2019 source guide · Biology

NEET 2019 Biology Chemical Coordination and Integration 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 100 verified questions →Check official NTA archive ↗

What to master

endocrine glands, hormones, feedback and common endocrine disorders.

Original practice preview

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

Example 1 · difficulty 1/5

Which description best fits a hormone in the NCERT account of chemical coordination?

A. A nutrient that supplies energy after reaching every body cell
B. A non-nutrient chemical messenger produced in trace amounts for intercellular communication
C. An enzyme that catalyses extracellular digestion and is consumed in the reaction
D. A structural molecule that permanently remains in the gland that formed it

Example 2 · difficulty 2/5

A hormone circulates past liver, muscle and bone cells, but only muscle cells possess its specific receptor. What is the most direct prediction?

A. All three cell types must respond because all receive the hormone
B. Only liver cells respond because they are metabolically active
C. Muscle cells show the specific hormonal response
D. Bone cells convert the hormone into a receptor before responding

Example 3 · difficulty 2/5

Which sequence correctly represents the usual action of a peptide hormone on its target cell?

A. Hormone crosses the plasma membrane → binds chromosomal DNA directly → forms a membrane receptor
B. Hormone enters the nucleus → is converted into a steroid → opens a duct
C. Hormone binds an intracellular receptor → receptor is secreted → extracellular enzyme is activated
D. Hormone binds a membrane receptor → intracellular second messengers are generated → cellular activity changes

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

Chemical Coordination and Integration →

Frequently asked questions

Are these official NEET 2019 Biology Chemical Coordination and Integration 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.