IGCSE 2021 Biology 0610/22 Feb/Mar

IGCSE 2021 0610/22 Feb/Mar Question Paper (pdf)

IGCSE 2021 0610/22 Feb/Mar Mark Scheme (pdf)

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1. Woodlice are small organisms that live in damp places.
   In an experiment, three live woodlice are put into a glass container. The diagram shows what happens after 30 minutes.
   Which characteristic of living organisms is shown by this experiment?
   A growth
   B nutrition
   C respiration
   D sensitivity
2. Which species can breed with Prunella vulgaris to produce fertile offspring?
3. What is the correct order of arthropod groups, from those with the most legs to those with the fewest legs?
4. The diagram shows four animal cells, as seen under a light microscope.
   What will be present at X?
   A one cell membrane
   B one cell wall
   C two cell membranes
   D two cell walls
5. The diagram shows a root hair cell.
   How is this cell modified for the absorption of water?
   A It has a cellulose cell wall.
   B It has a thin layer of cytoplasm.
   C It has a large surface area.
   D It has a large vacuole
6. A student draws a diagram of a mitochondrion.
   The diagram has a magnification of ×20 000.
   The diagram is 5 cm long.
   What is the actual size of the mitochondrion?
7. A jar of air was placed upside down on top of a jar containing a brown gas as shown.
   Which process has taken place?
   A diffusion both upwards and downwards
   B diffusion downwards only
   C diffusion upwards only
   D diffusion and osmosis
8. Which row describes active transport?
9. The bases on one strand of a DNA molecule have the sequence CAGCT.
   What is the sequence of bases on the other strand?
10. The graph shows the effect of temperature on the rate of an enzyme-controlled reaction.

11. Which graph represents the effect of pH on the activity of a digestive enzyme?
12. In which process is oxygen a waste product?
    A active transport
    B aerobic respiration
    C anaerobic respiration
    D photosynthesis
13. Which layer in the leaf contains interconnecting air spaces?
14. Where does egestion take place?
15. The diagram shows a fat globule (P) in one part of the alimentary canal and the same fat globule (Q) as it appears in another part of the alimentary canal
16. The diagram shows enzymes and the products of the reactions they catalyse.
17. Which statement about a function of xylem tissue is correct?
    A It carries glucose from the roots to the leaves.
    B It helps to support stems and leaves.
    C It is the only transport tissue in the plant.
    D It carries water away from the leaves.
18. What is part of the definition of transpiration?
    A the loss of water vapour from plant leaves by evaporation of water at the surfaces of the mesophyll cells
    B the movement of molecules into the cells of the organism where they are used
    C the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration
    D the transport of mineral ions from the roots into the stem and leaves
19. The diagram shows the circulation of blood in an organism.
20. The photomicrograph shows human blood.
    Which blood component can carry out the process of phagocytosis?
21. Which diagram shows how a vaccination can lead to long-term immunity?
22. Air entering human lungs contains approximately 21% oxygen and 0.04% carbon dioxide.
    Which row shows the concentrations of these gases in air leaving the lungs?
23. After running a fast race a student had pains in their leg muscles.
    The pain was caused by the build-up of a product of anaerobic respiration.
    Which product caused the pain?
    A carbon dioxide
    B ethanol
    C lactic acid
    D water
24. The diagram shows the production and excretion of materials from the human body.
25. What is a function of a synapse?
    A to allow impulses to travel in both directions
    B to ensure impulses travel in one direction
    C to release vesicles into the synaptic gap
    D to transport neurotransmitters by osmosis
26. Hormones and the nervous system both control our bodies.
    Which statement about the control provided by our hormones is correct?
    A fast response and long lasting
    B fast response and short lived
    C slow response and long lasting
    D slow response and short lived
27. Auxin is a chemical produced by plants. It controls plant growth.
    Which statement about auxin is correct?
    A Auxin affects the cells only where it is made.
    B Auxin is equally distributed in response to light from one direction.
    C Auxin elongates the cells in the shoot tip.
    D Auxin is made in the shoot tip.
28. How do some antibiotics kill bacteria?
    A They damage the cell wall.
    B They damage the endoplasmic reticulum.
    C They damage the nucleus.
    D They damage the protein coat.
29. Some statements about asexual reproduction are listed.
    1 Offspring are genetically identical.
    2 Offspring are genetically different.
    3 Only one parent is required.
    4 Two parents are required.
    Which statements are correct?
    
30. Which types of contact between humans can spread HIV?
    
31. Which method of birth control works by preventing an egg from being released?
    
32. What is defined as ‘a thread-like structure of DNA, carrying genetic information in the form of genes’?
33. The statements describe steps in protein synthesis.
34. A sunflower has 17 chromosomes in each pollen nucleus. These nuclei are produced by the process of ……1…… in the anthers. They are genetically ……2…… all the pollen nuclei produced by those anthers. After fertilisation the resulting zygote will have ……3…… chromosomes.
    Which row correctly completes gaps 1, 2 and 3?
35. A man heterozygous for the sickle cell anaemia allele, HbSHbA, has children with a woman who is homozygous for the normal haemoglobin allele, HbAHbA.
    What is the probability that the first child will be resistant to malaria?
36. Which leaf feature is an adaptation of xerophytes to their environment?
    A hairs surrounding stomata
    B large internal hollow spaces
    C large numbers of stomata
    D thin cuticle on both surfaces
37. The graph shows the change in population of an organism over time in an ecosystem.
38. The diagram shows the structure of a bacterium
39. When nitrates enter a lake they cause rapid growth of algae on the surface of the water. This causes the following changes in the lake:
40. The action of which type of bacteria would cause soil to be lacking in nitrates?
    A aerobic
    B denitrifying
    C nitrifying
    D nitrogen fixing

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