, with two molecules each of H2A, H2B, H3 and H4
Why: Histone H1 binds the linker DNA between nucleosomes.
In the lac operon, the gene i codes for:
Answer: B. the repressor protein
Why: The repressor binds to the operator.
H. G. Khorana contributed to the cracking of the genetic code by:
Answer: D. chemically synthesising RNA molecules with defined repeating sequences
Why: He used them to find which amino acids each codon specified.
The Human Genome Project aimed to determine:
Answer: A. the complete sequence of the 3 × 10⁹ base pairs of the human genome
Why: The project was completed in 2003.
The strand of DNA that has the same base sequence as the mRNA (with T in place of U) is the:
Answer: D. coding (non-template) strand
Why: The template strand is read by the RNA polymerase.
A polysome (polyribosome) is:
Answer: B. a group of ribosomes attached to a single mRNA
Why: It allows many copies of the polypeptide to be made at the same time.
The strand of DNA that is synthesised continuously during replication is the:
Answer: A. leading strand
Why: The lagging strand is made as Okazaki fragments.
Molecular Basis of Inheritance carries about 6.2% of the Biology questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 71 times, about 5.5 questions a year.
Molecular Basis of Inheritance is a Class 12 Biology chapter in the NCERT syllabus.
NeetVictory has 73 practice questions on Molecular Basis of Inheritance, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
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