Biology Work Sheet Marks -13 1. Can you name the two organelles we have studied that contain their own genetic material?(1) 2.Why is the plasma membrane called a selective permeable membrane?(2) 3.What is osmosis?(2) 4.Which organelle is known as the powerhouse of of the cell?why?(3) 5.Make a comparison and write down ways on which plant cells are different from animal cells.(5)
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Answers
Explanation:
Can you name the two organelles we have studied that contain their own genetic material? (page-65)
Answer- Mitochondria and plastids their own genetic material
2. If the organization of a cell is destroyed due to some physical or chemical influence, what will happen? (page 65)
Answer- If the organization of a cell is destroyed due to some physical or chemical influence then cell will not be able to perform its basic functions like digestion, excretion, respiration etc. This may stop all the life activities and the life of an individual may come to an end.
3. Why are lysosomes known as suicide bags? (page 65)
Answer- Lysosomes are called suicide bags because in case of any disturbance of their cellular metabolism they release their own enzymes to digest their own cell.
4. Where are proteins synthesized inside the cell? (page 65)
Answer- The proteins are synthesized in the Ribosome
EXERCISE (page 66)
1. Make a comparison and write down ways in which plant cells are different from animal cells.
Answer
Animal cell Plant cell
Has a cell wall. Has cell wall made up of cellulose.
It does not contain chloroplast. It contains chloroplast.
It has centrosome. It does not has centrosome.
Vacuoles are smaller in size. Vacuoles are larger in size.
Lysosomes are larger in number. Lysosomes are absent or very few in number
Prominent Golgi bodies are present. Subunits of Golgi bodies are present.
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