ISC 2019 Biology Question Paper for Class 12

About this paper

This is ISC Class 12 Biology Paper 1 (Theory), code 863A, from the 2019 board examination set by CISCE. The footer reads 1219-863A. It carries 70 marks, runs for three hours plus fifteen minutes of reading time, and has 18 compulsory questions on five printed pages. Part I is one 20-mark question: eight short answers, four multiple-choice items, four scientists' contributions, two definitions and two reasons. Part II has Section A (seven two-mark questions), Section B (seven three-mark questions) and Section C (three five-mark questions). Internal choices are given in two questions each in Sections A and B, and in all three questions of Section C. This copy has the questions only.

Exam

ISC Class 12

Subject

Biology

Year

2019

Paper code

863A

Maximum marks

70

Time allowed

3 hours + 15 min reading

Questions

18

Pages

5

Answers included

No, questions only

Paper pattern

• Part I

  20 marks

  Question 1, 20 marks: eight short answers, four multiple-choice items, four scientists' contributions, two definitions and two reasons

• Part II, Section A

  14 marks

  Questions 2–8, two marks each; internal choice in two questions

• Part II, Section B

  21 marks

  Questions 9–15, three marks each; internal choice in two questions

• Part II, Section C

  15 marks

  Questions 16–18, five marks each, each with an internal choice

Topics covered

• Human health and disease
• Human reproduction
• Reproductive health
• Principles of inheritance and variation
• Molecular basis of inheritance
• Evolution
• Organisms and populations
• Ecosystem
• Biodiversity and conservation
• Biotechnology and its applications
• Microbes in human welfare
• Sexual reproduction in flowering plants

Questions from this paper

1. Name the antibody which is most effective in allergies.
2. What is the function of GEAC?
3. How many chromosomes are present in the meiocytes of a fruit fly?
4. Give the scientific term used for the preservation of germplasm at a very low temperature.
5. What is a single cell protein? How is it significant for human welfare?
6. A homozygous pea plant with round seed coat and yellow cotyledons is crossed with a homozygous pea plant having wrinkled seed coat and green cotyledons. Give the gametes of the F1, the dihybrid phenotypic ratio, and the Mendelian principle involved.