JAC Class 12 Biology Question Paper 2015 with Solution

About this paper

This is the Jharkhand Academic Council (JAC) Class 12 Biology paper from the 2015 board examination, with answers given under the questions. Section A is Botany and Section B is Zoology; each has ten multiple-choice questions in Group A, three very short answers in Group B, three short answers in Group C and two long answers in Group D, with 'Or' alternatives in three of the four long answers. Match-the-columns items with answer codes appear in both sections, and the Zoology part asks students to label a DNA replication fork. One Botany question asks for the most polluted river of Jharkhand. Marks and time are not printed, and a few printed answers look wrong, so check them against your textbook.

Exam

JAC Class 12

Subject

Biology

Year

2015

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

• 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, most with an 'Or' alternative

Topics covered

• Reproduction in flowering plants
• Seed dormancy
• Molecular basis of inheritance
• Mendelian inheritance and linkage
• Sex-linked inheritance
• Biotechnology and its applications
• Ecosystem and ecological pyramids
• Nitrogen cycle
• Environmental issues
• Human reproduction
• Human health and disease
• Microbes in human welfare

Questions from this paper

1. What is the function of DNA ligase?
2. What is the significance of double fertilisation?
3. Write two advantages of seed dormancy.
4. What is an ecological pyramid? Describe the pyramid of numbers.
5. What is amoebiasis? Write the name of its causative agent.
6. What is a test cross? Show the 1 : 1 phenotypic ratio in a monohybrid test cross through a Punnett square.