2019 source guide · Biology

NEET 2019 Biology Genetics Questions

Use this page to connect the official 2019 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 275 verified questions →Check official NTA archive ↗

What to master

inheritance patterns, linkage, molecular genetics, gene expression and variation.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 4/5

When lactose is added to a culture of E. coli growing in a medium without glucose, transcription of the lac operon begins within minutes. The immediate molecular event responsible for this switch is

A. binding of RNA polymerase to the operator region
B. hydrolysis of the repressor protein by β-galactosidase
C. binding of the inducer to the repressor, which then detaches from the operator
D. removal of the promoter sequence by the permease protein

Example 2 · difficulty 3/5

A tRNA molecule displays the anticodon 3'-UAC-5' in its anticodon loop. During translation, which mRNA codon will it recognise, and which amino acid does that codon specify?

A. 5'-AUG-3'; methionine
B. 5'-CAU-3'; histidine
C. 5'-UAC-3'; tyrosine
D. 5'-ATG-3'; methionine

Example 3 · difficulty 2/5

DNA fingerprinting exploits regions of the human genome that show the greatest variation between individuals. These regions consist mainly of

A. highly conserved exons shared by all individuals
B. genes encoding membrane proteins with numerous alleles
C. tandemly repeated ribosomal RNA genes
D. repetitive, non-coding satellite sequences such as VNTRs

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

Principles of Inheritance and Variation →Molecular Basis of Inheritance →

Frequently asked questions

Are these official NEET 2019 Biology Genetics PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2019 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.