Solving ICSE Class 10 Biology Previous Year Question Papers ICSE Class 10 Biology Question Paper 2022 Semester 2 is the best way to boost your preparation for the board exams.
ICSE Class 10 Biology Question Paper 2022 Solved Semester 2
Time: 1 1/2 hour
Maximum Marks: 40
General Instructions :
- Answers to this Paper must be written on the paper provided separately.
- You will not be allowed to write during the first 10 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 A and any any three questions from Section B.
- The marks intended for questions are given in brackets [ ].
Section – A
(Attempt all questions from this Section)
Question 1.
Choose the correct answers to the questions from the given options. (Do not copy the question. Write the correct answer only.) [10]
(i) The mineral element in haemoglobin :
(a) Manganese
(b) Iron
(c) Sodium
(d) Calcium
Answer:
(b) Iron
(ii) The number of cranial nerves in humans are :
(a) 16 pairs
(b) 31 pairs
(c) 39 pairs
(d) 12 pairs
Answer:
(d) 12 pairs
(iii) Gigantism and Acromegaly are due to :
(a) Hypersecretion of Growth hormones
(b) Hypersecretion of Thyroxine
(c) Hyposecretion of Growth hormone
(d) Hyposecretion of Thyroxine
Answer:
(a) Hypersecretion of Growth hormones
(iv) Pericardium covers the :
(a) Heart
(b) Brain
(c) Spinal cord
(d) Eyeball
Answer:
(a) Heart
(v) The circular opening in the centre of iris :
(a) Lens
(b) Cornea
(c) Sclera
(d) Pupil
Answer:
(d) Pupil
(vi) The blood vessel that carries oxygenated blood is :
(a) Pulmonary artery
(b) Pulmonary vein
(c) Renal vein
(d) Hepatic vein
Answer:
(b) Pulmonary vein
(vii) Organ of corti is present inside the :
(a) Cochlea
(b) Semicircular canals
(c) Sacculus
(d) Utriculus
Answer:
(a) Cochlea
(viii) The structure that stores urine temporarily is :
(a) Ureter
(b) Urethra
(c) Urinary bladder
(d) Kidneys
Answer:
(c) Urinary bladder
(ix) Islets of Langerhans are located in :
(a) Liver
(b) Pituitary gland
(c) Spleen
(d) Pancreas
Answer:
(d) Pancreas
(x) The main nitrogenous waste formed in the human body :
(a) Uric acid
(b) Urea
(c) Ammonia
(d) Creatinine
Answer:
(b) Urea
Section – B
(Attempt any three questions from this Section)
Question 2.
(i) Simple goitre is usually seen in people living in the hilly regions. Give two reasons for the statement. [2]
Answer:
2 reasons for simple goitre is usually seen in people living in hilly region are :
(a) In hilly areas soil has deficiency of iodine.
(b) It is caused by hyposecretion of thyroxine, due to deficiency of iodine.
(ii) What are the two types of blood circulation in humans ? [2]
Answer:
Two circulations in human body are :
(a) Pulmonary Circular (pertains to lungs)
(b) Systemic Circulation (pertains to major circulation in body)
(iii) Mention the three major steps involved in the production of urine. [3]
Answer:
3 major steps involved in production of urine are
(a) Ultrafiltration
(b) Reabsorption
(c) Tubular Secretion
(iv) Draw a neat diagram of a Neuron and label any two parts. |3]
Answer:
Question 3.
(i) What is Adrenal Virilism ? What causes this condition ? [2]
Answer:
When a mature woman develops certain male features, such as, beard, moustaches and deep male voice. This condition is called Adrenal Virilism. This condition is called Adrenal virilism. It is due to overgrowth of adrenal cortex.
(ii) Which is the light sensitive layer of the eyeball ? [2]
Where exactly is the image formed on this layer ?
Answer:
The light sensitive layer of the eyeball is Retina.
Red cell → sensitive to dim light.
Cone cell → sensitive to bright light.
Image is formed on yellow spot (Macule Lutea) on Retina.
(iii) Study the diagram given below and answer the questions that follow: [3]
(a) Identify the defect of the eye by mentioning the technical term.
(b) Mention one reason for this defect.
(c) Name the type of lens used to correct this defect.
Answer:
(a) Hypermetropia or Hyperopia.
(b) Defect reason It is due to shortening of eyeball from front to back or lens is too flat.
(c) It can be correct by using convex lens.
(iv) Give the biological terms for the three tiny bones present in the middle ear. [3]
Answer:
Ear Ossicle is the biological term for the three tiny bones. Tiny bones are :
- Malleus
- Incus
- Stapes
Question 4.
(i) Name the endocrine gland that secretes Thyroxine. [2]
Give any one function of Thyroxine.
Answer:
Thyroxine is secreted by Thyroid gland
Function → It regulates basal metabolism.
(ii) Give the full form of the abbreviation ACTH. [2]
Which gland secretes this hormone ?
Answer:
ACTH → Adrenocorticotropic Hormone
It is secreted by Pituitary gland.
(iii) Define the term Synapse. [3]
How are Cytons and Axons of neutrons placed in the Cerebrum ?
Answer:
Synapse is point of contact between terminal branches of the axon of neuron with dendrites of another neuron ’ separated by a fine gap. Axons are placed in inner portion whereas cytons are placed in outer portion of brain but in spinal cords, axons are placed in outer side and cytons are placed in inner portion.
Cerebrum is part of brain.
(iv) Name the three membraneous coverings of the human brain. [3]
Answer:
3 membraneous coverings of human brain :
- Dura mater – outennost membrane
- Arachnoid – middle membrane
- Pia mater – innermost membrane
Question 5.
(i) Name the nerve that transmits impulses to the brain from : [2]
(a) Ear (b) Eye
Answer:
(a) Ear → Auditory nerve
(b) Eye → Optic nerve
(ii) A mature mammalian erythrocyte lacks nucleus and mitochondria but is efficient in its functioning. Explain by giving suitable reasons. [2]
Answer:
A mature erythrocyte lacks nucleus and mitochondria. So as to make a place for accommodation of more haemoglobin and hence more oxygen molecule. Lack of such organelles also provides percular biconcave appearance of RBC’s that aids in efficient diffusion.
(iii) The diagram given below is that of a human brain. Answer the questions that follow : [3]
(a) Label the parts numbered 2 and 3.
(b) State any one function of the part numbered 1.
Answer:
(a) 2 → Cerebellum
3 → Medulla oblongata
(b) Part 1 is cerebrum and it controls all the voluntary actions, consciousness and will power.
(iv) What is a reflex action ? Name the two types of reflexes. [3]
Answer:
Reflex action is an automatic / quick / immediate involuntary action in body brought about by a stimulus.
Two types of Reflexes are :
- Natural (inborn) e.g. → blinking, sneezing
- Conditioned (acquired) e.g. → taste, smell of familiar taste.
Question 6.
(i) Give the exact location of Pulmonary semilunar valve. When does it close ? [2]
Answer:
Pulmonary semilunar valve is located between right ventricle and pulmonary artery and has three cups. It prevents back flow of blood into right ventricle.
(ii) Name the hormones whose deficiency causes: [2]
(a) Diabetes mellitus
(b) Diabetes insipidus
Answer:
(a) Diabetes mellitus → Insulin
(b) Diabetes insipidus → ADR (Antidiuretic Hormone)
(iii) Draw a neat diagram of a longitudinal section of a human kidney and label Renal Cortex and Renal Medulla on the diagram. |3]
Answer:
(iv) Mention one function for each of the following: [3]
(a) Lymphocytes
(b) Thrombocytes
(c) Neutrophils
Answer:
(a) Lymphocytes → produce anti-bodies
(b) Thrombocytes → helps in blood clotting
(c) Neutrophils → engulfs and destroys bacteria