Question

ONE MARK QUESTIONS 1. Name the cell without membrane bound nucleus. 2. What are membrane bound structures in a cell called? 3. Name the functional segment of DNA that carries genetic information. 4. Where are proteins synthesized inside the cell? 5. Mitochondria is called the power house of the cell. Give reason. TWO MARKS QUESTIONS 6. What is Chromatin material and how does it change just before the cell division? 7. Nucleus is called the director of the cell. Justify the statement giving reasons. 8. Give four differences between prokaryotic and eukaryotic cells. 9. State the types and functions of endoplasmic reticulum. 10. What would happen to the life of a cell in the absence of golgi apparatus? THREE MARKS QUESTIONS 11. Why is plasma membrane called selectively permeable membrane? How do substances like CO2and water move in and out of the cell? 12. Explain hypotonic, isotonic and hypertonic solution. 13. Photoautotrophic bacteria lack chloroplast. Name the part of the bacterial cell which performs photosynthesis? Plants have large sized vacuole. Why? 14. Why are lysosomes known as scavengers of the cells? Give two functions of centrosome. 15. Give three similarities and one difference between mitochondria and plastid. Expand ATP. FIVE MARKS QUESTIONS 16. You took a fresh tomato and put it in a highly concentrated salt solution for 2 hrs. Your little brother looked at it and stated “The fat tomato is so thin now” What a magic? Define the phenomenon which has takenplace. How does a cell wall help a plant to withstand hypotonic external mediawithout bursting? 17. Draw the diagram of an animal cell as seen through an electron microscope. Label the parts that carry out the functions: -Respiration, Secretion, Protein synthesis, Transport of material. Write the contribution of a) Robert Hooke, b) Leeuwenhoek c) Robert Brown. 18. A cell is called the structural and functional unit of life. Explain. What is the meaning of division of labour? Is it different from cell to cell? 19. Draw the nucleus of a cell and label the: a) Double layered structure which encloses the nucleus. b) Visible entangled mass of thread like structures. c) A darkly stained round structure inside the nucleus. Name the two components of Chromosomes. Mention the role of nuclearpore. What does DNA moleculecontain? Give one difference between cytoplasm andnucleoplasm. no spam spammers will be reported only write answers

class 9 ​

Answer 1

Please refer the attachment for the answer.

Hope it helps.

Answer 2

Explanation:

meet.google.com/ojj-uxwv-uki

join it