The Reproductive System assertion reason questions for Class 10 ICSE
1.) Assertion (A): Photosynthesis is the process by which plants convert light energy into chemical energy.
Reason (R): Chlorophyll, present in chloroplasts, is essential for capturing light energy.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
2.) Assertion (A): DNA is composed of four nucleotide bases: adenine, thymine, cytosine, and uracil.
Reason (R): RNA serves as a temporary copy of the genetic information stored in DNA.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
3.) Assertion (A): The Earth’s outer shell, the lithosphere, is divided into tectonic plates.
Reason (R): Plate tectonics is driven by the movement of molten rock in the mantle.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
4.) Assertion (A): Newton’s first law of motion states that an object at rest will remain at rest unless acted upon by an external force.
Reason (R): Acceleration is directly proportional to the net force applied to an object.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
5.) Assertion (A): Antibiotics are effective against viral infections.
Reason (R): Antibiotics target and kill bacteria by disrupting their cell walls or metabolic processes.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (c) A is True and R is False
6.) Assertion (A): The greenhouse effect contributes to the warming of the Earth’s surface.
Reason (R): Greenhouse gases trap heat energy in the atmosphere.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
7.) Assertion (A): A light-year is a unit of time used to measure the speed of light.
Reason (R): Light travels at a constant speed of 300,000 kilometers per second.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
8.) Assertion (A): Enzymes are biological catalysts that speed up chemical reactions in living organisms.
Reason (R): Enzymes alter the equilibrium position of chemical reactions.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
9.) Assertion (A): Electrons have a positive charge.
Reason (R): Protons have a negative charge.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (d) Both A and R are False
10.) Assertion (A): In the electromagnetic spectrum, gamma rays have longer wavelengths than radio waves.
Reason (R): Gamma rays have higher energy and shorter wavelengths than radio waves.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
11.) Assertion (A): The pH scale is a measure of the concentration of hydrogen ions in a solution.
Reason (R): A pH of 7 is considered neutral, indicating a balance between acidic and basic conditions.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
12.) Assertion (A): Mitosis is the process of cell division that produces haploid cells.
Reason (R): Meiosis is responsible for producing gametes with half the chromosome number.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
13.) Assertion (A): The Doppler effect explains the change in pitch of a sound as the source or observer moves.
Reason (R): The Doppler effect is only applicable to light waves.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
14.) Assertion (A): The function of white blood cells is to carry oxygen in the bloodstream.
Reason (R): Hemoglobin is present in white blood cells.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (d) Both A and R are False
15.) Assertion (A): The Earth’s ozone layer is located in the stratosphere and protects living organisms from harmful ultraviolet (UV) radiation.
Reason (R): Ozone is composed of three oxygen atoms.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
16.) Assertion (A): The nucleus is the control center of a eukaryotic cell, containing genetic material.
Reason (R): Prokaryotic cells lack a nucleus and membrane-bound organelles.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
17.) Assertion (A): The law of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.
Reason (R): The total energy of a closed system remains constant over time.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
18.) Assertion (A): Biomes are large geographical areas characterized by distinct climate, flora, and fauna.
Reason (R): Deserts receive high amounts of rainfall and are known for their lush vegetation.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
19.) Assertion (A): The Hubble Space Telescope is an optical telescope that observes celestial objects in ultraviolet, visible, and near-infrared wavelengths.
Reason (R): The Hubble Space Telescope is located on the surface of the Moon.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
20.) Assertion (A): Hemoglobin is a protein in red blood cells that binds and transports oxygen.
Reason (R): Hemoglobin contains iron, which gives blood its red color.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
21.) Assertion (A): The Big Bang theory is the prevailing cosmological model that explains the origin of the universe.
Reason (R): The universe is currently contracting in a process known as the Big Crunch.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
22.) Assertion (A): Chlorofluorocarbons (CFCs) contribute to the depletion of the ozone layer.
Reason (R): Ozone depletion allows more ultraviolet (UV) radiation to reach the Earth’s surface.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
23.) Assertion (A): Plate boundaries are locations where earthquakes are most likely to occur.
Reason (R): Earthquakes are caused by the movement of tectonic plates.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
24.) Assertion (A): The Krebs cycle is a part of cellular respiration that occurs in the mitochondria.
Reason (R): The Krebs cycle produces ATP, which is the primary energy currency of cells.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
25.) Assertion (A): A light microscope can resolve structures that are smaller than the wavelength of visible light.
Reason (R): Electron microscopes use beams of electrons to achieve higher resolution than light microscopes.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
26.) Assertion (A): In the scientific method, a hypothesis is a proven fact.
Reason (R): Experimentation is a crucial step in testing a hypothesis.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (c) A is True and R is False
- Assertion (A): Antibodies are proteins produced by the immune system to neutralize pathogens.
Reason (R): Vaccination involves the introduction of weakened or inactive pathogens to stimulate antibody production.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
28.) Assertion (A): Erosion is a geological process that involves the movement of weathered rock and soil.
Reason (R): Wind and water are common agents of erosion.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
29.) Assertion (A): The human brain consists of three main parts: the cerebrum, cerebellum, and medulla oblongata.
Reason (R): The cerebrum is responsible for controlling voluntary movements and higher cognitive functions.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
30.) Assertion (A): Nucleic acids, such as DNA and RNA, are composed of nucleotides.
Reason (R): Nucleotides consist of a sugar molecule, a phosphate group, and a nitrogenous base.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
31.) Assertion (A): A catalyst increases the rate of a chemical reaction by altering the equilibrium position.
Reason (R): Catalysts are consumed in the chemical reaction they catalyze.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (d) Both A and R are False
32.) Assertion (A): The cornea is the transparent front part of the eye that helps focus light.
Reason (R): The lens of the eye changes shape to adjust the focus for near or distant objects.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
33.) Assertion (A): Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.
Reason (R): The endoplasmic reticulum is a membrane-bound organelle involved in protein synthesis.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True
34.) Assertion (A): Gravity is a force that depends on the mass and distance between two objects.
Reason (R): Objects fall towards the Earth because of the gravitational pull exerted by the Moon.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (a) A is False and R is True
35.) Assertion (A): The Hardy-Weinberg equilibrium is a principle stating that the genetic makeup of a population remains constant from generation to generation in the absence of other influences.
Reason (R): Genetic drift and natural selection are factors that can disrupt the Hardy-Weinberg equilibrium.
(a) A is False and R is True
(b) Both A and R are True
(c) A is True and R is False
(d) Both A and R are False
Answer:- (b) Both A and R are True