26.) is the plant cell wall living or dead?
() is the cell wall in a plant cell permeable or selectively permeable?
What is its chemical composition?
27. Name any two cell organelles which are bounded by double membranes.
8. Why are mitochondria and plastids called semi-autonomous organelles?
9. Name the cell organelle which is commonly called "suicidal bags” of the cell
ise?
10. Why does the plant cell placed in hypotonic solution, not burst?
Answers
26) cell wall is dead due to the presence of cellulose,Cell Walls (in plants, fungi and prokaryotic cells) are permeable, the cell wall is made up of cellulose, hemicellulose, pectin and protein.
27)Mitochondria and chloroplasts are the two organelles that are double-membrane-bound.
28)They have their own genetic material and are said to be 'semi-autonomous organelles' Chloroplast and mitochondria are called semi-autonomous organelles because they have their own genetic material (DNA) and are capable of synthesizing proteins required for their functioning.
29)Lysosomes are called suicidal bags because when the cells damage, they burst and digest their own cell.
30)If the plant cell is placed in the hypotonic solution, there is no possibility for busting. It is because the plant cells are properly enclosed by a strong cell wall. When the plant cell is placed in the hypotonic solution, it takes up more water by osmosis and begins to swell, but cell walls avoid cell from bursting.