Question

1.Which organelle is known as the powerhouse of the cell! Why.
2.Where do the lipids and proteins constituting the cell membrane get synthesised?
3. How does an Amoeba obtain its food?
8. What is osmosis?

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Answer 1

1 Mitochondria is called the powerhouse of cell. They are so called because they carry out the process of aerobic respiration and generate the energy molecules (ATP or adenosine Triphosphate) for cell operation.

2 Lipids and proteins constituting the cell membrane are synthesized in the endoplasmic reticulum. SER (Smooth endoplasmic reticulum) helps in the manufacturing of lipids. RER (Rough endoplasmic reticulum) has particles attached to its surface, called ribosomes

3.Amoeba obtains its food by the process of endocytosis. ... It engulfs the food particle with the help of pseudopodia and then forms a vacuole around it.

4 process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

Answer 2

1.Mitochondria is known as powerhouse of the cell bcoz it provides energy in the form of ATP molecules.

2.Smooth endoplasmic reticulum helps in the manufacture of lipids and rough endoplasmic reticulum are helps in constituting the proteins.

3. Amoeba obtain it's food by changing the shapes by pseudopodia by the process endocytosis.

8. the passage of water from a region of high to less concentration through a selectively permeable membrane is known as osmosis.