ICSE Specimen Class 10 Biology Sample Paper 2024 Solution
ICSE Board Class 10 Biology Sample Paper 2024 Solution www.cisce.org. New Sample Paper Solution ICSE Board 2024 Biology all Question Answers by Expert Teachers. Students of Class X who are preparing for Board Exam 2024 can solved here Biology Sample Paper.
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 answers only.)
(1) Loss of water as droplets from the hydathodes is called:
a) Transpiration
b) Bleeding
c) Guttation
d) Evaporation
Answer: – C) guttation
Guttation is the process in which the droplets of water are lossed through hydathodes due to excess water pressure. This excess water pressure lifts the water droplets in upward manner through xylem tissue and thus the droplets are finally removed through the margins of the leaves. It is mostly occur when there is more moisture in the atmosphere.
(ii) Synthesis phase in the cell cycle is called so, because of the synthesis of more:
(a) Glucose
(b) Proteins
(c) RNA
(d) DNA
Answer : – D) DNA
In the synthesis phase or S phase there is formation of more DNA or Deoxyribonucleic acid. S phase is the phase in which replication of DNA occurs which finally leads to production of more DNA material.
(iii) While playing with his friends, Peter inserted a stick into his ear. He lost his hearing due to the rupture of:
(a) Ear drum
(b) Pericardium
(c) Cornea
(d) Pinna
Answer: – A) Ear drum
Due to insertion of the stick inside the ears peter lost his ear drum which is a thin layer of tissue, this ear drum performs the function of hearing, by transmitting sound vibrations from outer side to inner side.
(iv) The prime source of Chloro fluorocarbons is:
(a) Vehicular emissions
(b) Refrigeration equipment
(c) Sewage
(d) Effuents
Answer : – b) Refrigeration equipment
Refrigeration equipment is the primary source of Chlorofluorocarbons. These CFCs were commonly used in the refrigeration, after it is found out that CFCs has main role in the ozone layer depletion is has been reduced the uses of CFCs.
(v) Oxygenated blood to heart is supplied by:
(a) Hepatic artery
(b) Coronary artery
(c) Renal artery
(d) Pulmonary artery
Answer : – b) coronary artery
The coronary artery, which is a branch of main aorta, supplies the heart with oxygenated blood. These arteries provide the heart muscle with some vital nutrients and oxygen, helping the muscle to pump properly while maintaining its function.
(vi) Assertion (A): There is frequent urination in summer than in winter. Reason
(R): In summer we lose a lot of water as sweat, so the kidneys reabsorb more water. Hence, urine formed is less in summer than in winter.
(a) Both A and R are True
(b) Both A and R are False
(c) A is True and R is False
(d) A is False and R is True
Answer:- d) A is False and R is True
The correct option is (d) A is False and R is True. In summer, we do lose water through sweat, and the kidneys do reabsorb more water. However, this does not result in less urine formation. Instead, normal urination is more likely to occur in summer due to increased fluid intake.
(vii) The age restrictions for marriage for boys and girls by law in India is:
(a) Boys 18 years, Girls 21 years
(b) Boys 17 years, Girls 16 years
(c) Boys 21 years, Girls 18 years
(d) Boys 20 years, Girls 17 years
Answer: – (a) Boys 18 years, Girls 21 years
As per law in India, the minimum age for marriage for boys is 18 years, while for girls, it is 21 years, therefore the correct option is (a) Boys 18 years, Girls 21 years.
(viii) Hari is fond of watching the fish in an aquarium. So, he set up an aquarium in his house. Along with a number of fresh water fish, he also placed a clown fish which is a salt water fish. After few hours, the clown fish was found dead and floating on water. This was due to:
(a) Endosmosis
(b) Exosmosis
(c) Osmoregulation
(d) Excretion
Answer : – (b) Exosmosis.
When clown fish and a saltwater fish, were placed in a freshwater aquarium, the exosmosis occurred . Exosmosis is the movement of water from lower concentration to the higher concentration. freshwater had a lower salt concentration, thus water moved into the clown fish’s body, causing it to swell and interrupt its internal balance. This lead to the clown fish death and found floating on the water.
(ix) The solvent used for dissolving chlorophyll while testing a leaf for starch is:
(a) Sodium hydroxide
(b) Lime water
(c) Water
(d) Ethyl alcohol
Answer : – d) ethyl alcohol
Ethyl alcohol is used as a solvent to dissolve chlorophyll and remove its green color, making it easier to detect the presence of starch in a leaf during testing.
(x) The structure related to storage and maturation of sperms in a human male is:
(a) Epididymis
(b) Epidermis
(c) Epithelium
(d) Endothelium
Answer:- b) Epididymis
The epididymis is a structure in the male reproductive system that is responsible for the storage and maturation of sperm. It is a storage site for mature sperm until they are ejaculated during sexual activity.It is a coiled tube located on the back of each testicle.
(xi) A sequence of DNA has 200 nitrogenous base pairs, of which 100 are ThymineAdenine pairs. What is the number of Cytosine-Guanine pairs in this sequence:
(a) 50
(b) 200
(c) 100
(d) 25
Answer: – c) 100
The number of Cytosine-Guanine pairs in this sequence can be determined by using the base pairing rules in DNA. Adenine pair off with Thymine (A-T), similarly Cytosine pair off with Guanine (C-G). here we have given 100 Thymine-Adenine pairs in the sequence, there will also be 100 Cytosine-Guanine pairs. Therefore, the answer is (c) 100.
(xii) The stress hormone in plants which functions during a drought is:
a) Auxins
(b) Abscisic acid
(c) Ethylene
(d) Cytokinins
Answer: – (b) Abscisic acid
Abscisic acid is a plant hormone that regulates water conservation during drought by promoting stomatal closure and triggering adaptive responses.
(xiii) Compressed natural gas (CNG) is proposed to be a better alternative to fossil fuel. Which of the following reasons makes it a better alternative?
Combustion leaves little or no residue
Absence of Carbon in CNG
Easily available
(a) Only P
(b) Only Q
(c) Only P and R
(d) Only Q and R
Answer: – (c) Only P and R
Compressed natural gas is the better alternative to fossil fuels due to combustion leaves little or no residue and due to easy availability of it. But Q is incorrect as CNG includes carbon in it .
(xiv) The ground substance present in chloroplast is:
(a) Stoma
(b) Stroma
(c) Grana
(d) Thylakoids
Answer: – (b) Stroma
The ground substance present in chloroplast is called stroma. It is a gel-like matrix where different metabolic reactions occur, including the synthesis of carbohydrates during photosynthesis.
(xv) Lata wanted to cross the road. She looked on either side of the road and then walked across to the other side of the road. Which of the following is / are involved in the process described above?
1.) Cerebrum
2.) Cerebellum
3.) Skeletal muscles
4.) Medulla Oblongata
(a) Only 3
(b) Only 1 and 3
(c) Only 1, 3 and 4
(d) Only 1, 2 and 3
Answer: – (b) Only 1 and 3
Only the cerebrum and skeletal muscles are involved in the process because cerebrum involved in the process of sensory information or decision making and skeletal muscle is involved in the physical movement of the body, which are important movement for lata to cross the road.
Question 2
(i) Name the following:
a) The respiratory pigment in Erythrocytes.
Answer : – The respiratory pigment present in erythrocytes is known as Hemoglobin.
b) The tissue that transports manufactured food from the leaves to all the parts of the plant.
Answer : – The tissue that transports manufactured food from the leaves to all parts of the plant is Phloem tissue. And the another tissue which carries the water molecules and other nutrients along with it are known as xylem tissue.
C) The type of gene, which in the presence of a contrasting allele, is not expressed.
Answer : – The type of gene, which in the presence of a contrasting allele, is not expressed is Recessive gene.
d) The duct which carries urine from the urinary bladder to outside the body.
Answer : – The duct which carries urine from the urinary bladder to outside the body is Urethra.
e) The collective term for the protective membranes of the brain.
Answer : -The collective term for the protective membranes of the brain is Meninges.
(ii) Arrange and rewrite the terms in each group in the correct order so as to be in a logical sequence beginning with the term that is underlined.
(a) Snake, Grass, Frog, Grasshopper
Answer :-(a) Grass, Grasshopper, Frog, Snake
Explanation: Grass is the primary producer, followed by the Grasshopper (herbivore) that feeds on grass. The Frog is a primary consumer that feeds on the Grasshopper, and the Snake is a secondary consumer that feeds on the Frog.
(b) Cochlea, Malleus, Pinna, Stapes
Answer :- (b) Pinna, Malleus, Incus, Stapes
Explanation: The Pinna is the outer ear that collects sound waves, which then travel to the Malleus (hammer), Incus (anvil), and finally to the Stapes (stirrup) in the middle ear.
(c) Fibrin, Thrombin, Fibrinogen, Platelets
Answer :- (c) Platelets, Thrombin, Fibrinogen, Fibrin
Explanation: Platelets are involved in blood clotting. When a blood vessel is damaged, Thrombin is activated, which then converts Fibrinogen into Fibrin. Fibrin forms a mesh-like structure to create a blood clot.
(d) Endodermis, Cortex, Xylem, Epidermis
Answer :- (d) Epidermis, Cortex, Endodermis, Xylem
Explanation: The Epidermis is the outermost layer of a plant, followed by the Cortex, which is responsible for storage and support. The Endodermis is the innermost layer of the cortex, and the Xylem is the vascular tissue responsible for transporting water and nutrients.
(e) Embryo,Foetus, Blastocyst, Morula
Answer :- (e) Morula, Blastocyst, Embryo, Fetus
Explanation: After fertilization, the zygote undergoes cell division and forms a solid ball of cells called a Morula. The Morula develops into a hollow ball of cells called a Blastocyst, which implants into the uterus. The Blastocyst then develops into an Embryo, which further develops into a Fetus during pregnancy.
d) Fill in the blanks with suitable words:
The technical term for short sightedness is (a) __________. This defect is caused because the eyeball is (b) __________ from front to back or the lens is too (c) __________. It can be corrected by using a suitable (d) __________ lens. The power of the lens is mentioned in (e) __________.
Answer : –
(a) Myopia.
(b) Elongated.
(c) Convex.
(d) Concave.
(e) Diopters.
The technical term for short sightedness is Myopia . This defect is caused because the eyeball is Elongated from front to back or the lens is too Convex. It can be corrected by using a suitable Concave lens. The power of the lens is mentioned in Diopters.
(iv) Choose the odd one out from the following terms and name the category to which the others belong:
(a) Newspapers, Vegetable peels, Electric bulbs, Animal excreta
Answer: – Electric bulbs.
The category to which the others belong is biodegradable Waste or Discarded items. But electrical bulbs belongs to non – biodegradable waste.
(b) Renal pelvis, Renal artery, Renal Cortex, Renal medulla
Answer: -Renal artery
The category to which the others belong is Parts of the Kidney. But ranal artery belongs to to the part of blood vessel coming to the Kidney.
(c) Urochrome, Urea, Keratin, Uric acid
Answer: – Keratin
The category to which the others belong is Waste Products or Substances in the body.
(d) Oval window, Cochlea, Auditory canal, Round window
Answer: – Auditory canal
The category to which the others belong is Parts of the outer ear. Auditory canal belongs to part of inner ear.
(e) ADH, TSH, ACTH, NADP
Answer: -NADP
The category to which the others belong is Hormones. NADP is a type of enzyme
Or an coenzyme.
(v) Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs.
Column I |
Column II |
a) Spinal Cord |
1. Adrenalin |
b) Adrenal medulla |
2. 44 |
c) Number of autosomes in man |
3. Nephrons |
d) Kidney |
4. 46 |
e) Adrenal cortex |
5. Thyroxine |
6. Neurons |
|
7. Cortisones |
Answer : –
Column I |
Answer |
a) Spinal Cord |
Neurons |
b) Adrenal medulla |
Adrenalin |
c) Number of autosomes in man |
46 |
d) Kidney |
Nephron |
e) Adrenal cortex |
Cortisones |
SECTION B
(Attempt any four questions from this Section.)
Question 3
(i) The gene of red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?
Answer: – If a person inherits a gene for red hair from their mother and a gene for black hair from their father, their hair color will be black. The gene for black hair is dominant over the recessive gene for red hair, so it will determine the person’s hair color.
(ii) State Mendel’s Law of Dominance.
Answer: – Mendel’s Law of Dominance states that when two individuals with contrasting traits are crossed, the offspring will express only the dominant trait in their phenotype. The recessive trait remains hidden but can be passed on to future generations.
(iii) What are Homologous chromosomes?
Answer: – Homologous chromosomes are a pair of chromosomes that have the same genes at the same loci, one inherited from the mother and one from the father. They are similar in length, shape, and carry genes for the same characteristics, although they may have different alleles.
(iv) Differentiate between Phenotype and Genotype.
Answer: – Phenotype refers to the observable characteristics or traits of an organism, such as physical appearance or behavior. Genotype, on the other hand, refers to the genetic makeup of an organism, specifically the combination of alleles present in its genes.
(v) Draw a neat, labelled diagram of a duplicated chromosome.
Answer: –
Question 4
(i) Mention the exact location of Corpus callosum.
Answer: – The Corpus callosum is located in the brain, specifically in the region known as the cerebrum. It is a thick band of nerve fibers that connects the two cerebral hemispheres.
(ii) What are the two hormones secreted by Corpus luteum?
Answer: – The two hormones secreted by the Corpus luteum are Progesterone and Estrogen. Progesterone helps prepare the uterus for pregnancy and supports early pregnancy, while Estrogen plays a role in the development and maintenance of female reproductive structures.
(iii) Differentiate between Menarche and Menopause.
Answer: – Menarche and Menopause are two different stages in a woman’s reproductive life can be clarified as follow:
– Menarche refers to the onset of the first menstrual period in a girl, usually occurring around puberty when the reproductive system matures.
– Menopause, on the other hand, is the natural cessation of menstrual periods and fertility in women. It typically occurs in middle age, around the age of 45-55, and marks the end of the reproductive phase.
(iv) What is the significance of placenta in the growth of foetus?
Answer: – The placenta plays a crucial role in the growth and development of the fetus. It is a temporary organ that forms during pregnancy and serves as a connection between the mother and the developing fetus. The placenta provides essential functions such as:
– Nutrient and oxygen exchange: The placenta facilitates the transfer of nutrients and oxygen from the mother’s bloodstream to the developing fetus, ensuring its proper growth and development.
– Waste elimination: It also helps eliminate metabolic waste products from the fetal bloodstream, transferring them to the mother’s bloodstream for excretion.
– Hormone production: The placenta produces hormones such as human chorionic gonadotropin (hCG), progesterone, and estrogen, which are vital for maintaining pregnancy, regulating fetal development, and preparing the mother’s body for childbirth.
– Immunological protection: It provides a barrier that protects the fetus from certain infections and helps regulate the immune response to prevent rejection of the fetus by the mother’s immune system.
(v) Draw a neat, labelled diagram of a human gamete that has the sex chromosome.Y
Answer: –
Question 5
(i) Explain the term – Photsynthesis
Answer: – Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a form of sugar) and oxygen. It is the primary way in which energy from the sun is captured and stored as chemical energy in plants.
(ii) Write the overall chemical equation of Photosynthesis.
Answer: – The overall chemical equation for photosynthesis is:
6CO2 + 6 H2O + light energy → C6H12O6 (glucose) + 6 O2
(iii) A potted plant having variegated leaves was exposed to sunlight for 3 hours. One of the leaves was plucked and tested for starch. What will be your observation after the starch test?
Answer: – After the starch test, if the leaf tested positive for starch, it would indicate that photosynthesis has occurred in the leaf during the 3 hours of exposure to sunlight. Starch is a complex carbohydrate that is produced and stored in plant cells as a result of photosynthesis. A positive result would suggest that the variegated leaf, despite having patches of different colors, was still capable of carrying out photosynthesis and producing starch.
(iv) The initial food prepared by a green plant is A, which is later converted to food B by polymerization. Name food A and food B.
Answer: – Food A, the initial food prepared by a green plant, is Glucose. Food B, which is produced by the polymerization of glucose, is Starch.
(v) Study the diagram given below and answer the questions that follow:
(a) Name the gas released when the setup was placed in sunlight.
Answer: – The gas released when the setup was placed in sunlight is Oxygen (O2)
(b) Give an example of an aquatic plant that can be used in the above experiment.
Answer: – An example of an aquatic plant that can be used in the above experiment is Elodea or Hydrilla.
(c) What will happen if a pinch of Sodium bicarbonate is added to the water?
Answer: – If a pinch of Sodium bicarbonate is added to the water, it will provide a source of carbon dioxide (CO2) for the aquatic plant, which is necessary for photosynthesis. Sodium bicarbonate releases carbon dioxide when dissolved in water, ensuring an adequate supply of carbon dioxide for the photosynthetic process.
Question 6
(i) Give the exact location of genes.
Answer: -The exact location of the genes are chromosomes. This are located on the chromosome which appeared as an threads. This chromosomes are found in the nucleus. DNA are the segments of genes which forms the chromosomes.
(ii) Differentiate between Karyokinesis and Cytokinesis.
Answer: -Karyokinesis and Cytokinesis are two distinct processes that occur during cell division:
– Karyokinesis: It is the division of the cell nucleus, specifically the separation of replicated chromosomes into two daughter nuclei.
Karyokinesis is further divided into phases like prophase, metaphase, anaphase, and telophase.
– Cytokinesis: It is the division of the cytoplasm and the formation of two separate daughter cells.
(iii) Mention two significant features of the stage Anaphase during Mitosis.
Answer: -Two significant features of the Anaphase stage during mitosis are:
1.) Chromosome separation: In Anaphase, the sister chromatids of each chromosome separate and move towards opposite poles of the cell.This process assures that each and every daughter cells receives a complete set of chromosomes in it.
2.) Spindle fiber contraction: Specialized microtubules called spindle fibers contract and pull the separated sister chromatids towards opposite poles of the cell. This movement is facilitated by the shortening of the spindle fibers and helps in the equal distribution of genetic material.
(iv) How many daughter cells are formed at the end of Mitosis and Meiosis?
Answer: -At the end of Mitosis, two daughter cells are formed. These daughter cells are genetically identical to each other and to the parent cell.
At the end of Meiosis, four daughter cells are formed. However, these daughter cells are genetically diverse due to the process of genetic recombination and the reduction in the number of chromosomes.
v) Study the diagram given below and answer the questions that follow:
a) Name the phenomenon depicted by the shoot in the above diagram.
Answer: -The phenomenon depicted by the shoot in the diagram is Phototropism, in which an plants shoot move towards the sunlight’s direction.
b) Which plant hormone plays an important role in the above movement?
Answer: -The plant hormone that plays an important role in the above movement is known as Auxin hormone.
c) Name one stimulus which gives a positive response for the roots but negative response for the shoot.
Answer: -One stimulus that gives a positive response for the roots but a negative response for the shoot is Gravity. Roots typically grow towards the gravitational force, while the shoot shows negative gravitropism and grows against the force of gravity.
Question 7
(i) What is the scientific name for man?
Answer: – The scientific name for man is Homo sapiens.
(ii) What are vestigial organs? Give one example.
Answer: -Vestigial organs are structures in an organism that have lost or greatly reduced their original function through evolution. One example of a vestigial organ in humans is the appendix, which is a small pouch-like structure attached to the large intestine. While it may have had a digestive function in our evolutionary ancestors, it is now considered to be a vestigial organ with no known significant function in humans.
(iii) State two structural differences between an artery and vein.
Answer: -Two structural differences between an artery and a vein are:
1.) Wall thickness: Arteries have thicker and more muscular walls compared to veins. This is because arteries carry blood under high pressure and need strong walls to withstand the force of blood flow. In contrast, veins carry blood at lower pressure and have thinner walls.
2.) Valves: Veins have valves present within their lumen to prevent the backflow of blood. Arteries, on the other hand, generally do not have valves as the high pressure of blood flow in arteries helps to maintain one-way flow.
(iv) Mention any two features of the Cro-Magnon man.
Answer: -Two features of the Cro-Magnon man, an early form of modern humans:
1.) Physical appearance: The Cro-Magnon man had a similar physical appearance to modern humans. They had a tall stature, straight limb bones, a high forehead, and a prominent chin.
2.) Cultural development: The Cro-Magnon man demonstrated advanced cultural development, including the creation of art and tools. They created intricate cave paintings and produced a wide variety of tools and weapons, indicating a high level of cognitive and artistic abilities.
(v) Study the picture given below and answer the questions that follow:
(a) Name the category of waste that is being disposed.
Answer: – The category of waste being disposed in the picture is medicinal waste or pharmaceutical wastes which are obtained from the hospitals .
(b) Give an example of such a waste.
Answer: – An example of such waste includes medications, unused or left out precipitations, pharmaceutical waste, empty medicinal containers, used gloves, syringes, masks, expired medicines etc.
(c) Are they hazardous to humans and animals? Give a suitable reason to justify your answer.
Answer: -Yes, they can be hazardous to humans and animals, if these are not properly handles or disposed. Many of the medicinal products contains active ingredients which on consumption can cause harmful side effects. Also this type of pharmaceutical waste causes harmful contamination to the environment.
Question 8
i) Define – Osmosis.
Answer : –
The process of Osmosis can be defined as the movement of water molecules from the lower level concentration of the solute towards the higher level concentration of the solute through a semi permeable membrane untill both the sides are equals in the level of solute concentration.
ii) Name the two sensory cells in retina meant for light adaptation.
Answer : – The two sensory cells in the retina meant for light adaptation are rods and cones.
Rods are responsible for vision in dim light and black-and-white vision, while cones are responsible for color vision and visual acuity in bright light.
iii) Mention one function each for – Cerebrum and Cerebellum.
Answer : – The cerebrum is responsible for higher thinking functions such as conscious thought, reasoning, analysis, recollection, and voluntary muscle movements.
While the cerebellum, on the other hand, is primarily involved in coordination, balance, posture, and very well motor control.
iv) State any two objectives ofSwachh Bharat Abhiyan.
Answer : – Two objectives of Swachh Bharat Abhiyan (Clean India Campaign) are given as follow:
1.) To achieve and maintain hygiene in public spaces, including streets, roads, and infrastructure, through proper waste management and sanitation practices.
2.) To encourage behavioral changes and awareness among individuals and group of people regarding cleanliness, and sanitation practices, leading to improved health and overall benefit.
v) Given below is the diagram of human blood smear. Answer the questions that follow:
(a) Mention one structural difference between 1 and 2.
Answer : – One structural difference between 1 and 2 in the diagram of the human blood smear is the shape.
Structure 1 represents red blood cells also known as erythrocytes, which are disc-shaped and it lack a nucleus in it. Structure 2 represents white blood cells also termed as leukocytes, which are irregularly shaped and have a prominent nucleus.
(b) What is the function of part 3?
Answer : – Part 3 in the diagram is the platelets known as thrombocytes.
The function of platelets is to help in blood clotting and preventing excessive bleeding when there is rupture in blood vessels due to any accidental causes.
(c) Name the part labelled 4.
Answer : – The part labelled 4 in the diagram is the monocyte.
Monocytes are a type of white blood cell involved in immune responses, including phagocytosis (surrounding and destroying foreign particles) and antigen production.
Thanks a lot