Biology 0610/12 May/June 2023: question paper and mark scheme

Question

Living animals release carbon dioxide. This is an example of which life process? A excretion B movement C nutrition D sensitivity

Question

Some statements about species are given. 1 Members of a species all look identical. 2 Members of a species belong to the same genus. 3 Members of a species can produce fertile offspring. 4 Species are named using an international system. Which statements are correct? A 1, 2, 3 and 4 B 1, 2 and 3 only C 2 and 4 only D 2, 3 and 4 only

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The table shows some features of different animals. Which animal is a reptile? wings hair scales A B C D

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Which structures are found in the cells of all living organisms? 1 cell membrane 2 chloroplast 3 cytoplasm A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

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A diagram of a human red blood cell is shown. The length of line XY on the diagram is 40 mm. The actual width of the cell is 0.008 mm. X Y What is the magnification of the diagram? A ×500 B ×5000 C ×50 000 D ×500 000

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Which statements are correct for both diffusion and osmosis? involves molecules move from requires energy movement of higher concentration to from respiration water only lower concentration A key B = yes C = no D

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What is a role of water in digestion? A It is an enzyme. B It is a solvent. C It is soluble. D It is a mineral.

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The concentration of sodium ions in the soil is lower than the concentration inside root hair cells. Which process will be used when sodium ions are taken into root hair cells from the soil? A active transport B diffusion C osmosis D transpiration

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The diagram represents a protein molecule. What do the small circles represent? A amino acids B fatty acids C glycerol D simple sugars

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Which processes depend on the action of enzymes? 1 digestion 2 osmosis 3 respiration A 1 and 2 B 1 and 3 C 1 only D 2 and 3

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Which diagram of an enzyme, active site and substrate is correct? A B substrate enzyme enzyme active site active site substrate C D substrate enzyme enzyme active site active site substrate

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Four test-tubes are set up as shown. Which test-tube contains the least carbon dioxide after one hour? A B C D black water polythene to keep aquatic out light animal light light light aquatic plant

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Which row shows the uses of some carbohydrates in plants? glucose starch sucrose A cell walls transport energy storage B energy storage cell walls respiration C respiration energy storage transport D transport respiration cell walls

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The lack of which component of a balanced diet will lead to the development of scurvy? A calcium B iron C vitamin C D vitamin D

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Which structure is the duodenum? D A C B

Question

The food label is from a packet of cereal. The label can help someone who is concerned about their diet. Nutrition Typical values 100 g contains Energy 985 kJ 235 kcal Fat 1.5 g of which saturates 0.3 g Carbohydrate 45.5 g of which sugars 3.8 g Fibre 2.8 g Protein 7.7 g Salt 0.5 g A person eats 45 g of cereal. One of the food types listed in the label can help prevent constipation. How many grams of this food type does the person eat? A 1.3 g B 2.8 g C 3.5 g D 7.7 g

Question

Which pathway is taken by water through a plant? A root hair → root cortex → xylem → mesophyll → stomata B root hair → xylem → mesophyll → root cortex → stomata C stomata → root cortex → xylem → mesophyll → root hair D stomata → root hair → root cortex → xylem → mesophyll

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Which row shows the transpiration rate for the conditions described? atmospheric transpiration wind speed temperature rate A low low fast B high high slow C low high slow D low low slow

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The diagram shows the human heart. Which label shows the left ventricle? D A B C

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Which row shows the features of an artery or a vein? diameter thickness blood vessel of lumen of wall A artery large thick B artery small thin C vein large thin D vein small thick

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What are features of gas exchange surfaces in animals? A thick-walled and large surface area B thick-walled and small surface area C thin-walled and small surface area D thin-walled and large surface area

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Which chemical can be used to show the presence of carbon dioxide gas? A Benedict’s solution B biuret solution C ethanol D limewater

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The diagram represents the exchange of gases during breathing and during respiration in the body. oxygen oxygen in blood X Y carbon carbon dioxide dioxide in blood What is represented by X? A heart B kidneys C liver D lungs

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Which molecule is produced by anaerobic respiration in yeast? A carbon dioxide B lactic acid C oxygen D water

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The diagram shows the human body and some of its organs. Which structure removes urea from the blood? A B C D

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The diagram shows the structures in a reflex arc. X receptor muscle What is X? A effector B relay neurone C sensory neurone D synapse

Question

Changes in light intensity cause changes in the diameter of the pupil in the eye. Which rows show the pupil reflex? light intensity pupil diameter 1 high increases 2 high decreases 3 low increases 4 low decreases A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

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A hormone is injected into a person to reduce their blood glucose concentration. Which endocrine gland is not functioning properly in a person who needs to have this injection? A adrenal gland B ovary C pancreas D testis

Question

The table shows which antibiotics are effective against different types of bacteria. The shaded areas show the antibiotic is effective against that type of bacteria. type of bacteria antibiotic MRSA Streptococcus Pseudomonas Anaerobes 1 2 3 4 5 6 A person has a disease caused by a type of Streptococcus bacteria and a second infection caused by a type of Pseudomonas bacteria. Which antibiotic should be taken? A 1 or 6 B 2 or 4 C 3 or 4 D 5 or 6

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The diagram shows one way that a plant can reproduce. What is a feature of this type of reproduction? A The offspring show genetic variation. B Only one parent is required. C Offspring are easily dispersed over a wide area. D Pollination by insects is required.

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Which human characteristics are inherited? blood eye language sex group colour A key B = inherited C = not inherited D

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In a sperm cell, which structure contains enzymes that can digest the jelly coat of an egg cell? A acrosome B flagellum C mitochondria D nucleus

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When breeding, which pair of parents will be pure-breeding for a particular characteristic? A a heterozygous and a homozygous individual B two heterozygous individuals C two homozygous individuals D two individuals with the same phenotype

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In a pea plant, the allele for round seeds, R, is dominant to the allele for wrinkled seeds, r. If plants with the genotype Rr are crossed, what are the likely proportions of offspring? A all with round seeds B all with wrinkled seeds C 1 with round seeds : 1 with wrinkled seeds D 3 with round seeds : 1 with wrinkled seeds

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Which definition of continuous variation is correct? A variation that results in a limited number of phenotypes between two extremes B variation that results in a limited number of phenotypes with no intermediates C variation that results in a range of phenotypes between two extremes D variation that results in a range of phenotypes with no intermediates

Question

Which term is used to describe an organism that makes its own organic nutrients? A carnivore B decomposer C herbivore D producer

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What is the principal source of energy for most food chains? A carbon dioxide gas B glucose C oxygen D sunlight

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A single tree is food for a large population of caterpillars. Several small birds eat the caterpillars. The small birds are eaten by a bird of prey. Which is the pyramid of biomass? A B C D

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The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory. direction of water flow mayfly nymph stonefly nymph factory emptying pollutants into the water rat-tailed maggot bloodworm sludge worm leech bloodworm water louse snail shrimp caddisfly larva mayfly nymph stonefly nymph Which animal lives in the least polluted water? A bloodworm B caddisfly larva C leech D stonefly nymph

Question

Bacteria are useful for manufacturing products for human use. Which statement explains why they are useful? A Bacteria can be grown without nutrients. B Bacteria do not have a nucleus. C Bacteria infect human cells. D Bacteria reproduce very rapidly.