Grade 5 | Science Notes - Cell | Unit-2

a. Cell is the basic unit of life. 

a. Cells carry out vital life processes. 'T'
b. Most of the cells are large in nature. 'F'
c. The cytoplasm is only found in animal cell. 'F'
d. Vacuole is large in plant cells. 'T'
e. The cell is the basic unit of life. 'T'
f. The cell wall is found only in plant cells. 'T'
g. An ostrich egg is the biggest cell. 'T'

3. Choose the best alternative.

a. Cells are the basic unit of life. (Basic/Optional)
b. Cell wall is the outer covering in a plant cell. (Cell membrane/Cell wall)
c. Different cell organelles float in cytoplasm. (Cytoplasm/Vacuole)
d. Cytoplasm is the jelly-like fluid present in the cell. (Cytoplasm/Nucleus)
e. Vacuole stores water and mineral substances in them. (Vacuole/Nucleus)
f. Nucleus controls the major activities in the cell. (Cell membrane/Nucleus)

4. Match the following.

a. The cell is the basic unit of life.
Answer: The cell basic unit of life because it performs all the vital activities of the body.

b. An animal cell cannot perform photosynthesis.
Answer: An animal cell cannot perform photosynthesis because it does not have a chloroplast that contains chlorophyll.

6. Answer the following questions.

a. What is a cell? Why is it called the basic unit of life?
Answer: Cell is the basic, structural and functional unit of life. Cell is called the basic unit of life because it performs all the vital activities of the body.

b. What is a cell wall? Where is it found?
Answer: The outermost covering of a plant cell is called cell wall. It is found in plant cell.

c. What is the cytoplasm? What are the things found on the cytoplasm?
Answer: Cytoplasm is a thick fluid-like substance which is enclosed inside the cell membrane. The things found on the cytoplasm are Vacuole, Golgi bodies, mitochondrion, Nucleus, Ribosomes, etc.

d. Where is the nucleus found in the cell? Why is it so important?
Answer: The nucleus is found at centre in animal cell and at one side in plant cell. It is so important because it controls all the activities of the cell.

e. Write two differences between plant and animal cells.
Answer: The two differences between plant and animal cells are-

GLOSSARY:

Organelle - part of a cell. (#organelle meaning in Nepali language is कोषिका का भाग/संरचना जसको विशेष काम हुन्छ.) 
Pigment - colouring substance. (#pigment meaning in Nepali language is रंगद्रव्य, रोगन, वर्णक, पदार्थ.)
Vital - needed for life, important. (#vital meaning in Nepali language is महत्वपूर्ण.)
Enclosed - to close. (#enclosed meaning in Nepali language is बन्द छ, वरिपरि बार लगाएको/घेरिएको.)
Membrane - thin porous sheet. (#membrane meaning in Nepali language is
झिल्ली.)

Extra Important Question Answers of the Unit-2 'Cell'.

1. Why an animal cell cannot make food? 

Answer: An animal cell cannot make food because it does not have chlorophyll in it.

2. Name the largest cell as well as smallest cell in the world.
Answer: The egg of an ostrich is the largest cell in the world and the smallest cell in the world is a bacterial cell.

3. Name the largest cell as well as smallest cell in the human body.
Answer: The ovum is the largest cell in the human body and the smallest cell in the human body is the sperm.

4. Why can't we see a cell with our naked eyes?
Answer: We can't see a cell with our naked eyes because it is a microscopic. (We need a microscope to see/observe it.)

 

5. What parts of the cell can you see in the egg cell?
Answer: The parts of the cell we can see in the egg cell are golgi bodies, mitochondrion, nucleus, cytoplasm, ribosome, vacuoles, etc.

6. What happen if an animal cell consists of the chloroplast?
Answer: An animal can make it's own food and would not depend on others (i.e. vegetables, fruits, crops, meats, etc) if it consists of the chloroplast.

#From above grade class-5 science notes of "Cell" Unit-2, we hope students can define cells and cellular organelles. They can explain the different parts of a cell. Also they can differentiate plant cells and animal cells.

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