CBSE Class 10th 2024 : Science (Biology) Practical Based Questions with Answers

Prepare for CBSE Class 10th 2024 Science (Biology) Practical Exams with our comprehensive set of practical-based questions and answers. Boost your confidence and excel in your practical assessments with this valuable resource.

GENERAL INSTRUCTIONS:

Read the following instructions very carefully and strictly follow them:

(i) Questions 1 to 15 are of 1 mark and comprise multiple-choice questions.

(ii) Questions 16 to 20 are of 2 marks and comprise of short answer questions.

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Que 1. The diagram given below is the experimental set-up to show that carbon dioxide is given out during respirati In this set-up what does the test tube marked (X) contain?

(a) Water

(b) Lime water

(c) Potassium hydroxide

(d) Hydrochloric acid

Que 2. The seeds used in experiment to show that carbon dioxide is given out during respiration are:

a) dry seeds

b) boiled seeds

c) crushed seeds

d) germinating seeds

Que 3. In the experimental set-up, KOH solution has been kept in the flask to:

(a) react with water to generate oxygen.

(b) create a dry atmosphere for wet germinating seeds.

(c) absorb carbon dioxide so as to create a partial vacuum.

(d) remove impurities present in the air in the flask.

Que 4. Out of the four experimental set-ups shown below, which one will demonstrate the evolution of carbon dioxide during respiration of germinating seeds:

(a) A

(b) B

(c) C

(d) D

Que 5. The type of respiration shown by the germinating seeds to release carbon dioxide is:

(a) Anaerobic respiration

(b) Aerobic respiration

(c) oxidative phosphorylation

(d) Incomplete oxidation

Que 6. In an airtight experimental set-up which was used by you in the laboratory to study respiration in germinating seeds, the seeds obtained the oxygen for respiration from:

(a) air in the flask

(b) water in the beaker

(c) water in the germinating seeds

(d) water used for soaking the seed

Que 7. Which of the following substance is used to make all connections air tight in the experiment to show that carbon dioxide is produced during respiration:

(a) oil

(b) Vaseline

(c) ghee

(d) wax

Que 8. Name the cell components required for completion of aerobic respiration in a cell.

(a) Chloroplast and nucleus

(b) Ribosomes and ER

(c) Golgi body and lysosomes

(d) Cytoplasm and mitochondria 

Que 9. Mention the sequence of budding in hydra:

Correct sequence is

(a) A, B, C, D

(b) A, D, B, C

(c) C, A, B, D

(d) D, A, B, C

Que 10. Which of the following is not a feature of asexual reproduction?

(a) Two individuals of different sexes involved.

(b) No meiosis occurs.

(c) New individuals are genetically identical to the parents.

(d) Offsprings are clones of parents.

Que 11. Out of the following diagrams which one depicts a stage in binary fission of Amoeba?

a) A

(b) B

(c) C

(d) D

Que 12. The following figures illustrate binary fission in Amoeba in an incorrect sequence.

The correct sequence is:

(a) (I), (iii), (iv), (ii)

(b) (ii), (iii), (iv), (i)

(c) (iv), (iii), (ii), (i)

(d) (iii), (iv), (ii), (i)

Que 13. What do F and E represent in the given diagram?

(a) Parent yeast cells

(b) Daughter Amoebae

(c) Yeast buds

(d) Parent Amoebae

(a) I & II

( b) I & III

( c) I & IV

(d) II & IV

Que 15. A chain of yeast cells are formed because:

(a) yeast cells do not separate after budding*

(b) daughter cells are unable to survive without parent cells

(c) buds reproduce as soon as they are formed

(d) daughter cells stick together with the help of mucus

Que 16. After observing the prepared slides of binary fission in Amoeba and budding in yeast, the following observations were reported:

(a) Single cells of Amoeba and Yeast were undergoing binary fission and budding respective.

(b) Cytokinesis was observed in the Yeast cell.

(c) Elongated nucleus was piding to form two daughter nuclei in Amoeba.

(d) A chain of buds were observed due to reproduction in Amoeba.

The correct observation(s) is/are:

(a) d, a and c

(b) c and d

(c) b only

(d) a and c

Que 17. The following are the sketches of budding in yeast made by some students:

i)  Which of the sketch is not illustrative of budding in yeast is :

(a) I

(b) II

(c) III

(d) IV

ii)  Write the possible reason?

Que 18. The figures given are drawn from slides showing reproduction in yeast and Amoeba. What correct description can be given to these figures?

Que 19. A student is to conduct an experiment to show CO₂ is released during respiration. List two precautions that he/she must take for obtaining correct observation.

Que 20. Students were asked to observe the permanent slides showing different stages of budding in yeast under high power of a microscope.

a) Which adjustment screw (coarse/fine) were you asked to move to focus the slides?

(b) Draw three diagrams in correct sequence showing budding in yeast.

 – ANSWER KEY – 

Ans 1. (c) Potassium hydroxide

Ans 2. (d) germinating seeds

Ans 3. (c) absorb carbon dioxide so as to create a partial vacuum

Ans 4. (d) diagram D is correct because KOH is taken in small test tube

Ans 5. (b) Its aerobic respiration takes oxygen and releases carbon dioxide

Ans 6. (a) air in the flask

Ans 7. (b) Vaseline

Ans 8. (d) Cytoplasm and mitochondria

Ans 9. (a) A, B, C, D

Ans 10. (a) Two individuals of different sexes involved.

Ans 11. (d) D

Ans 12. (b) (ii), (iii), (iv), (i)

Ans 13. (b) Daughter Amoebae

Ans 14. (c) I & IV

Ans 15. (a) yeast cells do not separate after budding

Ans 16. (d) a and c

The correct observations are: i. Single cells of Amoeba and Yeast were undergoing binary fission and respectively.

Ans 17. i) c) III

ii) Figure ‘C’ shows complete individual yeast cell not budding.

Ans 18. (a) Amoeba undergoing binary fission is at a stage when nucleus is elongating, while yeast has undergone budding.

Ans 19. two precautions to be taken are:

(i) Germinating seeds (living) should be used.

(ii) The experiment set up must be air-tight.

Ans 20. (a) A fine screw is used to focus the slides of budding in yeast under high power of a microscope.

(b) Sequence showing budding in yeast:

CBSE Class 10 Study Material