❤ BIOLOGY TXT BOOK EX - FOR THE CELL

Page 39: Multiple Choice Questions

1. The lowest level of organisation in a multicellular organism is:

   • (d) cell

2. The Cell was discovered by:

   • (c) Robert Hooke

3. Which of the following is not a unicellular organism?

   • (b) Human

4. The membrane that separates nucleus from cytoplasm is called:

• (b) nuclear membrane

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Page 40: Objective Questions

I. Multiple Choice (Continued)

5. A typical plant cell has a: (d) All of these (Nucleus, Cell wall, Chloroplast)

6. The cell is surrounded by a membrane called: (b) Cell membrane

7. Organelles are present in: (a) Cytoplasm

8. A cell organelle commonly called 'suicide bag' is: (b) Lysosome

II. Fill in the blanks

1. The Nucleus is the control centre of the cell.

2. The instrument used to see tiny objects is called a Microscope.

3. Chloroplast contain green coloured pigment in plant cell.

4. The outer lining layer of cell is Cell membrane.

5. Energy is produced in Mitochondria.

6. The term cell was given by Robert Hooke.

7. Cell wall is present in Plant cells.

III. True (T) or False (F)

1. Most cells have only one nucleus. [ T ]

2. Only the nucleus of a cell represents the protoplasm. [ F ] (Protoplasm includes cytoplasm and nucleus)

3. The cells of Hydrilla leaf contain chloroplast. [ T ]

4. All living organisms are made of cells. [ T ]

5. Nucleus is the brain of cell. [ T ]

6. Every cell has cytoplasm. [ T ]

7. All cells in a multicellular organism can live independently. [ F ]

8. The outermost covering in an animal cell is cell wall. [ F ] (It is the cell membrane)

IV. Match the following

1. Cell — (c) Unit of living body

2. Nucleus — (d) Boss of the cell

3. Cell wall — (a) Plants

4. Chloroplast — (e) Contains green pigment

5. Cytoplasm — (f) Jelly-like substance...

6. Organelles — (b) Tiny structures inside cells

VI. Unscramble the words

1. NUCLEUS

2. MEMBRANE

3. CYTOPLASM

4. PROTOPLASM

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Page 41: Case Study & Assertions

VII. Find the odd one out

1. Cell division (The others are physical parts of a cell).

2. Mitochondria (It is a double-membrane organelle, while the others are parts of the nucleus).

3. Centrosome (Found only in animal cells; the others are related to plant cells).

4. 
   

IX. Case Study Based Questions

1. Which one shows a difference...?

• (a) The nucleus is without membrane in P while it is membrane bound in Q. (P is a prokaryotic-like bacterial cell, Q is a eukaryotic animal cell).

1. Cell P cannot be observed in:

   • (d) Insects (Insects are multicellular eukaryotes).

2. Identify a characteristic feature of cell Q:

   • (c) It has many small membrane-bound structures containing genetic material (Nucleus).

3. The organelle which is absent in P is:

• (c) nuclear membrane

X. Assertion-Reason Type

1. Assertion (A): Inner membrane of mitochondria is highly folded. Reason (R): Increases surface area...

   • (a) Both (A) and (R) are correct and (R) is the correct explanation.

2. Assertion (A): Ribosomes are located on chromosomes. Reason (R): Cell membrane surrounds the cell.

• (d) (A) is false but (R) is true. (Ribosomes are in cytoplasm/ER; chromosomes are in nucleus).

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Page 42: Crossword & Practical

XI. Crossword Puzzle

Across: 5. UNICELLULAR 6. CELL WALL 7. CHLOROPLAST 8. MYCOPLASMA

Down:

1. AMOEBA

2. NUCLEUS

3. ORGANELLES

4. MITOCHONDRIA