CBSE Class 12 Biology — MCQs

Multiple choice questions from all previous year papers.

12 questions found

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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· $Independent Assortment of Chromosomes$