Biology · CBSE

Board exam

2026Class 12Set 57/1/170 marks33 questions

14 of its 33 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.

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Source: CBSE Board Examination 2026, Class 12 Biology (044), paper 57/1/1, published by CBSE. CBSE's ZIP of every set

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14 questions

Q1Section A1 mark
$Identify the plant in which emasculation is not required for artificial hybridization.$
1. A $Rice$
2. B $Wheat$
3. C $Pea$
4. D $Papaya$
Q2Section A1 mark
$Which of the following is not a component of immune system ?$
1. A $Lymphocytes$
2. B $Plasma Proteins$
3. C $Red Blood Cells$
4. D $Bone Marrow$
Q4Section A1 mark
$Select the mismatched pair :$
1. A $Mega diversity countries in the world - 12$
2. B $Genetically different strains of rice in India - Less than 1000$
3. C $Robert Mays estimation on global species diversity - 7 million species worldwide$
4. D $Zoological parks - Ex-situ conservation$
Q5Section A1 mark
$Pomato was produced by fusing protoplasts of$
1. A $Tomato and Potato$
2. B $Pomegranate and Tomato$
3. C $Pomegranate and Potato$
4. D $Pomegranate, Potato and Tomato$
Q6Section A1 mark
$In an ecosystem, different species occupy different levels and vertical distribution of species is found. This is called _________.$
1. A $Stratification$
2. B $Layering$
3. C $Fragmentation$
4. D $Population$
Q7Section A1 mark
$Which of the following sacred groves is found in Meghalaya ?$
1. A $Jaintia hills$
2. B $Bastar$
3. C $Chanda$
4. D $Sarguja$
Q10Section A1 mark
$The idea of use and disuse of organs for evolution of organism was proposed by$
1. A $Charles Darwin$
2. B $Thomas Malthus$
3. C $Hugo De Vries$
4. D $Lamarck$
Q11Section A1 mark
$Which of the following statements about plasmids is incorrect ?$
1. A $Plasmids have the ability to replicate within the bacterial cell.$
2. B $Their replication is controlled by chromosomal DNA.$
3. C $They are autonomously replicating circular extra-chromosomal DNA.$
4. D $They often carry antibiotic resistant genes.$