2020 source guide · Biology

NEET 2020 Biology Chemical Coordination and Integration Questions

Use this page to connect the official 2020 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 2/5

Cortisol reaches a responsive cell. Which event is most consistent with its steroid nature?

A. It crosses the cell membrane and binds an intracellular receptor that can regulate gene expression
B. It remains outside the cell and serves as a nutrient for receptor synthesis
C. It enters an exocrine duct and activates digestive enzymes there
D. It binds only to a receptor embedded in the cell wall

Example 2 · difficulty 3/5

In a normal thyroid control loop, a sustained rise in circulating thyroid hormones will most likely produce which change?

A. Increased release of both hypothalamic and pituitary stimulatory hormones
B. Reduced hypothalamic and pituitary stimulation of the thyroid
C. Immediate conversion of the thyroid into an exocrine gland
D. Loss of receptors from every thyroid-hormone target cell

Example 3 · difficulty 2/5

How do hypothalamic releasing hormones primarily regulate the anterior pituitary?

A. They travel through exocrine ducts and are poured into the pharynx
B. They are stored in thyroid follicles before entering general circulation
C. They reach the anterior pituitary through a portal circulatory connection and stimulate selected secretions
D. They diffuse into the posterior pituitary and are converted into steroid hormones

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 2020 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 2020 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.