A practice paper for 9th ICSE students of Biology.

1. BIOLOGY
SCIENCE Paper – 3
(Two hours)
Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the Question Paper.
The time given at the head of this Paper is the time allowed for writing the answers.
Attempt all questions from Section I and any four questions from Section II.
The intended marks for questions or parts of questions are given in brackets [ ].
SECTION I (40 Marks)
Attempt all questions from this Section
Question 1
a. Name the following:
5
i. Animals with backbone
ii. Mineral element needed for strong teeth
iii. Enzyme which digests starch in mouth
iv. The vaccine that helps to produce immunity against Polio
v. Contractile phase of heart
b. State whether the following statements are true or false. If false, rewrite the
correct form of the statement:
5
i. Blood fails to clot readily in the case of absence of calcium
ii. Mothers antibodies can reach the baby through placenta.
iii. Muscles are attached to bones by ligaments
iv. Intestinal villi have a lymph vessel called lacteal
v. Sugars are insoluble in cold water.
c. Give technical terms for the following:
5
i. The first cervical vertebra
ii. Rod- like structure present at the mid-dorsal axis of the body
iii. Four front teeth in the centre of the jaw
iv. Long Flat bone lying in the middle of the front part of the chest
v. Chemicals found in the blood which acts against germs or their
secretions.
d. Choose the odd one out of the following terms given and name the category
to which the others belong:
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i. Formalin, iodine, Lysol, phenol
ii. Neutrophils, monocytes, basophils, eosinophils
iii. Snails, snakes, slugs, squids.

2. iv. Maltase, lactase, invertase, amylopsin
v. Humerus, fibia, radius, ulna
e. Choose the correct alternative from the choices given below each statement
so as to complete its meaning:
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i. Your external ear is supported by:
1. Bone
2. Cartilage
3. Tendon
4. Ligament
ii. White blood cells engulf bacteria in a process called:
1. Diapedesis
2. Phagocytosis
3. Active transport
4. Passive transport
iii. Red Cross day is celebrated on:
1. May 8
2. June 23
3. September 17
4. November 21
iv. T in DTP vaccination stands for:
1. Tuberculosis
2. Tetanus
3. Typhoid
4. Tonsilitis
v. Pylorus is an opening from:
1. Oesophagus into stomach
2. Mouth cavity into oesophagus
3. Stomach into intestine
4. Intestine into rectum
f. Explain the following terms:
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i. Malnutrition
ii. Digestion
iii. Antagonistic muscles
iv. Vaccination
v. Antibiotic
g. Write the full form of: 5
i. AIDS
ii.WHO
iii. Kcal
iv. BCG
v.DTP

3. h. Match the column 5
Column A Column B
1. Aquatic mammal a. Grinding
2. Penicillin b. Pellagra
3. molars, premolars c. Antibiotics
4. Anaemia d. Dolphin
5.Vitamin B3 e. Iron
SECTION II (40 Marks)
Attempt any four questions from this Section
Question 2
a. Name the phylum of the below:
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I. Sycon
II. Earthworms
III. cray fish
IV. sea-urchin
V. mussels
b. Differentiate between the following pairs on the basis in 1 point:
5
I. Antiseptic and Antibiotics
II. Plants and animals
III. Basophils and eosinophils
IV. Kwashiorkor and Marasmus
V. True rib and floating rib
Question 3
a. Give any 2 sources for 5
I. Carbohydrates
II. Proteins
III. Fats
IV. Calcium
V. Retinol
b. The diagram below shows the internal structure of a villus.
5
I. Label the parts 1, 2, 4.
II. Give the functions of part marked 1.
III. What type of blood flows through arteries ?
IV. Name the glands present at the juction of two villi.

4. Question 4
a.
I. Mention two ways in which the ileum of a mammal is adapted for the absorption of
digested food. 3
II. Name the regions of vertebral column. 2
(b) Categorise the following items into carbohydrates and proteins: 5
Cellulose, Starch, Egg Albumin, Milk, Glycogen, Legumes, Pea, Cane-sugar, Rice,
meat
Question 5
a. Given below is a diagrammatic representation of a certain part of the process
of circulation of blood in man. Study the same and then answer the questions
that follow: 5
I. Name the parts labelled 1, 2, 4 and 6.
II. Give the number and name of the vessel which contains the maximum

5. amount of urea a few hours after a protein rich meal.
III. Draw a neat, labelled diagram of the cross sectional view of the blood
vessel numbered 3.
IV. Mention two structural differences between blood vessels ‘3’ and ‘8’.
b. The principle of vaccination is to produce immunity against a disease.
Explain.
5
Question 5
a. Write a short note on main activities of WHO 5
b. State any five functions of blood 5
Question 6
a. What are different types of joints? Give one example of each. 5
b. List the six main purposes for which food is required by the body. 5
Question 7
a. Take 4 test tubes and mark them A,B,C and D. Take a small quantity of
the protein suspension in each tube. Now add a few drops of 1% solution
of pepsin and hydrochloric acid as follows:
Test-tube A—only pepsin
Test-tube B—only HCl
Test-tube C—Pepsin + HCl
Test-tube D—HCl + boiled pepsin solution
Place all the test-tubes in a beaker of water at 35°C for 10 minutes.
I. In which test tube the suspension changes to clear solution.
II. Mention the purpose of the experiment
III. Explain the results of test-tube D.
IV. Mention the 2 things the experiment proves. 5
b. Distinguish between vertebrates and invertebrates. 5
ALL THE BEST