CBSE Class 12 Biology — MCQs
Multiple choice questions from all previous year papers.
12 questions found
2026(12 questions)
- 1
Identify the plant in which emasculation is not required for artificial hybridization.
1 mark· A· Emasculation in Artificial Hybridization - 9
Match Column-I with Column-II and choose the correct option : Column-I: a. Biolistic gun, b. Chitinase, c. Ti, d. Ca++ Column-II: i. Bacterial cell, ii. Tumour inducing, iii. Animal cell, iv. Fungal cell, v. Plant cell
1 mark· A· Tools of Genetic Engineering (Matching) - 2
Which of the following is not a component of immune system ?
1 mark· A· Components of the Immune System - 3
Select the option that shows correct statements : (i) Corpus luteum secretes progesterone. (ii) Only FSH attains a peak level in middle of cycle. (iii) LH surge induces rupture of graafian follicle. (iv) Luteal phase of menstrual cycle is also called proliferative phase.
1 mark· A· Menstrual Cycle — Hormonal Events - 4
Select the mismatched pair :
1 mark· A· Biodiversity — Facts and Conservation - 5
Pomato was produced by fusing protoplasts of
1 mark· A· Somatic Hybridization — Pomato - 6
In an ecosystem, different species occupy different levels and vertical distribution of species is found. This is called _________.
1 mark· A· Ecosystem Structure — Stratification - 7
Which of the following sacred groves is found in Meghalaya ?
1 mark· A· Sacred Groves - 10
The idea of use and disuse of organs for evolution of organism was proposed by
1 mark· A· Theories of Evolution - 11
Which of the following statements about plasmids is incorrect ?
1 mark· A· Plasmids as Vectors - 12
Which connective tissue connects ovary to pelvic wall and uterus ?
1 mark· A· Female Reproductive System (Ovary Attachment) - 8
In the following figure, two ways of pairing of two homologous pairs of chromosomes are shown. Which of the following phenomena is expressed ?
1 mark· A· Independent Assortment of Chromosomes