Day 33: MH HSC Class 12 Biology

5 questions. Try each one first, then open its answer.

Question 1

Human Health and Diseases. Asked once: Jul 2024

Q. 12

Match cells of immune system in column-I and their functions in column-II and rewrite it. Column-I Column-II (i) Cytotoxic T cells (a) Activation of helper T cells (ii) Plasma cells (b) Blood group antigens (iii) Antigen presenting cells (c) Secretion of perforins (iv) Red blood cells (d) Antibody production

Column-I	Column-II
(i) Cytotoxic T cells	(a) Activation of helper T cells
(ii) Plasma cells	(b) Blood group antigens
(iii) Antigen presenting cells	(c) Secretion of perforins
(iv) Red blood cells	(d) Antibody production

Inheritance and Variation. Asked once: Jul 2024

Q. 19

Select and fill in the boxes (i) to (vi) from given list of options. List of options — Sickle cell anaemia, Widow’s peak, Flower colour of Mirabilis, Human blood groups, Coat colour of cattle, Klinefelter’s syndrome. Genetic trait Example (a) Incomplete dominance (i) _____(b) Pleiotropy (ii) _____(c) Codominance (iii) _____(d) Multiple allelism (iv) _____(e) Sex chromosomal disorder (v) _____(f) Autosomal disorder (vi) _____

Question 3
Molecular Basis of Inheritance. Asked once: Jul 2024
Q. 1(iii) $Protein digesting enzyme is ______.$
Tap an option to check your answer.
Question 4
Origin and Evolution of Life. Asked once: Jul 2025
Q. 1(iv) $Connecting link between amphibians and reptiles is _____.$
Tap an option to check your answer.
Question 5
Plant Growth and Mineral Nutrition. Asked once: Feb 2026
Q. 2(v) $Define the term chlorosis.$