Question

Draw the diagram of prokaryotic cell and label the following nucleoid, ribosomes.

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Periodic Test 1

2021-22

Grade: IX Maximum Marks: 80

Subject: Science Time Allowed: 3 Hours

General instructions:

 This paper has 8 pages.

 The question paper comprises four sections A, B, C and D. There are 36 questions in the

question paper. All questions are compulsory.

 Section–A - question no. 1 to 20 - all questions and parts thereof are of one mark each. These

questions contain multiple choice questions (MCQs), very short answer questions and assertion

- reason type questions. Answers to these should be given in one word or one sentence.

 Section–B - question no. 21 to 26 are short answer type questions, carrying 2 marks each.

Answers to these questions should in the range of 30 to 50 words.

 Section–C - question no. 27 to 33 are short answer type questions, carrying 3 marks each.

Answers to these questions should in the range of 50 to 80 words.

 Section–D – question no. - 34 to 36 are long answer type questions carrying 5 marks each.

Answer to these questions should be in the range of 80 to 120 words.

 There is no overall choice. However, internal choices have been provided in some questions. A

student has to attempt only one of the alternatives in such questions.

 Wherever necessary, neat and properly labelled diagrams should be drawn.

Section A

1. Which organelle is known as the powerhouse of the cell? Why? 1

OR

What would happen to the life of a cell if there was no Golgi apparatus?

2. Define evaporation. 1

3. Give an example of a uniformly accelerated motion. 1

4. Two balls of different masses are thrown vertically upwards with the same velocity.

Which one of them will reach a higher altitude?

1

5. Draw a diagram of a prokaryotic cell and label the nucleoid. 1

6. Draw a diagrammatic representation of distance-time graph that you will get for uniform

speed.

1

OR

What is the technical term used for the rate of motion of a body?

7. If the mass of a body and force acting on it are both doubled, what happens to its

acceleration?

1

2

8. Name any two materials stored in leucoplasts. 1

9. How many pairs of chromosomes are present in humans? 1

OR

Mention any two structures that are found only in plant cells not in animal cells.

10. Name the force that keeps the object moving in a circular path with constant speed. 1

11. Name any two cattle breeds which show excellent resistance to diseases. 1

OR

What has white revolution led to?

12. Why are prawns and oysters cultivated? 1