Genetics, Biotechnology & Nanotechnology

Study Material

Paper Prelims

PYQ Count 12

1. Genetics moves from DNA as hereditary material to codons, chromosomes, DNA fingerprinting, gene editing and population genomics.
2. Har Gobind Khorana won the 1968 Nobel with Nirenberg and Holley for interpreting the genetic code.
3. The Genome India Project announced completion of 10,000 Indian genome sequences in 2024, with data linked to IBDC Faridabad.
4. Indian biotechnology is institutionally anchored in DBT, BIRAC, national vaccine platforms, BioE3 and the National Biopharma Mission.
5. Covaxin and Rotavac show indigenous vaccine capacity; Vaccine Maitri converted vaccine production into health diplomacy.
6. Bt cotton remains the major commercial GM crop approval anchor for Indian agriculture biotechnology.
7. Nanotechnology works at roughly 1-100 nm; RAS has repeatedly tested quantum dots, quantum wells, nanoparticles and MOEMS.
8. Rajasthan hooks are Sitapura biotech facilities, BISR Jaipur, Banasthali Vidyapith, MNIT Jaipur and tribal sickle-cell screening districts.

Key facts

Har Gobind Khorana won the 1968 Nobel with Nirenberg and Holley for interpreting the genetic code.
The Genome India Project announced completion of 10,000 Indian genome sequences in 2024, with data linked to IBDC Faridabad.
Indian biotechnology is institutionally anchored in DBT, BIRAC, national vaccine platforms, BioE3 and the National Biopharma Mission.
Nanotechnology works at roughly 1-100 nm; RAS has repeatedly tested quantum dots, quantum wells, nanoparticles and MOEMS.

Key Points at a Glance

1
Genetics moves from DNA as hereditary material to codons, chromosomes, DNA fingerprinting, gene editing and population genomics.
2
Har Gobind Khorana won the 1968 Nobel with Nirenberg and Holley for interpreting the genetic code.
3
The Genome India Project announced completion of 10,000 Indian genome sequences in 2024, with data linked to IBDC Faridabad.
4
Indian biotechnology is institutionally anchored in DBT, BIRAC, national vaccine platforms, BioE3 and the National Biopharma Mission.
5
Covaxin and Rotavac show indigenous vaccine capacity; Vaccine Maitri converted vaccine production into health diplomacy.
6
Bt cotton remains the major commercial GM crop approval anchor for Indian agriculture biotechnology.
7
Nanotechnology works at roughly 1-100 nm; RAS has repeatedly tested quantum dots, quantum wells, nanoparticles and MOEMS.
8
Rajasthan hooks are Sitapura biotech facilities, BISR Jaipur, Banasthali Vidyapith, MNIT Jaipur and tribal sickle-cell screening districts.

How do genetic code, chromosomes and inheritance work?

Genetic code, chromosomes and inheritance work by storing information in DNA, packaging it into chromosomes, transmitting it through gametes, and reading codons through RNA to build proteins. Genetics begins with the movement of information from DNA to RNA to protein, so a good exam answer should connect the molecule, the chromosome and the inherited trait in one chain. According to the National Human Genome Research Institute, the DNA in a single human cell would stretch about 6 feet if all its DNA molecules were unwound and placed end to end.

Core Concepts

DNA stores hereditary information in four bases.
Triplet codon links three bases with one amino acid or a stop signal during protein synthesis.
Chromosomes package DNA; humans have 46 chromosomes in 23 pairs.
Trisomy 21 is an extra copy of chromosome 21, the chromosomal basis of Down syndrome.
DNA fingerprinting rests on polymorphic DNA regions, especially short tandem repeats and variable number tandem repeats, not on blood group or fingerprint ridge patterns.

Nobel Anchors

Anchor	Prize detail	Relevance
Har Gobind Khorana - Genetic Code	In 1968 he shared the Nobel Prize in Physiology or Medicine with Marshall Nirenberg and Robert Holley	Interpreting the genetic code and its function in protein synthesis
Venkatraman Ramakrishnan - Ribosome structure	The 2009 Chemistry prize recognised studies of ribosome structure and function	Links codons with the ribosome that reads messenger RNA

Rajasthan Link

Sickle-cell disease screening is relevant in tribal belts of Banswara, Dungarpur, Udaipur and Pratapgarh, where inherited haemoglobin variants matter in public health.
Exam use: Rajasthan examples should be used to localise inheritance and public health, not to replace the molecular core.

Key Terms

Term	Meaning
Mutation	Changes DNA sequence
Allele	Names alternative gene forms
Genotype	Names genetic constitution
Phenotype	Names visible expression shaped by genes and environment

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PREDICTED Predicted RAS Questions

Based on PYQ trends and 2026 syllabus analysis

1 MCQ Which Indian-origin scientist shared the 1968 Nobel Prize for interpretation of the genetic code and its function in protein synthesis?

A Har Gobind Khorana Correct answer
B Venkatraman Ramakrishnan
C C. V. Raman
D Subrahmanyan Chandrasekhar

Explanation

Har Gobind Khorana is the 1968 genetic-code anchor, with Nirenberg and Holley. Ramakrishnan belongs to ribosome structure in 2009, Raman to light scattering in 1930, and Chandrasekhar to stellar structure in 1983.