AP Class 10 Model Paper 2021 Biological Science Set 1

MODEL PAPER 1
GENERAL SCIENCES – PAPER II
Time : 2 hrs 45 min Max marks: 50

Instructions:

1. First 15 minutes are meant for reading the question paper, and remaining
2:30 minutes are for writing the exam.
2. Answer all questions in the booklet given.
3. The question paper contains four sections.
4. Only section four has internal choice.

SECTION – I 12X ½= 6 MARKS

Note: Answer all the questions. Each question carries ½ marks.

1. Write the missing part from the flow chart.

Nostrils -> nasal cavities-> pharynx-> larynx -> _______ -> bronchi -> bronchioles ->
alveoli.

2. Water : xylem :: _______: phloem

3. Expand RUBP.

4. Group A: - insulin, testosterone

Group B: - pepsin, trypsin.

Identify the group with enzymes.

5. Pollen grains responds to sugary substance on stigma. What do you call call this type of
response?

6.

Write the name of the logo.

7. find the wrongly matched.

a) prophase - equatorial plate

b) anaphase - chromosomes split into two

c) meiosis - reduction division

8. Give an example for vestigial organs in humans.

9. The term NICHE denotes not only the animal’s position in the food web and what it eats,
but not its mode of life.

Rewrite the sentence by making necessary correction.

10. I am a type of resource and I can be replaced after being used. Who am I?

11 and 12. Complete the paragraph.

_____________ (11) continue up to 30 – 45 minutes. Increase in _______ (12) levels result in
sensation of hunger and motivation to consume food.

SECTION – II 8X 1= 8 MARKS

Note: Answer all the questions. Each question carries 1 mark.

13. Avinash is afraid of entry of food into respiratory passage. Inorder to convince him
which organ you will refer to from respiratory system?

14. Jeevan said that oxygen is the waste product produced during light reactions. Then what
are the useful products produced during light reactions?

15. Prepare any two questions to ask about fuel consumption from petrol vendor.

16.

What does the experiment indicate?

17.

How do concentration and pH of urine is maintained?

18.

What is expressed in f1 generation when a monohybrid cross is made using purelines of
these two traits?

19.

identify and write the name of the diagram.

20. Write two slogans on importance of vaccination.

SECTION – III 8X 2= 16 MARKS

Note: Answer all the questions. Each question carries 2 marks.

21. Write a note on the process of layering.

22. What is fluorosis? What are its symptoms?

23. Ravi wanted to know about dialysis. Help him to prepare a set of questions to ask the
Urologist. Write the questions.

24. Suma told her friend to take milk, eggs, green leafy vegetables regularly, other wise you
will be in deficient of riboflavin. What happens if there is the deficiency of riboflavin in
our body?

25. What precautions you follow to perform this
experiment?

26. Read the following and answer the questions given below:

Lymph is the vital link between blood and tissues by which essential substances pass
from blood to cells and excretory products from cells to blood. The lymphatic system is a
parallel system to venous system which collects tissue fluid from tissues and transports
it to the venous system.

a) What is the function of lymphatic system?
b) To which system lymphatic system acts as a parallel system?

27. Continuous usage of neck leads to its elongation in giraffe. Write any two examples from
your surroundings to support the statement.

28. How do you appreciate the feedback mechanism to regulate the level of hormones in the
body?

SECTION – IV 5X 4= 20 MARKS

Note: Answer all the questions. Each question carries 4 marks.

29. What is coagulation of blood? Describe the process of coagulation of blood.

OR

Explain the flow of energy in an ecosystem using pyramid of energy.

30. Write the differences between inspiration and expiration.

OR

Natural resources should be managed. Write a detailed note on their management.

31. a)What is the apparatus used to prove that carbon di oxide is essential for
photosynthesis?

b) Write the procedure of the experiment.

OR

What is the procedure you followed to demonstrate the role of mucus in protecting the
stomach from its own acids? What did you observe?

32. From the given table of plant hormones, answer the following:

a) What are the hormones that effect seed dormancy?
b) What are the hormones that help in opening and closing of stomata?
c) Which hormones help in differentiation of shoots and roots?
d) What is the function of ethylene?

OR

List out the homologous and analogous organs from the following:

Swimmer of whale, using of bat, leg of cheetah, wing of butterfly, wing of bird, hand of
man, claw of mole.

33. Draw a neat and well labeled diagram of nephron. Name the part in which ultrafiltration
takes place.

OR

Label the parts A B C D E F in female reproductive system. Name the part in which
fertilization takes place