Biology Practical Class 11

The concepts of Class 11 biology practicals are very important because these theories are also included in class 12 final board examination. Students must learn these theories and concepts properly if they want to score good marks on their final exam.

The syllabus of the practical examination for biology class 11 is prepared by subject experts according to the latest syllabus of the Central Board of Secondary Education. Students must focus on the practical exam as it carries 30 marks. They must aim to get full marks in this section so that they can improve their overall performance.

Students must read all the theories and concepts before appearing the practical examination. They should practice the diagrams which are required for the practical experiments. The Biology Practical Class 11 experiments are given here to help students score better on the exam.

Class 11 Biology Experiments
Experiment A
1: Study and description of three locally available common flowering plants, one from each of the families Solanaceae, Fabacceae & Liliaceae.
2: Preparation and study of T.S. of dicot and monocot roots and stems (primary).
3: Study of osmosis by potato osmometer.
4: Study of plasmolysis in epidermal peels (e.g. Rhoeo Leaves).
5: Study of distribution of stomata in the upper and lower surface of leaves.
6: Comparative study of the rates of transpiration in the upper and lower surface of leaves.
7: Test for the presence of sugar, starch, proteins and fats. Detection in suitable plant and animal materials.
8: Separation of plant pigments through paper chromatography.
9: Study of the rate of respiration in flower buds/Leaf tissue and germinating seeds.
10: Test for presence of urea in urine.
11: Test for presence of sugar in urine.
12: Test for presence of albumin in urine.
13: Test for presence of bile salts in urine.
Experiment B
1: Study of the parts of a compound microscope.
2: Study of the specimens/slides/models and identification with reasons – Bacteria, Oscillatoria, Spirogyra, Rhizopus, mushroom, yeast, liverwort, moss, fern, pine, one monocotyledonous plant, one dicotyledonous plant and one lichen.
3: Study of virtual specimens/slides/models and identification with reasons. Amoeba, Hydra, liver fluke, Ascaris, leech, earthworm, prawn, silkworm, honeybee, snail, starfish, shark, rohu, frog, lizard, pigeon and rabbit.
4: Study of tissues and diversity in shapes and sizes of plant and animal cells (palisade cells, guard cells, parenchyma, collenchyma, sclerenchyma, xylem, phloem, squamous epithelium, muscle fibres and mammalian blood smear) through temporary/permanent slides.
5: Study of mitosis in onion root tip cells and animals cells (grasshopper) from permanent slides.
6: Study of different modifications in roots, stems and leaves.
7: Study and identification of different types of inflorescence (cymose and racemose).
8: Study of imbibition in seeds/raisins.
9: observation and comments on the experimental set up for showing: (a) Anaerobic respiration (b) Phototropism (c) Effect of apical bud removal (d) Suction due to transpiration
10: Study of human skeleton and different types of joints with the help of virtual images/models only.
11: Study of external morphology of cockroach through virtual images/models.


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stomach in epidermis

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Amoeba Proteus

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Pila Globosa

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Labeo Rohita

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Rana Tigrina

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Columba Livia

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