Biology Official 2023-2024 (English Medium) ICSE Class 10 Question Paper Solution

Duplicated chromosomes are joined at a point termed ______.

Centrosome

Centromere

Centriole

Chromatid

The process of conversion of ADP to ATP during photosynthesis is called ______.

Photolysis

Phagocytosis

Photophosphorylation

Polymerisation

The process in which water is lost from the margins of strawberry leaves is ______.

Osmosis

Imbibition

Diffusion

Guttation

The hormone that affects urination is ______.

Adrenaline

Vasopressin

Oestrogen

Thyroxine

Which one of the following helps in the opening of stomata?

Cobalt ions

Potassium ions

Magnesium ions

Aluminium ions

A zygote which has Y chromosome inherited from the father will develop into a ______.

Will depend on the chromosome inherited from the mother

Girl

Either boy or a girl

Boy

The ear ossicle that transports sound vibrations to the inner ear:

Stapes

Malleus

Incus

Cochlea

If a person has a heart attack, what must be done immediately?

P. Loosen his/her clothing

Q. Make him/her lie down in an airy room

R. Rush him/her to the hospital

S. Engage him/her in a conversation

P and Q

P and S

R and S

P, Q and R

Adjusting the focal length of the eye lens to view objects at different distances is done by ______.

Cornea

Iris

Ciliary muscles

Sclera

Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows:

P. Colour blindness and Malaria

Q. Albinism and Cholera

R. Haemophilia and Colour blindness

S. Haemophilia and Albinism

Who gave the correct examples?

P and Q

R and S

P and R

Q and S

Osmosis takes place when there is ______.

A freely permeable membrane

A cell wall

A selectively permeable membrane

An impermeable membrane

A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?

24

48

17

16

Assertion (A): Sympathetic nervous system prepares the body for violent action against abnormal conditions.

Reason (R): Sympathetic nervous system accelerates heartbeat.

Which of the following is correct?

Both A and R are True.

A is True, R is False.

A is False but R is True.

Both A and R are False.

Birth rate is the number of live births per thousand persons in ______.

1 year

2 years

10 years

20 years

Industrial melanism was observed in ______.

Mice

Peppered Moth

House Flies

Crow

Name the following:

Unicellular outgrowths from the epidermis of roots.

Name the following:

A defect in our eyes in which some parts of the object are in focus while the other parts are blurred.

Name the following:

The tropic movement of plant parts in response to chemicals.

Name the following:

The main nitrogenous waste formed in the body.

Name the Following:

The process of attachment of fertilized ovum to the uterine wall.

Arrange and rewrite the terms in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Australopithecus, Cro-Magnon, Homo erectus, Neanderthal man.

Arrange and rewrite the term in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Pupil, Aqueous humour, Retina, Vitreous humour.

Arrange and rewrite the terms in group in the correct order to be in a logical sequence, beginning with the term that is underlined:

Effector, Receptor, Motor neuron, Sensory neuron.

Arrange and rewrite the terms in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Loop of Henle, Distal convoluted tubule, Bowman's Capsule, Proximal convoluted tubule.

Arrange and rewrite the terms in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Water vapour, Soil water, Leaves, Ascent of Sap.

Study the diagram given below and fill in the blanks with suitable words:

In order to prove that carbon dioxide is necessary for

(a) ______, a potted plant is placed in dark for 48 hours to (b) ______ the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) ______ from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) ______, whereas the part of the left outside turns (e) ______ in colour.

Select the odd one from the following:

Prothrombin

Thrombin

Fibrinogen

Albumin

Choose the odd one out from the following terms and name the category to which the others belong:

Tonsils

Glomerulus

Spleen

Lymph nodes

Choose the odd one out from the following terms and name the category to which the others belong:

Neutrophils

Basophils

Monocytes

Eosinophils

Choose the odd one out from the following terms and name the category to which the others belong:

Leaves

Styrofoam

Grass

Cow Dung

Pulmonary artery

Renal artery

Coronary artery

Hepatic artery

Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs:

Expand the abbreviation - NADP.

Mention two adaptations in roots for absorption of water from the soil.

Differentiate between Afferent arteriole and Efferent arteriole.

Give two examples of water pollutants.

Ali has some pea plants in his garden which need a support to grow as seen in the picture given below:

1. Name the phenomenon depicted by the shoot in the given figure.
2. Define the above phenomenon.
3. Write the name of the part marked X.

Give the biological term for the surgical method of contraception in human females.

State two harmful effects of acid rain on the environment.

Enlist different advantages of transpiration.

Write any two objectives of Swachh Bharat Abhiyan.

Mohan is fond of playing basketball. His concentration is on shooting the ball into the opponent's basket as given in the picture.

1. Which part of the brain helps Mohan to concentrate in putting the ball into the basket?
2. Name the sense organ that helps to gauge the distance between the ball and the basket.
3. Name the part of the brain that co-ordinates all the voluntary muscles of his body.

Name the type of nerve which has the fibres of both sensory and motor neurons.

Differentiate between Australopithecus and Modern man based on body hair.

Give suitable biological reasons for the following statement:

The birth rate in India is very high. 

Give the exact location of the pericardium.

The exact location of the Bicuspid value

Given below is a schematic representation of the inheritance of the shape of the seeds of garden peas. Answer the questions that follow:

1. Which is the dominant and recessive allele of the trait?
2. What does the ratio 3 : 1 in the F₂ generation represent?
3. State Mendel's Law of Dominance.

Define the following term:

Diapedesis

Distinguish between Diabetes mellitus and Diabetes insipidus (endocrine gland concerned).

Give a scientific reason:

Carbon monoxide is highly dangerous when inhaled.

The diagram given below shows a section of the human ovary.

1. Name the process for the release of the part labelled 1.
2. Write the name of the structure marked 2.

Draw a neat, labelled diagram of a chloroplast.

Define the following term:

Hormones

Which part of the human ear gives ‘Static balance’ to the body? 

Which part of the human ear gives ‘ Dynamic balance’ to the body? 

Describe the structural differences between an artery and a vein.

Write any two limitations of using a Ganong's potometer to demonstrate the uptake of water.

A teacher drew the diagram of the heart on the blackboard and told the students to copy it in their notebooks. Mahesh couldn't see the diagram clearly as it appeared blurred to him.

1. Name the defect of the eye Mahesh is suffering from.
2. Where is the image formed in this defect?
3. Mahesh consults an eye doctor and is prescribed suitable lenses to correct the defect. Which type of lens do his spectacles have?

Define the following term:

Ultrafiltration

Name the mineral elements required for the clotting of blood.

Name the mineral element required for the synthesis of thyroxine.

State any two harmful effects of noise pollution on human health.

Why are RBCs efficient in their functions though they lack nucleus and mitochondria?

The diagram given below represents a stage in mitosis.

1. Identify the stage given above.
2. Give one reason to support your answer in (a).
3. Mention the number of chromosomes given in the diagram.