Question

Do this.

Send me correct answer only.
otherwise answer will be reported.

Don't give unnecessary word.​

Answer 1

Answer:

mitochondria is known as the powerhouse of the cell because it produces ATP for the cell which gives it an energyy. ATP means adenosine triphosphate

two basic differences between plant cell and animal cell is that plant cells have a cell walland animal cell doesn't have a cell wall.

animal cell has a centrosome and centrioles whereas plant cell does no

t red blood cells are biconcave and dislike she because their biconcave shape because to increase the surface area of for absorption of oxygen

what is protoplasm protoplasm is the living matter present inside the cell what is cell wall composed of cell wall is composed of cellulose

Answer 2

Questions

1. (i) Name three different types of plastids present in plants and mention their function.

(ii) Explain why mitochondria is known as 'power house of the cell'?

(iii) Mention two basic differences between plant cells and animal cells.

2. (i) Explain why Red blood cells are bi-concave and disc-like in shape?

(ii) What is protoplasm?

(iii) What is cell wall composed of?

____________________________

Answers

1. (i) Plastids are present in plants and algae. We have three types of plastids, they are →

• Chloroplast ⇒ They have chlorophyll present in them which is a green pigment that is essential for photosynthesis in plants.
• Chromoplast ⇒ They are coloured plastids and give colour to fruits and flowers. Example of chromoplast → Xanthophyll gives yellow colour, Lycopene gives red colour, etc.
• Lecoplast ⇒ They are white, transparent and colourless plastids. They store starch, protein and fats (lipids). Its main function is to store food molecules.

____________________________

(ii) Mitochondria is also known as the power house of the cell since it is responsible for extracting and releasing energy from food in the form of ATP (Adenosine Tri Phosphate). ATP is the energy currency of cell and is released by cellular respiration that occurs in mitochondria.

____________________________

(iii) Here are the difference between plant and animal cells ⇒

Plant Cells

• It consists of plastids, cell wall and large sap vacuole that is absent in animal cells.
• Nucleus is present in the corner.

Animal Cells

• It consists of lysosomes and centrosomes that are absent in animal cells. Animal cells don't have a large vacuole, they might have small vacuoles present.
• Nucleus is present in the centre.

____________________________

2. (i) RBCs have a bi-concave and disc-like structure that helps them to bend and move smoothly through the narrowest capillaries present in our body. These cells lack of a nucleus. The gas exchange takes place in the capillaries.

____________________________

(ii) Protoplasm is known as the living part of the cell. It consists of the nucleus and cytoplasm bounded by the cell membrane. They are the basic component that is the physical basis of a living cell. Most of the biochemical reactions (metabolism) occurs in the protoplasm. In 1839, Purkinje had termed the name "Protoplasm"

____________________________

(iii) Cell walls in plants are composed of cellulose and hemicellulose. Cell walls in fungi are composed of chitin and cell walls in bacteria are composed of peptidoglycan. They are fully/freely permeable and allows the entry and exit of all materials. It is the outermost layer of cells and is the dead part of the cell. It gives mechanical support and it gives a particular shape and structure to the living cell.

____________________________