CELL

VERY SHORT QUESTION

1) Who observed the presence of cellular?
Ans. Antoni Van Leeuwenhoek.
2) Who coined the term “Cell”?
Ans. Robert Hooke.
3) Name one cell which is irregular shaped.
Ans. White blood cell.
4) Name the largest cell within the world.
Ans. Ostrich egg.
5) What is tonoplast?
Ans. Membrane protecting vacuole is called tonoplast.
6) Why is Rough Endoplasmic reticulum named so?
Ans. Rough endoplasmic reticulum consists of ribosome which synthesises protein this is why it is called so.
7) Which of the following isn’t true?
A) Living cells are made from cells.
B) The cell is the structural unit of existence.
C) The cell membrane is impermeable.
D) The cellular is the useful unit of lifestyles.
Ans. C) The cell membrane is impermeable.
8) What is the feature of Nucleus?
Ans. To Control all mobile activities.
9) What is the function of Centrosome?
Ans. Centrosome facilitates in cellular division.
FILL IN THE BLANKS
1)Chlorophyll is stored in _____.
Ans. Chloroplast.
2) Amoeba shape ____ to save meals.
Ans. Food Vacuole.
SHORT QUESTION
1) Why is the cell known as structural and useful unit of life?
Ans. All residing beings are manufactured from cells. The cellular is the smallest element that has lifestyles and might exist on its own. That is why cellular is referred to as structural and functional unit of lifestyles.
2) What are the features of cell membrane?
Ans. Cell membrane is a semipermeable membrane so it permits a few selective substances to go into into the cellular and a few selective materials to exit from the cell.
Cell membrane protects protoplasm.
3) Name the organelle which is having different shape and size in plant and animal mobile.
Ans. Vacuole is found in both plant mobile and animal cell however it large in size in plant mobile and smaller in length in animal cell.

4)  What is the difference between plant cell and animal cell in various characters?

Characters Plant cell Animal cell
i)    Cell wall        Present         Absent
ii)   Chloroplast         Present        Absent
iii)  Centrosome        Absent        Present
iv)   Vacuole       Large in size       Smaller in size

5) What is cytoplasm?
Ans. The cellular is a tiny sac containing semifluid substance. This watery fluid like substance with various salts and proteins is called cytoplasm.
6) What is the protecting of cell?
Ans. Cell is included by means of a skinny membrane called cell membrane or plasma membrane.
7) Name organelles performing power transfer.
Ans. Chloroplast to absorb power by using photosynthesis Mitochondria to release energy with the aid of respiration.
8) What is known as “Power house of the cell”? Why? Ans. Mitochondria is known as power house of the mobile because meals is broken all the way down to release strength in the mitochondria.
9) What is known as “kitchen of the cellular”? Why?
Ans. Chloroplast is referred to as kitchen of the cellular. Because photosynthesis and meals coaching are taken place within the chloroplast.
10) What is cell wall?
Ans. Plant cell has another membrane outside the cellular membrane which is called cell wall.
11) What is cell sap?
Ans. Vacuoles comprise a fluid containing water, sugar, salts, other meals substances waste substances and so forth that is known as cellular sap.
12) What is plastid?
Ans. Organelle found handiest in plant mobile containing pigment or food cloth is known as plastid.
13) What are different styles of plastid?
Ans. Plastid is assessed into three types: – a) Chloroplast; b) Chromoplast; c) Leucoplast.
14) What are the characteristics of plastid?
Ans. Plastid is a double membrane organelle. It’s form varies from round to filamentous.
15) What is protoplasm?
Ans. Living fabric inside mobile along with cytoplasm and nucleus is known as protoplasm.

LONG QUESTION / ANSWER
1) What are the functions of the mobile wall?
Ans. Cell wall performs following features: –
i) It affords definite form of the cellular.
Ii) As it’s miles freely permeable so it lets in all substances to go into and leave the cellular which allows in absorption of water from soil.
Iii) It makes the mobile rigid.
Iv) It protects the mobile from injury.
2) State various systems of a nucleus.
Ans. Nucleus has main four systems-
i) Nuclear membrane: Nucleus is enclosed via this membrane.
Ii) Nucleoplasm: Nucleus is filled by means of this semifluid substance.
Iii) Nucleolus: It is a small spherical body.
Iv) Chromatin: It is a satisfactory threadlike shape arranged in a network.

3) Differentiate between chloroplast, chromoplast leucoplast.

Ans.

Character Chloroplast Chromoplast Leucoplast
i)                   Colour Green Yellow or Red Colourless
ii)                 Function Photosynthesis Impart colour to fruit & flower Storage of food

4) What are the functions of vacuole?
Ans. Functions of vacuole are:
a) It continues the form of the mobile.
B) It maintains the stability of water in the mobile
c) It stores chemicals, food, water and salts.
D) It shops waste merchandise sometimes.
5) How do multicellular organisms grow?
Ans. The existence of better organisms starts offevolved from a unmarried cellular, called zygote, that’s formed by means of the feature of a male cellular and girl cell. The single cell divides into cells, two cells into four cells and so on. In this manner the zygote grows into an embryo, the embryo into a infant and the infant into an adult.
6) How do unicellular organisms reproduce?
Ans. In the case of unicellular organisms, the mobile comprising the body divides into to form two organisms. Each of the organism gives rise to 2 new organisms, and so on.
7) How does pores and skin mend when we get a cut.
Ans. New cells formed by using cell division continuously update lifeless and broken cells. In this way pores and skin itself heals the wound and mends while we get a cut.

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