Get important one-liner questions and answers from Chapter 5 – The Fundamental Unit of Life for CBSE Class 9 Science. Quick revision notes to boost your exam preparation. Easy and accurate!
Q1. Who discovered cells for the first time?
Ans. Robert Hooke discovered cells for the first time in 1665.
Q2. What instrument did Robert Hooke use to observe cells?
Ans. Robert Hooke used a self-designed microscope.
Q3. What is the fundamental unit of life?
Ans. The cell is the fundamental unit of life.
Q4. Which substance forms the outer boundary of the cell?
Ans. The cell membrane (plasma membrane) forms the outer boundary.
Q5. What is the function of the plasma membrane?
Ans. The plasma membrane controls the movement of substances in and out of the cell.
Q6. Which process involves the movement of water through a semi-permeable membrane?
Ans. Osmosis involves the movement of water.
Q7. What is diffusion?
Ans. Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration.
Q8. What is the jelly-like substance inside the cell called?
Ans. The jelly-like substance is called cytoplasm.
Q9. Which cell organelle controls all the activities of a cell?
Ans. The nucleus controls all the activities of a cell.
Q10. What are the thread-like structures present inside the nucleus called?
Ans. Chromosomes are the thread-like structures inside the nucleus.
Q11. What is the genetic material present in chromosomes?
Ans. DNA is the genetic material present in chromosomes.
Q12. What is the function of the endoplasmic reticulum?
Ans. The endoplasmic reticulum helps in the transport of materials inside the cell.
Q13. What are the two types of endoplasmic reticulum?
Ans. Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).
Q14. What is the main function of the Rough Endoplasmic Reticulum?
Ans. Rough Endoplasmic Reticulum helps in protein synthesis.
Q15. What is the main function of the Smooth Endoplasmic Reticulum?
Ans. Smooth Endoplasmic Reticulum helps in lipid synthesis.
Q16. What is the function of the Golgi apparatus?
Ans. The Golgi apparatus modifies, sorts, and packages materials for transport.
Q17. What are lysosomes known as?
Ans. Lysosomes are known as the suicide bags of the cell.
Q18. Which organelle is known as the powerhouse of the cell?
Ans. Mitochondria are known as the powerhouse of the cell.
Q19. What energy molecule is produced by mitochondria?
Ans. Mitochondria produce ATP (Adenosine Triphosphate).
Q20. What is the function of plastids in plant cells?
Ans. Plastids help in photosynthesis, storage, and pigment synthesis.
Q21. Name the green pigment present in chloroplasts.
Ans. Chlorophyll is the green pigment present in chloroplasts.
Q22. Which plastids store starch, oils, and proteins?
Ans. Leucoplasts store starch, oils, and proteins.
Q23. What are the small structures inside the cytoplasm called?
Ans. Organelles are small structures inside the cytoplasm.
Q24. What is the cell wall made of?
Ans. The cell wall is made of cellulose.
Q25. What is the function of the cell wall?
Ans. The cell wall provides structural support and protection.
Q26. What is the fluid-filled space inside the plant cell called?
Ans. The fluid-filled space is called the vacuole.
Q27. What is the function of vacuoles in plant cells?
Ans. Vacuoles store nutrients, waste products, and help maintain turgor pressure.
Q28. What is the function of ribosomes?
Ans. Ribosomes help in protein synthesis.
Q29. Where are ribosomes found in the cell?
Ans. Ribosomes are found either free in the cytoplasm or attached to the endoplasmic reticulum.
Q30. What is protoplasm?
Ans. Protoplasm is the living content of the cell, including cytoplasm and nucleus.
- Class 9 Science Chapter 5 One Liner
- The Fundamental Unit of Life Questions
- Class 9 Science Important Questions
- One Liner Science Questions Class 9
- CBSE Class 9 Chapter 5 Notes
One-Liner Questions and Answers – Chapter 5