Science - Class 9

Q1. Where are proteins synthesized inside the cell? 

 

Q2. Name any cell organelle which is non-membranous.

 

Q3. What is the primary function of leucoplasts?

 

Q4. Name some single celled organisms.

 

Q5. Where do the lipids and proteins constituting the cell membrane get synthesised? 

 

Q6. Can you name the two organelles we have studied that contain their own genetic material?

 

Q7. Chromosomes are made up of

(a) DNA

(b) protein

(c) DNA and protein

(d) RNA.

 

Q8. Kitchen of the cell is

(a) mitochondria

(b) endoplasmic reticulum

(c) chloroplast

(d) Golgi apparatus.

 

Q9. Silver nitrate solution is used to study

(a) endoplasmic reticulum

(b) Golgi apparatus

(c) nucleus

(d) mitochondria.

 

Q10. 1 µm is

(a) 10^-6m

(b) 10^-9m

(c) 10^-10m

(d) 10^-3m

 

Q11. Name the two organelles in a plant cell that contain their own genetic material and ribosomes.

 

Q12. Which of the following are covered by a single membrane?

(a) Mitochondria

(b) Vacuole

(c) Lysosome

(d) Plastid

 

Q13. Bacteria do not have chloroplast, but some bacteria are photoautotrophic in nature and perform photosynthesis. Which part of bacterial cell performs this?

 

Q14. If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

 

Q15. Lysosome arises from

(a) endoplasmic reticulum ,

(b) Golgi apparatus

(c) nucleus

(d) mitochondria.

 

Q16. What is osmosis? 

 

Q17. Organelle other than nucleus, containing DNA is

(a) endoplasmic reticulum

(b) Golgi apparatus

(c) mitochondria

(d) lysosome.

 

Q18. Which kind of plastid is more common in

(a) roots of the plant

(b) leaves of the plant

(c) flowers and fruits. 

 

Q19. A cell will swell up if

(a) the concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium

(b) the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell

(c) the concentration of water molecules is same in the cell and in the surrounding medium

(d) concentration of water molecules does not matter

 

Q20. Why are lysosomes known as suicide bags?

 

Q21. Cell arises from pre-existing cell was stated by

(a) Haeckel

(b) Virchow

(c) Hooke

(d) Schleiden.

 

Q22. Living cells were discovered by

(a) Robert Hooke

(b) Purkinje

(c) Leeuwenhoek

(d) Robert Brown.

 

Q23. Which of these is not related to endoplasmic reticulum?

(a) It behaves as transport channel for proteins between nucleus and cytoplasm.

(b) It transports materials between various regions in cytoplasm.

(c) It can be the site of energy generation.

(d) It can be the site for some biochemical activities of the cell.

 

Q24. Write the name of different plant parts in which chromoplast, chloroplast and leucoplast are present.