JAC Class 12 Biology Question Paper 2014 with Solution

About this paper

This is the Jharkhand Academic Council (JAC) Class 12 Biology paper from the 2014 board examination, with answers worked under each question. Section A covers Botany and Section B Zoology, and each has the same four groups: ten multiple-choice questions, three very short answer questions, three short answer questions and two long answer questions with 'Or' alternatives. The paper makes heavy use of match-the-columns items with answer codes, along with fill-in-the-blank questions and an embryo-sac diagram to label. Long answers cover Mendel's monohybrid cross, biomagnification of DDT, oogenesis and Darwin's finches. Marks and time are not printed on this copy.

Exam

JAC Class 12

Subject

Biology

Year

2014

Pages

3

Answers included

Yes

Paper pattern

• Group A

  Questions 1–10 in each section: multiple choice

• Group B

  Questions 11–13 in each section: very short answers, including fill-in-the-blank items

• Group C

  Questions 14–16 in each section: short answers, including match-the-columns and diagram labelling

• Group D

  Questions 17–18 in each section: long answers, each with an 'Or' alternative

Topics covered

• Reproduction in flowering plants
• Pollination
• Plant breeding
• Molecular basis of inheritance
• Mendelian inheritance
• Sex determination
• Evolution and Darwin's finches
• Human reproduction and oogenesis
• Human health and disease
• Biotechnology and genetic engineering
• Ecosystem and decomposition
• Environmental issues and biomagnification

Questions from this paper

1. The mole percentage of adenine in a double-stranded DNA is 30. What will be the mole percentage of cytosine in the DNA?
2. Which variety of wheat was used as the source for breeding the 'Sarbati Sonora' variety, and who developed this variety?
3. Explain Mendel's monohybrid cross and mention the phenotypic and genotypic ratios obtained.
4. What is male heterogamety? Give two examples of male heterogamety.
5. What is biomagnification? Explain it with suitable examples and illustrations.
6. Mention three observations on which Darwin based his theory of natural selection, and describe natural selection in Darwin's finches.