About NCERT Exemplar Solutions for Class 12 Biology Chapter 6: Molecular Basis of Inheritance
The NCERT exemplar Solutions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance focus on the chemical and structural foundation of genetic information. This chapter is critical for students preparing for board exams and medical entrance tests, as it links genetics with molecular Biology, biotechnology, and evolution. Read the NCERT textbook and solve questions with the help of NCERT solutions for class 12 Biology.
The chapter starts with an explanation of DNA and RNA as genetic material. The solutions cover experiments by Griffith, Avery, Hershey-Chase, and Meselson-Stahl, which established DNA as the carrier of hereditary information. Students learn about the double-helix structure of DNA, base pairing rules, and structural differences between DNA and RNA. Next, the chapter explores replication, transcription, and translation, providing a complete view of gene expression. The exemplar solutions describe DNA replication mechanisms in prokaryotes and eukaryotes, emphasizing semi-conservative replication. Transcription in the nucleus, RNA processing, and translation in the ribosome are explained step by step, making complex processes understandable. The chapter also introduces regulation of gene expression, including operon models in prokaryotes like the lac operon and trp operon. The solutions highlight the importance of gene regulation in cellular function and adaptation. Mutation and DNA repair mechanisms are another significant topic. Students learn about point mutations, frameshift mutations, and chromosomal abnormalities, as well as repair systems like photoreactivation and excision repair. Exemplar solutions link these mutations to genetic disorders and evolution. Finally, the solutions cover the human genome project and DNA fingerprinting, connecting molecular biology to real-world applications in medicine, forensics, and biotechnology. By solving these exemplar questions, students gain clarity on gene structure, function, and expression. The solutions encourage higher-order thinking, enabling learners to relate molecular genetics with inheritance, evolution, and practical applications in biotechnology.