Life Science, class 10 West Bengal Board, English Medium, 1st Summative test. April 2023.
Set-2
Long question practice paper 5 marks Time: 60mins.
1.Draw the morphology of an ideal eukaryotic Chromosome and label the following (a) Secondary Constriction ( b) Centromere (c) Satellite (d) Telomere
2. Why mitosis called equational cell division. Mention the characteris features of anaphase of mitotic cell division.
3. Draw a neat diagram of the vertical section of the eyeball of human eye and label the following parts (a) Conjunctiva (b) Iris (c) Yellow spot (d) Optic nerve.
4. Draw the morphology of an ideal eukaryotic chromosome and label the following parts: (a) Chromatid (b) Centromere (c) Nucleolarorganizer (d) Telomere.
5. What is reflex action? Classify reflex action with example.
6. What is synapse ? What are the different types of synapse according to the formation? Mention an important functions of synapse.
7. Differentiate between the process of cytokinesis in plant cell and animal cell. Write any two significance of meiosis cell division.
8. Draw a diagram of a reflex Are and lebel the following parts-(a) Receptor (b) Sensory nerve (c) Effector (d) Motor nerve,
9. What types of chemical component are synthesized in a cell cycle? "In case of prophase and telophase changes of opposite nature hapens - write two such changes.
10. Distinguish between Euchromatin and Heterochromation on the basis of following points • Staining property • Activity.
11. Write two feature of metaphase of mitosis of a plant cell division and three features of anaphase of animal cell division.
12. What types of chemical components are synthesized in different stages of interphase. In a cell cycle state the significance of G° stage.
13. Write a short note on bipedal locomotion of human. which organ maintains balance during locomotion in human ?
14. what is accommodation ? How a person accommodate himself to a near or distant object?
15. Why meiosis called reductional division? write the significance of meiosis.
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