Question

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PRE TEST


Name:                                                                                       Marks:    /10

Class:

Roll no.:


Tick (√) the correct answer from the given options.



1. A cell will swell up if

(a) The concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium.

(b)  The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell.

(c) The concentration of water molecules is same in the cell and in the surrounding medium

(d) The concentration of water molecules does not matter.


2. Which of the following statement marks as a difference between plant cell and animal cell?

(a) Plant cells have cell wall which animal cells do not.

(b) Plant cells do not have vacuole while animal cells do have.

(c) Plant cells have only cell membrane while animal cells have both cell wall as well as cell membrane.

(d) Plant cells have more plastids while animal cells have few plastids.


3. You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change.

(a) Chloroplasts change to chromosplasts

(b) Chromosplasts change to chromosomes

(c) Chloroplasts change to chromosomes

(d) Chromosplasts change to chloroplasts


4. The process of plasmolysis in plant cell is defined as:

(a) Breakdown of plasma membrane in hypotonic solution.

(b) Shrinkage of cytoplasm in hypertonic medium.

(c) Shrinkage of Nucleoplasm.

(d) None of these.


5. Cell is the structural and functional unit of life. The word cell is derived from the Latin word ‘cellula’ which means “a little room”. Can you name the scientist who coined the term cell?

(a) Robert Hooke                                

(b) Anton Von Leeuwenhoek

(c) Robert Brown                                

(d) Ernst Haeckel


6. The proteins and lipids, essential for building the cell membrane, are manufactured by:

(a) Endoplasmic reticulum

(b) Golgi apparatus

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(c) Mitochondria

(d) Peroxisomes


7. A vacuole is a space or cavity within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. They are a kind of storage sacs that are very large sized in plant cell as compared to that in the animal cell.

Which among the following is not a function of the vacuole?

(a) They help to store the toxic metabolic by-products of the plant cell.

(b) They provide turgidity and rigidity to the plant cell.

(c) They help to maintain the osmotic pressure in the cell.

(d) They help the plant in its growth by the process of cell division.


8. Rahul’s mother was going to make pickle. For this she cut the vegetables into small pieces and put them in the sun for few hours. Rahul was observing all her activities very curiously and asked his mother if why she had put the salted vegetables in the sun. among the following what might be the most appropriate answer for his question?

(a) So that the pickle may get extra flavour.

(b) So that the cut vegetables may absorb the vitamin d as a nutrient from the sun rays.

(c) So that the vegetables may lose all the water by diffusion and evaporation and become dry.

(d) So that the salt may get evenly and properly absorbed by the vegetables

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Answer 1

Answer:

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Answer 2

Answer:

thanks for free points

Explanation:

ye kya h bhai