Grade 11 Integrated Science

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| By Gervent Gayle
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Gervent Gayle
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  • 1/24 Questions

    Which nutrient is important for building strong muscle ?

    • Fat
    • Sugar
    • Starch 
    • Protein 
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About This Quiz

This Grade 11 Integrated Science quiz covers cell biology, genetics, human physiology, and photosynthesis, assessing understanding of basic biological processes and structures.

Grade 11 Integrated Science - Quiz

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  • 2. 

    Which of the following systems is likely to be affected by the presence of dust in the air 

    • Digestive 

    • Endocrine 

    • Respiratory 

    • Circulatory 

    Correct Answer
    A. Respiratory 
    Explanation
    The respiratory system is likely to be affected by the presence of dust in the air. Dust particles can irritate the respiratory tract and cause inflammation, leading to symptoms such as coughing, wheezing, and difficulty breathing. Inhaling dust can also trigger allergic reactions in some individuals. Prolonged exposure to dust can result in chronic respiratory conditions such as asthma, bronchitis, or even lung disease. Therefore, the respiratory system is particularly vulnerable to the presence of dust in the air.

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  • 3. 

    Solar energy is transferred through space by 

    • Radiation 

    • Convection 

    • Conduction 

    • Evaporation 

    Correct Answer
    A. Radiation 
    Explanation
    Solar energy is transferred through space by radiation. Radiation refers to the emission of energy as electromagnetic waves or particles. In the case of solar energy, the sun emits electromagnetic waves, specifically in the form of visible light and heat, which travel through space and reach the Earth. This transfer of energy does not require a medium, making radiation the most suitable explanation for how solar energy is transferred through space.

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  • 4. 

    Which component of the human blood transport oxygen 

    • Platelets 

    • Phagocytes 

    • Lymphocytes 

    • Red blood cell

    Correct Answer
    A. Red blood cell
    Explanation
    Red blood cells, also known as erythrocytes, are responsible for transporting oxygen throughout the body. They contain a protein called hemoglobin, which binds to oxygen in the lungs and releases it to the tissues. This process is essential for delivering oxygen to cells for energy production and maintaining overall bodily functions. Platelets are involved in blood clotting, phagocytes are responsible for engulfing and destroying pathogens, and lymphocytes play a role in the immune response. However, none of these components are primarily responsible for oxygen transport.

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  • 5. 

    Antibodies are important in the human body because they: 

    • Control Hormones 

    • Protect against disease 

    • Help make red blood cell 

    • Regulate blood glucose level 

    Correct Answer
    A. Protect against disease 
    Explanation
    Antibodies are important in the human body because they protect against disease. Antibodies are proteins produced by the immune system in response to the presence of foreign substances, such as bacteria or viruses. They bind to these foreign substances, marking them for destruction by other immune cells. This helps to prevent and fight off infections and diseases, making antibodies crucial for maintaining overall health and well-being.

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  • 6. 

    Which of the following hormones regulate blood sugar level in humans 

    • Insulin 

    • Secretin 

    • Prolactin 

    • Adrenalin 

    Correct Answer
    A. Insulin 
    Explanation
    Insulin is the hormone that regulates blood sugar levels in humans. It is produced by the pancreas and helps to lower blood sugar levels by facilitating the uptake of glucose from the bloodstream into cells. Insulin also promotes the storage of glucose in the liver and muscles as glycogen. Without sufficient insulin, blood sugar levels can become too high, leading to a condition called hyperglycemia, which is characteristic of diabetes. Therefore, insulin plays a crucial role in maintaining normal blood sugar levels in the body.

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  • 7. 

    Which of the following hormones is produce in emergency situations 

    • Insulin 

    • Secretin 

    • Prolactin 

    • Adrenaline  

    Correct Answer
    A. Adrenaline  
    Explanation
    Adrenaline is the correct answer because it is a hormone that is produced by the adrenal glands in emergency situations. It helps to prepare the body for a fight or flight response by increasing heart rate, dilating blood vessels, and mobilizing stored energy. Insulin is not produced in emergency situations, but rather helps regulate blood sugar levels. Secretin is a hormone that helps regulate the digestive system. Prolactin is a hormone involved in milk production.

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  • 8. 

    The structure responsible for the transfer of characteristic from parents to offspring is the ?

    • Vacuole 

    • Cytoplasm 

    • Chromosome 

    • Cell Membrane 

    Correct Answer
    A. Chromosome 
    Explanation
    Chromosomes are the structures responsible for the transfer of characteristics from parents to offspring. They contain the genetic material, DNA, which carries the instructions for the development and functioning of an organism. During reproduction, chromosomes are passed from the parents to their offspring, ensuring the inheritance of traits and characteristics. Therefore, the correct answer is Chromosome.

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  • 9. 

    The testes of the human male correspond to the anther of flowers because they 

    • Are separate organs 

    • Have similar shape 

    • Produce male sex cell 

    • Have tube leading from them 

    Correct Answer
    A. Produce male sex cell 
    Explanation
    The testes of the human male correspond to the anther of flowers because they both produce male sex cells. The testes produce sperm cells, which are the male sex cells, while the anther produces pollen, which contains the male sex cells in plants. This similarity in function is why the testes and anther can be compared to each other.

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  • 10. 

    The names of three types of blood vessels found in the human circulatory system are artery, veins and 

    • Valves 

    • Tubules 

    • Capillaries 

    • Bronchioles 

    Correct Answer
    A. Capillaries 
    Explanation
    Capillaries are tiny, thin-walled blood vessels that connect arteries and veins. They are responsible for the exchange of oxygen, nutrients, and waste products between the blood and the surrounding tissues. Capillaries have a large surface area and are located close to the cells, allowing for efficient exchange of substances. Unlike arteries and veins, which have thicker walls and carry blood away from and towards the heart respectively, capillaries are narrow and have one-cell-thick walls to facilitate the exchange of substances. Therefore, capillaries are one of the three types of blood vessels found in the human circulatory system.

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  • 11. 

    Wet clothes are most likely to dry quickly under conditions of 

    • High temperature and low humidity 

    • High temperature and high humidity 

    • Low temperature and low humidity 

    • Low temperature and high humidity 

    Correct Answer
    A. High temperature and low humidity 
    Explanation
    Wet clothes are most likely to dry quickly under conditions of high temperature and low humidity because high temperature increases the rate of evaporation, causing the water in the clothes to evaporate faster. Low humidity means that the air has less moisture, allowing the water vapor from the wet clothes to be absorbed more easily, further aiding the drying process.

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  • 12. 

    The amount of water entering the tissues of the body is controlled by 

    • Egestion 

    • Nutrition 

    • Excretion 

    • Osmoregulation 

    Correct Answer
    A. Osmoregulation 
    Explanation
    Osmoregulation is the process by which organisms maintain the balance of water and solutes in their bodies. It involves controlling the amount of water that enters and leaves the tissues of the body. This is achieved through various mechanisms such as osmosis, filtration, and reabsorption in different parts of the body, such as the kidneys in humans. Osmoregulation helps to regulate the concentration of solutes in the body and ensure that cells and tissues function properly.

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  • 13. 

    Which of the following shape describe molar teeth

    • Pointed 

    • Rounded 

    • Flat topped 

    • Chisel-shaped 

    Correct Answer
    A. Flat topped 
    Explanation
    Molar teeth are typically flat topped. This means that the biting surface of the tooth is relatively flat, allowing for effective grinding and chewing of food. The flat top helps to break down food into smaller pieces, making it easier to digest. Molars are located at the back of the mouth and are larger and stronger than other teeth, making them well-suited for this grinding function.

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  • 14. 

    The structure label X is the 

    • Nucleus 

    • Vacuole 

    • Cell wall 

    • Chloroplast 

    Correct Answer
    A. Nucleus 
    Explanation
    The correct answer is Nucleus. The question is asking for the structure label X, and the correct answer is the Nucleus.

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  • 15. 

    Which of the following is the method of heat transfer that occurs in fluids 

    • Radiation 

    • Convection 

    • Conduction 

    • Evaporation 

    Correct Answer
    A. Convection 
    Explanation
    Convection is the method of heat transfer that occurs in fluids. It involves the transfer of heat through the movement of the fluid itself. In convection, heat is transferred from one place to another by the movement of hot fluid particles, such as air or water. This movement creates currents that carry the heat energy. Convection is commonly observed in everyday life, such as the rising of hot air or the circulation of hot water in a pot.

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  • 16. 

    Which of the following processes is primarily responsible for the genetic variation observed in sexually reproducing organisms?

    • Mitosis

    • Binary fission

    • Meiosis

    • Budding

    Correct Answer
    A. Meiosis
    Explanation
    Meiosis is the process of cell division that reduces the chromosome number by half, creating four haploid cells. This process involves recombination and independent assortment of chromosomes, which leads to genetic variation in the gametes. Mitosis is responsible for cell growth and repair, binary fission is a form of asexual reproduction in prokaryotes, and budding is another form of asexual reproduction found in some organisms.

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  • 17. 

    In which test tube is germination most likely to take place? 

    • I

    • II

    • III

    • IV

    Correct Answer
    A. II
    Explanation
    Germination is most likely to take place in test tube II. This can be inferred because germination requires favorable conditions such as moisture, oxygen, and suitable temperature. Test tube II is the only option that provides these conditions, as it is the only test tube mentioned. Therefore, it is reasonable to conclude that germination is most likely to occur in test tube II.

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  • 18. 

    In which of the following processes is glucose converted into carbon dioxide, water and energy 

    • Digestion

    • Excretion 

    • Respiration 

    • Fermentation 

    Correct Answer
    A. Respiration 
    Explanation
    Respiration is the correct answer because it is the process by which glucose is broken down in the presence of oxygen to produce carbon dioxide, water, and energy. This process occurs in the cells of living organisms and is essential for the release of energy needed for various biological functions. Digestion is the process of breaking down food into smaller molecules, excretion is the elimination of waste products, and fermentation is an anaerobic process that produces energy without the presence of oxygen.

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  • 19. 

    Which of the following air pollutants combines with the haemoglobin in the red blood cell? 

    • Carbon dioxide 

    • Nitrogen Dioxide 

    • Sulphur Dioxide 

    • Carbon Monoxide 

    Correct Answer
    A. Carbon Monoxide 
    Explanation
    Carbon monoxide combines with the haemoglobin in the red blood cell. This is because carbon monoxide has a strong affinity for haemoglobin, binding to it more readily than oxygen. When carbon monoxide binds to haemoglobin, it forms carboxyhemoglobin, which prevents oxygen from binding to haemoglobin and reduces the oxygen-carrying capacity of the blood. This can lead to a decrease in oxygen supply to the body's tissues and organs, causing symptoms such as headache, dizziness, and shortness of breath.

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  • 20. 

    During which of the above process is excretion occurring

    • I

    • II

    • III

    • IV

    Correct Answer
    A. III
    Explanation
    Excretion is the process of eliminating waste products from the body. In the given question, there are four processes mentioned, but only process III is where excretion is occurring. Without any further information about the processes, it can be assumed that process III involves the elimination of waste products from the body, making it the correct answer.

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  • 21. 

    The structure label T is the 

    • Nucleus 

    • Vacuole 

    • Cell wall 

    • Chloroplast

    Correct Answer
    A. Cell wall 
    Explanation
    The correct answer is "Cell wall". The cell wall is a rigid structure that surrounds the cell membrane in plant cells. It provides support and protection to the cell, helping to maintain its shape and prevent it from bursting under pressure. The cell wall is made up of cellulose and other polysaccharides, and it also contains proteins and other molecules that contribute to its strength and functionality.

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  • 22. 

    Which of the following methods  of birth control is most likely to require an accurate prediction of the ovulation period ? 

    • Rhythm 

    • Barrier 

    • Surgical 

    • Hormonal 

    Correct Answer
    A. Rhythm 
    Explanation
    Rhythm method of birth control is most likely to require an accurate prediction of the ovulation period. This method involves tracking a woman's menstrual cycle and avoiding intercourse during her fertile days. In order to effectively use this method, it is crucial to accurately predict when ovulation occurs. This can be done by monitoring changes in basal body temperature, cervical mucus, and/or using ovulation prediction kits. By avoiding intercourse during the fertile period, the chances of pregnancy can be reduced.

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  • 23. 

    Which structure is responsible for carrying impulses to the brain ?

    • (A)

    • (B)

    • (C)

    • (D)

    Correct Answer
    A. (C)
    Explanation
    Structure (C) is responsible for carrying impulses to the brain.

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  • 24. 

    Which of the following worded equation correctly summarises  the process of Photosynthesis 

    • (A)

    • (B)

    • (C)

    • (D)

    Correct Answer
    A. (D)

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  • Current Version
  • Jan 10, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 29, 2020
    Quiz Created by
    Gervent Gayle
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