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The Fundamental Unit of Life CBSE Class 9

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The Fundamental Unit of Life Topics

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Question 1/20

Q 1. Movement of water into cells is called

Solution

Movement of water into cells is called endosmosis. 

Q 2. The basic function of the plasma membrane is

Solution

The plasma membrane separates the cell contents from the external environment. 

Q 3. False foot in Amoeba is called

Solution

False foot in Amoeba is called pseudopodia. 

Q 4. DNA is located in the

Solution

The nucleus of the cell contains genetic information in the form of DNA. 

Q 5. That plants and animals are made of cells was discovered independently by the scientists

Solution

That plants and animals are made of cells was discovered independently by the scientists Matthias Schleiden and Theodor Schwann, respectively. 

Q 6. Which of the following is not a part of the prokaryotic cell structure?

Solution

Prokaryotic cells do not have a nuclear membrane.

Q 7. Eukaryotic cells are usually ___________ in size.

Solution

Eukaryotic cells are usually 5100 m in size. 

Q 8. Which of the following is not a basic component of a cell? 

Solution

The vacuole is not a basic component of a cell. A cell may or may not have a vacuole. 

Q 9. ___________ are cytoplasmic projections which help the prokaryotic cell to transfer its DNA to another prokaryotic cell.

Solution

Pilli are cytoplasmic projections which help the prokaryotic cell to transfer its DNA to another prokaryotic cell. 

Q 10. Which of the following cells is not matched correctly to its shape?

Solution

Ovum is spherical in shape. 

Q 11. The _______ was the first cell organelle to be discovered by scientists.

Solution

The nucleus was the first cell organelle to be discovered by scientists. 

Q 12. A honeycomb-like structure was observed from a cork section by the English scientist

Solution

The English scientist Robert Hooke observed a honeycomb-like structure from a cork section. 

Q 13. Which of the following is not a characteristic of a prokaryotic cell?

Solution

Prokaryotic cells possess genetic material in the form of a single chromosome suspended in the cell cytoplasm. 

Q 14. ________ are non-membrane bound organelles present in all prokaryotic cells.

Solution

Ribosomes are non-membrane bound organelles present in all prokaryotic cells. 

Q 15. __________ is the single largest cell known to mankind.

Solution

Ostrich egg is the single largest cell known to mankind. 

Q 16. Which of the following functions is performed by the cristae of the mitochondrion?

Solution

Cristae of the mitochondrion increase the surface area for chemical reactions which take place during cellular respiration. 

Q 17. In a/an ____________ solution, the concentration of water is less in the surrounding medium than in the cell.

Solution

In a hypertonic solution, the concentration of water is less in the surrounding medium than in the cell. 

Q 18. A mitochondrion is bounded by _______ membranes.

Solution

A mitochondrion is a double membrane cell organelle. 

Q 19. ________ contains the genetic material of a cell.

Solution

The nucleus contains the genetic material and acts as a control centre of the cell.

Q 20. The proteins synthesised by the ER reach the plasma membrane with the help of

Solution

The Golgi apparatus transports the proteins synthesised by the ER to the plasma membrane. 

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