We read about various organelles present in a cell. Explain what is an organelle. Name the organelles that are found in most cells. What is the function of nucleus?

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'Brick and cell are one and the same'. Explain this sentence.

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(a) A jelly-like substance is present in a cell. What is it called as? Also give its function.
(b) Give the meaning of protoplasm. Name the four elements which make up major part of protoplasm.

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A cell has A as its control centre. A contains B that plays an important role in inheritance with the help of C. The cell also contains a jelly-like substance D. D contains various cell organelles like E that is essential for obtaining energy from food. The cell is surrounded by an F that is a living component. What could A, B, D, E and F be? Also write a short note on C.

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The size of the cells of an organism has no relation with the size of its body. Do you agree? Give reason for your answer.

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The following is a brief paragraph based on cells, their structure and function, provide the missing terms and write one line about each. A biologist was looking at a cell with a ...(i)... He observed the presence of small green structures called ______(ii) __________ These structures are important as they provide the cell with __________ (iii)__________ that helps in the process of (iv) ________ The outer boundary of the cell is __________ (v) , which holds the cell together.

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What is a gene? What are its functions?

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Describe the various parts of a cell.

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Explain the functions of plastids.

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Explain the position and functions of nucleus in a cell

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