CBSE 2025 · Region 1 · Set 1 · Q29 · 4 marks

Study the graphs given below for Case $\displaystyle 1$ and Case $\displaystyle 2$ showing different levels of certain hormones and answer the question that follows :

(a)

Which hormone is responsible for the peak observed in Case $\displaystyle 1$ and Case $\displaystyle 2$ ? Write one function of that hormone.

(b)

Write changes that take place in the ovary and uterus during follicular phase.

(b)

Student to attempt either sub-part (c) or (d) :

(c)OR(d)

Name the hormone Q of Case 2. Write one function of hormone Q.

CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.