ICSE question bank

Every question in the vault, filterable by class, subject, chapter, topic, year, marks, difficulty, type and source. The filters live in the URL, so any view you build can be shared.

260 questions

ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Assertion (A): Deficiency of antidiuretic hormone causes an increase in urination.
Reason (R): Antidiuretic hormone acts on the kidney to reabsorb water from the kidney tubules.
MCQ
ICSE Class X 2025
Class 10 · Biology
In the last century, the human population has increased tremendously. Death rate has reduced and
life expectancy has increased. This rapid growth has placed significant pressure on resources. Global
cooperation is needed for environmental preservation.
Overpopulation
(a) Mention any one reason for reduction in the death rate.
(b) Name any one resource that is under pressure due to population explosion.
2 marksShort answer
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Ajay and Vijay are siblings. Ajay can roll his tongue while Vijay cannot. What is the genotype of their
parents?
MCQ
ICSE Class X 2025
Class 10 · Biology
Vineet’s day begins with a cup of piping hot coffee. Caffeine is a stimulant present in coffee which
increases the circulation of Adrenaline in the body. Vineet feels refreshed, alert and focussed.
Coffee
(a) Name the organ that is stimulated by caffeine which makes Vineet alert and focussed.
(b) Give the collective term for the protective membranes of the organ mentioned in (a).
(c) Which part of the autonomic nervous system increases the secretion of Adrenaline?
3 marksShort answer
ICSE Class X 2025
Class 10 · Biology
Mention any two functions of amniotic fluid.
2 marksShort answer
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
The optimum temperature for photosynthesis is:
MCQ
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Observe the following picture, identify the defect and the cause of the defect.
MCQ
ICSE Class X 2025
Class 10 · Biology
Given below is an outline of the human body showing the important endocrine glands. Match the
glands marked (a) to (e) with their correct functions:
Example: (f) - 6. Secretes Testosterone.
Endocrine glands Functions
1. Prepares the body to face stress.
2. Secretes tropic hormones
(a)
3. Secretes oestrogens
(b) 4. Maintains blood sugar level
5. Regulates basal metabolism
6. Secretes testosterone.
(c)
(d)
(e)
(f)
SECTION – B (40 Marks)
(Attempt any four questions from this Section.)
5 marksLong answer
ICSE Class X 2025
Class 10 · Biology
Ahmed had a severe throat infection. After a few days he developed an earache too. What could be the
reason for the pain in his ears? Explain.
2 marksShort answer
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Assertion(A): Arachnoid layer helps in speeding up the transmission of nerve impulses along the axons.
Reason(R): Axon endings at the synapse secrete acetylene.
MCQ
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Assertion (A): A turgid plant cell is in a balanced state.
Reason (R): In a turgid cell, turgor pressure and wall pressure are equal and in the same direction.
MCQ
ICSE Class X 2025
Class 10 · Biology
Mr. Sharma is a 76-year-old man. His vision was gradually becoming blurred. He consulted an eye doctor
and it was diagnosed as cataract.
Health Eye Catarace Eye
(a) Which part of the eye does cataract affect?
(b) Why does the vision become blurred?
2 marksShort answer
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
Many nuclear power plants are constructed near water sources. They use water for cooling their
machinery and release it back into the water stream. Identify the kind of pollution caused.
MCQ
ICSE Class X 2025
Class 10 · Biology
Write the overall chemical equation for photosynthesis.
1 markShort answer
ICSE Class X 2025
Class 10 · Biology
Mention the two pairs of nitrogenous bases that are present in a DNA strand and pair with each other
by hydrogen bonds.
2 marksShort answer
ICSE Class X 2025
Class 10 · Biology
Draw a neat, labelled diagram of an animal cell showing metaphase with four chromosomes.
3 marksDiagram based
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
The number of live births per thousand people per year is called:
MCQ
ICSE Class X 2025
Class 10 · Biology
A farmer cultivates a unique species of tomato plants. The two traits selected for breeding were: Colour
of the fruits and height of the plants. The farmer initially crosses a homozygous tall plant bearing red
fruits (TTRR) with a dwarf plant bearing yellow fruits (ttrr) and the genotype of all the offsprings of the
F1 generation was TtRr. Next, he crosses two F1 generation plants (TtRr).
Tall plant with red fruit Dwarf plant with yellow fruits
(a) Explain the phenotype of the offsprings of the F1 generation obtained from the initial cross.
(b) Mention the phenotypic ratio of the F2 generation offsprings.
(c) State Mendel’s Law of Independent Assortment.
3 marksShort answer
ICSE Class X 2025
Class 10 · Biology
15] Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only).
A phase of cell division where the spindle fibres disappear is:
MCQ
ICSE Class X 2025
Class 10 · Biology
Draw a neat, labelled diagram to show that oxygen is released during photosynthesis.
3 marksDiagram based