KCET · BIOLOGY · STD 12 - 2. Human Reproduction

Pick the hormone which is not secreted by human placenta.

A hCG
B hPL
C Prolactin
D Estrogen

Verified Solution

Answer & Solution

Correct Answer

(C) Prolactin

Step-by-step Solution

Detailed explanation

(C) Prolactin,
The placenta produces hormones such as human chorionic gonadotrophin (hCG), human placental lactogen (hPL) or human chorionic somatotropin (hCS), progestogen, estrogen, etc., required to maintain pregnancy. Milk production is initiated by prolactin.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the scientist of Column I with their contributions in Column II.

Column I	Column II
(A) Griffith	(i) Lac operon
(B) Jacob and Monod	(ii) DNA is the genetic material
(C) Meselson and Stahl	(iii) Transforming principle
(D) Hershey and Chase	(iv) DNA replicates semiconservatively

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