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Biology

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Characteristics and Classification of Living Organisms

Subtopic

Characteristics and Classification of Living Organisms under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which part of a plant cell is made of cellulose and provides support?

    A.

    Cell membrane

    B.

    Cytoplasm

    C.

    Cell wall

    D.

    Vacuole

  2. 2.

    Which group of animals is homeothermic (warm-blooded)?

    A.

    Reptiles

    B.

    Fish

    C.

    Amphibians

    D.

    Birds

  3. 3.

    Which of the following is a characteristic of all living organisms?

    A.

    They all breathe oxygen through lungs

    B.

    They all move from place to place

    C.

    They all require nutrition

    D.

    They all have a heart

Download the worksheet for Biology - Characteristics and Classification of Living Organisms to practice offline. It includes additional chapter-level practice questions.

Organization of the Organism

Subtopic

Organization of the Organism under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following structures is unique to some plant cells and never found in any animal cells?

    A.

    Cytoplasm

    B.

    Mitochondria

    C.

    Chloroplasts

    D.

    Ribosomes

  2. 2.

    Which organ system is responsible for removing metabolic waste products from the blood?

    A.

    Nervous system

    B.

    Excretory system

    C.

    Skeletal system

    D.

    Digestive system

  3. 3.

    What is the standard unit of length used by biologists when measuring the diameter of a typical animal cell?

    A.

    Meter (m)

    B.

    Centimeter (cm)

    C.

    Micrometer (ΞΌm\mu m)

    D.

    Kilometer (km)

Download the worksheet for Biology - Organization of the Organism to practice offline. It includes additional chapter-level practice questions.

Movement in and out of Cells

Subtopic

Movement in and out of Cells under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which molecule can pass through a cell membrane by diffusion?

    A.

    DNA

    B.

    Starch

    C.

    Oxygen (O2O_2)

    D.

    Proteins

  2. 2.

    Diffusion is defined as the net movement of particles down a concentration gradient. What does 'down a concentration gradient' mean?

    A.

    From high to low concentration

    B.

    From low to high concentration

    C.

    Against gravity

    D.

    Towards the center of the cell

  3. 3.

    What is the term for the state of a plant cell when the cell membrane has pulled away from the cell wall due to water loss?

    A.

    Turgid

    B.

    Plasmolysed

    C.

    Isotonic

    D.

    Lysis

Download the worksheet for Biology - Movement in and out of Cells to practice offline. It includes additional chapter-level practice questions.

Biological Molecules

Subtopic

Biological Molecules under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of these is a product of the chemical breakdown of a lipid molecule?

    A.

    Amino acids

    B.

    Glucose

    C.

    Glycerol

    D.

    Starch

  2. 2.

    What is the main advantage of water having a high capacity to dissolve substances in the blood?

    A.

    It makes the blood turn red

    B.

    It allows nutrients and waste products to be transported easily

    C.

    It prevents the blood from clotting

    D.

    It keeps the body temperature at exactly 100Β°C

  3. 3.

    In humans, where is excess glucose stored when it is converted into glycogen?

    A.

    In the brain

    B.

    In the liver

    C.

    In the stomach

    D.

    In the lungs

Download the worksheet for Biology - Biological Molecules to practice offline. It includes additional chapter-level practice questions.

Enzymes

Subtopic

Enzymes under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Why is the shape of the active site important?

    A.

    It determines the color of the enzyme

    B.

    It allows the enzyme to move through the blood

    C.

    It must be complementary to the shape of the substrate

    D.

    It allows the enzyme to store energy

  2. 2.

    What type of reaction involves breaking down a large molecule into smaller ones using enzymes?

    A.

    Synthesis

    B.

    Digestion

    C.

    Respiration

    D.

    Photosynthesis

  3. 3.

    Which of these is most likely to happen to an enzyme if it is placed in an environment with a pH much higher than its optimum?

    A.

    It will work twice as fast

    B.

    It will change its substrate

    C.

    Its active site will change shape and lose function

    D.

    It will turn into an amino acid

Download the worksheet for Biology - Enzymes to practice offline. It includes additional chapter-level practice questions.

Plant Nutrition

Subtopic

Plant Nutrition under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the role of the air spaces in the spongy mesophyll?

    A.

    To provide buoyancy for the leaf

    B.

    To allow CO2CO_2 to diffuse to the palisade cells

    C.

    To store oxygen for respiration at night

    D.

    To act as a water reservoir

  2. 2.

    A student covers a small part of a leaf with black paper and leaves it in the sun. What will happen in the covered part after 24 hours?

    A.

    It will contain a lot of starch

    B.

    It will be blue-black with iodine

    C.

    It will contain no starch

    D.

    It will turn green

  3. 3.

    What is the function of the vascular bundle in a leaf?

    A.

    Protection from herbivores

    B.

    Gas exchange

    C.

    Transport and support

    D.

    Energy storage

Download the worksheet for Biology - Plant Nutrition to practice offline. It includes additional chapter-level practice questions.

Human Nutrition

Subtopic

Human Nutrition under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If a child has a diet very low in both energy and protein, they may suffer from which deficiency disease?

    A.

    Scurvy

    B.

    Marasmus

    C.

    Anemia

    D.

    Night blindness

  2. 2.

    What is the name of the first part of the small intestine that receives chyme from the stomach?

    A.

    Colon

    B.

    Ileum

    C.

    Duodenum

    D.

    Rectum

  3. 3.

    Which of the following is a primary source of vitamin C in the diet?

    A.

    Red meat

    B.

    Milk and cheese

    C.

    Citrus fruits

    D.

    White bread

Download the worksheet for Biology - Human Nutrition to practice offline. It includes additional chapter-level practice questions.

Transport in Plants

Subtopic

Transport in Plants under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which tissue in a plant is responsible for transporting amino acids?

    A.

    Xylem

    B.

    Phloem

    C.

    Cortex

    D.

    Pith

  2. 2.

    Which of these is a characteristic of xylem vessels?

    A.

    They are made of living cells

    B.

    They contain cytoplasm

    C.

    They have walls reinforced with lignin

    D.

    They transport sucrose and amino acids

  3. 3.

    What happens to the guard cells to cause a stoma to open?

    A.

    They lose water and become flaccid

    B.

    They gain water and become turgid

    C.

    They lose their nucleus

    D.

    They stop photosynthesizing

Download the worksheet for Biology - Transport in Plants to practice offline. It includes additional chapter-level practice questions.

Transport in Animals

Subtopic

Transport in Animals under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which chamber of the heart contracts to pump blood into the aorta?

    A.

    Right atrium

    B.

    Right ventricle

    C.

    Left atrium

    D.

    Left ventricle

  2. 2.

    Which of these is a function of blood plasma?

    A.

    Transporting heat around the body

    B.

    Carrying oxygen using hemoglobin

    C.

    Engulfing bacteria

    D.

    Pumping blood through the heart

  3. 3.

    What is the likely result of a blockage in a coronary artery?

    A.

    Increased lung capacity

    B.

    A heart attack

    C.

    Improved blood flow to the brain

    D.

    Healthier heart muscle

Download the worksheet for Biology - Transport in Animals to practice offline. It includes additional chapter-level practice questions.

Diseases and Immunity

Subtopic

Diseases and Immunity under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the function of the 'ciliary escalator' in the trachea?

    A.

    To pump blood

    B.

    To move trapped pathogens up to the throat

    C.

    To help swallow food

    D.

    To cool down the lungs

  2. 2.

    Why is a new flu vaccine produced every year?

    A.

    Because the old vaccine expires in one week

    B.

    Because the flu virus changes its surface antigens

    C.

    Because people forget they were vaccinated

    D.

    Because the government requires it

  3. 3.

    Which process describes a lymphocyte producing antibodies?

    A.

    Phagocytosis

    B.

    Active immunity

    C.

    Mechanical defense

    D.

    Passive transport

Download the worksheet for Biology - Diseases and Immunity to practice offline. It includes additional chapter-level practice questions.

Gas Exchange in Humans

Subtopic

Gas Exchange in Humans under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Why is the surface area of the lungs so large?

    A.

    To hold more water

    B.

    To speed up gas exchange by diffusion

    C.

    To make the lungs heavier

    D.

    To prevent air from leaving

  2. 2.

    Where is the concentration of oxygen the highest?

    A.

    In the blood in capillaries

    B.

    In the cells of the toe

    C.

    In the air inside the alveoli

    D.

    In the pulmonary artery

  3. 3.

    Which gas is used up during aerobic respiration in body cells?

    A.

    Nitrogen

    B.

    Carbon dioxide

    C.

    Oxygen

    D.

    Argon

Download the worksheet for Biology - Gas Exchange in Humans to practice offline. It includes additional chapter-level practice questions.

Respiration

Subtopic

Respiration under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In what two forms is energy primarily released during aerobic respiration?

    A.

    Light and sound

    B.

    ATP and heat

    C.

    Glucose and starch

    D.

    Oxygen and water

  2. 2.

    Which chemical can be used in an experiment to remove carbon dioxide from the air entering a container?

    A.

    Distilled water

    B.

    Soda lime

    C.

    Glucose solution

    D.

    Ethanol

  3. 3.

    What happens to the energy released during respiration that is not captured by the cell for biological work?

    A.

    It is destroyed

    B.

    It is converted into glucose

    C.

    It is lost to the environment as heat

    D.

    It is stored as oxygen

Download the worksheet for Biology - Respiration to practice offline. It includes additional chapter-level practice questions.

Excretion in Humans

Subtopic

Excretion in Humans under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which organ filters the blood to form urine?

    A.

    Liver

    B.

    Heart

    C.

    Kidney

    D.

    Bladder

  2. 2.

    Which of the following can be described as a waste product of metabolism?

    A.

    Fiber

    B.

    Water from respiration

    C.

    Inhaled argon

    D.

    Undigested fat

  3. 3.

    What is the name of the central cavity in the kidney where urine collects?

    A.

    Renal Pelvis

    B.

    Renal Cortex

    C.

    Renal Medulla

    D.

    Ureter

Download the worksheet for Biology - Excretion in Humans to practice offline. It includes additional chapter-level practice questions.

Coordination and Response

Subtopic

Coordination and Response under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which hormone is responsible for the 'fight or flight' response?

    A.

    Insulin

    B.

    Oestrogen

    C.

    Adrenaline

    D.

    Testosterone

  2. 2.

    What is the function of the iris?

    A.

    To focus light on the retina

    B.

    To control the size of the pupil

    C.

    To protect the cornea

    D.

    To convert light into electrical impulses

  3. 3.

    Which of these describes a sensory neuron?

    A.

    Connects relay neurons to muscles

    B.

    Carries impulses from receptors to the CNS

    C.

    Is found only in the brain

    D.

    Produces hormones like insulin

Download the worksheet for Biology - Coordination and Response to practice offline. It includes additional chapter-level practice questions.

Drugs

Subtopic

Drugs under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which disease is characterized by a persistent cough and excess mucus in the bronchi?

    A.

    Cirrhosis

    B.

    Chronic bronchitis

    C.

    Lung cancer

    D.

    Anemia

  2. 2.

    Why should you NOT use leftover antibiotics for a new infection?

    A.

    The antibiotics might have expired

    B.

    The new infection might be viral

    C.

    Using the wrong dose contributes to antibiotic resistance

    D.

    All of the above

  3. 3.

    Which of these is NOT a component found in tobacco smoke?

    A.

    Tar

    B.

    Glucose

    C.

    Nicotine

    D.

    Carbon monoxide

Download the worksheet for Biology - Drugs to practice offline. It includes additional chapter-level practice questions.

Reproduction

Subtopic

Reproduction under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of these is a waste product that moves from the fetus to the mother via the placenta?

    A.

    Oxygen

    B.

    Glucose

    C.

    Urea

    D.

    Amino acids

  2. 2.

    What is the name given to the offspring produced by asexual reproduction?

    A.

    Zygotes

    B.

    Clones

    C.

    Gametes

    D.

    Hybrids

  3. 3.

    Why do seeds need oxygen for germination?

    A.

    For photosynthesis

    B.

    For aerobic respiration

    C.

    To soften the seed coat

    D.

    To produce chlorophyll

Download the worksheet for Biology - Reproduction to practice offline. It includes additional chapter-level practice questions.

Inheritance

Subtopic

Inheritance under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The diagram shows a parent cell, PP, dividing by mitosis to produce two daughter cells, QQ and RR. If cell PP contains 4646 chromosomes, how many chromosomes will be found in cell QQ?

    A.

    2323

    B.

    4646

    C.

    9292

    D.

    4444

  2. 2.

    Which statement about variation is correct?

    A.

    All variation is caused by the environment.

    B.

    All variation is caused by genes.

    C.

    Variation can be continuous or discontinuous.

    D.

    Variation only occurs in animals, not plants.

  3. 3.

    How many alleles for a particular gene does a human gamete contain?

    A.

    1

    B.

    2

    C.

    23

    D.

    46

Download the worksheet for Biology - Inheritance to practice offline. It includes additional chapter-level practice questions.

Variation and Selection

Subtopic

Variation and Selection under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What happens during 'random fertilization'?

    A.

    Any sperm can fuse with any egg

    B.

    Only the largest egg is fertilized

    C.

    Mutations are removed from the DNA

    D.

    Genes are chosen by the parents

  2. 2.

    How does the use of antibiotics affect the population of bacteria?

    A.

    It causes all bacteria to die immediately

    B.

    It acts as a selection pressure, favoring resistant individuals

    C.

    It prevents bacteria from ever mutating

    D.

    It turns all bacteria into viruses

  3. 3.

    Which of the following is NOT a cause of genetic variation?

    A.

    Mutation

    B.

    Meiosis

    C.

    Random fertilization

    D.

    Eating more protein

Download the worksheet for Biology - Variation and Selection to practice offline. It includes additional chapter-level practice questions.

Organisms and their Environment

Subtopic

Organisms and their Environment under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Why is it disadvantageous to use persistent pesticides like DDT?

    A.

    They break down too quickly

    B.

    They can accumulate in the bodies of organisms higher up the food chain

    C.

    They only kill one specific type of insect

    D.

    They are very cheap to produce

  2. 2.

    Which of these is a common greenhouse gas?

    A.

    Nitrogen

    B.

    Methane

    C.

    Helium

    D.

    Argon

  3. 3.

    What is the definition of a 'habitat'?

    A.

    A group of different species

    B.

    The place where an organism lives

    C.

    The role of an organism in its environment

    D.

    A network of food chains

Download the worksheet for Biology - Organisms and their Environment to practice offline. It includes additional chapter-level practice questions.

Biotechnology and Genetic Engineering

Subtopic

Biotechnology and Genetic Engineering under Biology for Grade 10 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the typical optimal temperature for yeast fermentation in biotechnology?

    A.

    0∘C0^{\circ}C

    B.

    30∘C30^{\circ}C to 40∘C40^{\circ}C

    C.

    80∘C80^{\circ}C to 90∘C90^{\circ}C

    D.

    100∘C100^{\circ}C

  2. 2.

    In the large-scale production of penicillin, what is the 'batch' method?

    A.

    Ingredients are added and the product is harvested only at the end

    B.

    The fermenter is never cleaned

    C.

    Product is removed continuously as more food is added

    D.

    No microorganisms are used

  3. 3.

    What is the term for the circular piece of DNA found in bacteria that is often used in genetic engineering?

    A.

    Chromosome

    B.

    Nucleus

    C.

    Plasmid

    D.

    Chloroplast

Download the worksheet for Biology - Biotechnology and Genetic Engineering to practice offline. It includes additional chapter-level practice questions.

Biology - IGCSE Grade 10 Science Notes & Revision | Krit.club