Question

Tick[√] the correct answer:
3. The nucleus:
a. controls all the cell activities
b. controls only part of the cell
c. does not have any activity
4. Organelles are:
a. small living organisms found outside the cell
b. organs found in the body
c. small structures found scattered in the cytoplasm
5. Which of the following is present only in animal cells?
a. cell wall
b. centrosome
c. ribosomes​

Answer 1

Answer:

3. a

4.c

5.b

this is the answer for ur question

Answer 2

★ Required Answer ★

Tick[√] the correct answer:

3. The nucleus

• a. controls all the cell activities ☑
• b. controls only part of the cell
• c. does not have any activity

Justification:

First of all ,option C will be incorrect at the spot because we know that every cell organelle have any function so it will also have any function.

Now in both a and b options only first one is suitable option as nucleus is main part of the cell. Thus, option (a) is correct. ☑

4. Organelles are:

• a. small living organisms found outside the cell
• b. organs found in the body
• c. small structures found scattered in the cytoplasm ☑

Justification:

We know that organelles are found inside the cell so first option will be incorrect as according to first option is is saying that organelles are found outside the cell. Last option is correct as they are small structures found scattered in the cytoplasm. Thus, option (c) is correct. ☑

5. Which of the following is present only in animal cells?

• a. cell wall
• b. centrosome ☑
• c. ribosomes

Justification:

We know that cell wall is not present in animal cells. They are only present in plant cells as they protect the plant cells from the variation in wind,temperature, humidity and so on ,so option first is incorrect. Ribosomes are found in both types of cells i.e animal cells and plant cells. Thus, it is also incorrect loption remained is centrosome so it will be correct. ☑

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Explore More in CelluLar BioloGy!

${\boxed {\huge {\bf {\pink { Nucleus }}}}}$

• It is a dense body found in the centre of the cell.

• It controls all the activities of the cell.

• It is made up of parts : Nuclear membrane, Nucleoplasm, Nucleolus, Chromatin materials.

• It is a double membrane bounded cell organelle.

${\boxed {\huge {\bf {\pink { Cell~Organelles }}}}}$

• They are different structures found in the cytoplasm of the cell.

• Various cell organelles are:

• Mitochondria : Production of energy takes please share this is why it is called "powerhouse of the cell".

• Endoplasmic Reticulum : It is of two types of, rough endoplasmic reticulum synthesis of proteins and smooth endoplasmic reticulum synthesis lipids,fat and cholesterol.

• Golgi bodies : They are used for the packaging of the food in the cell.

• Lysosome : They are called "suicidal bags" as sometimes they may brust and destroy dead cell. areIt contains digestive juices.

• Plastids : They are colourful structures that give colourful pigment to the cell. they are of 3 types chloroplast ,chromoplast and leucoplast.

• Vacuole: They are fluid-filled or solid-filled membrane bounded sacs. It helps to maintain osmotic pressure in the cell.

• Ribosomes : They are tiny granule like structures found on the surface of the rough endoplasmic reticulum.

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