ISC 2014 Biology Practical Question Paper for Class 12

About this paper

This is ISC Class 12 Biology Paper 2 (Practical) from the 2014 board examination, code 863B. The footer reads 1214-863 B. It runs for three hours plus fifteen minutes of reading time and has five questions, all to be answered. Question 1 is a floral study of specimens D-41 and D-42, with longitudinal sections, families, floral diagrams and floral formulae. Question 2 counts gas bubbles from a twig of D-43 placed 5 cm, 15 cm and 25 cm from a lamp. Question 3 is a safranin-stained transverse section of D-44, and Question 4 is spotting of specimens A to E, with no more than three minutes a spot. Question 5 is the project and the Biology Practical File, shown to the Visiting Examiner. This copy has the questions only.

Exam

ISC Class 12

Subject

Biology Practical

Year

2014

Paper code

863B

Time allowed

3 hours + 15 min reading

Questions

5

Pages

4

Answers included

No, questions only

Paper pattern

• Question 1

  Floral study of specimens D-41 and D-42: longitudinal sections, family characters, floral diagram and floral formulae

• Question 2

  Photosynthesis set-up with twigs of D-43; gas bubbles counted at 5 cm, 15 cm and 25 cm from the light

• Question 3

  Thin transverse section of specimen D-44, stained with safranin and mounted in glycerine

• Question 4

  Spotting: identify specimens A to E, with two reasons and a labelled diagram each; not more than three minutes a spot

• Question 5

  Project and Biology Practical File, shown to the Visiting Examiner

Topics covered

• Floral morphology
• Androecium and gynoecium
• Floral formula and floral diagram
• Photosynthesis and light intensity
• Plant anatomy
• Specimen spotting

Questions from this paper

1. Describe the floral characteristics of flower specimens D-41 and D-42 in semi-technical terms. Details of the individual whorls are not required.
2. Cut a longitudinal section of D-41, place a cut surface on moist filter paper, and draw a neat labelled diagram of it.
3. Name the families to which D-41 and D-42 belong, and write two characteristic features of each family.
4. Write the floral formulae of D-41 and D-42.
5. In the photosynthesis set-up, count the gas bubbles evolved in one minute with the twig 5 cm, 15 cm and 25 cm from the lamp, and state what is concluded.
6. Cut a thin transverse section of specimen D-44, stain it with safranin, mount it in glycerine, and identify the specimen with two reasons.