Biology 0610/12 May/June 2019: question paper and mark scheme

Question

Carbon dioxide diffuses into a leaf. Which characteristic of living things requires this? A excretion B movement C nutrition D respiration

Question

The diagram shows how Homo sapiens (modern people) could have evolved from earlier ancestors. Homo sapiens (modern people) Homo heidelbergensis Homo erectus Homo habilis Which statement about modern people and their ancestors is correct? A They are in the same species and the same genus. B They are in the same species but not the same genus. C They are in the same genus but not the same species. D They are neither the same species nor the same genus.

Question

The diagram shows an animal. Using the key, what is the animal? 1 has three pairs of legs …… go to 2 has four pairs of legs …… go to 3 2 has wings …… A has no wings …… B 3 large claws (pedipalps) …… C no large claws (pedipalps) …… D

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Which features are possessed by all plant cells? a cell wall chloroplasts A key B = present C = absent D

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Which group of organs belongs to the same organ system? A diaphragm, oesophagus, trachea B heart, liver, lungs C heart, stomach, trachea D oesophagus, intestine, stomach

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The diagram shows a test-tube containing clear jelly. A drop of blue ink is injected into the middle of the jelly. clear jelly drop of blue ink The blue colour of the ink spreads throughout the jelly. By which process does the blue ink spread through the jelly? A active transport B catalysis C diffusion D osmosis

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Which process describes osmosis? A diffusion of water through a cell wall B diffusion of water through a partially permeable membrane C diffusion of water through the cell sap D diffusion of water through the cytoplasm

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Which row shows the chemical elements contained in fats? carbon hydrogen nitrogen oxygen A key B = present C = absent D

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Small molecules are used as the basic units in the synthesis of large food molecules. Which statement is correct? A Amino acids are basic units of carbohydrates. B Fatty acids are basic units of glycogen. C Glycerol is a basic unit of oils. D Simple sugar is a basic unit of protein.

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Which graph shows the effect of pH on enzyme activity? A B enzyme enzyme activity activity 1 7 14 1 7 14 pH pH C D enzyme enzyme activity activity 1 7 14 1 7 14 pH pH

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The diagram shows an experiment to investigate the balance between respiration and photosynthesis. In which tube are photosynthesis and respiration taking place at the same time? A B C D black water polythene to keep snail out light light light light pond weed

Question

The diagram shows how sewage is treated. air out second settling aeration screen settling water to river tank tank tank sludge air in sludge sludge sludge disposal digester Why is air bubbled through the aeration tank? A to encourage microorganisms to reproduce quickly B to float the sludge C to settle the sludge D to stop microorganisms from reproducing too quickly

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

Digested food molecules move into the cells of the body where they are used and become part of the cells. What is this a definition of? A absorption B assimilation C digestion D ingestion

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The diagram shows a human tooth with an area of decay. area of decay What is likely to have caused the decay? A acids released by bacteria B digestion of the tooth by bacteria C excess of fat in the food D lack of fibre in the food

Question

A celery stalk was placed into a beaker of blue dye. When the dye reached the leaves, the stalk was taken out and a section was cut, as shown in the diagram. celery stalk cut blue dye Which diagram shows the appearance of the cut end of the stalk? A B C D blue dye blue dye blue dye

Question

The table shows the rate of water flow through a tree over a 12 hour period. rate of flow time of day / cm per hour 17:00 100 19:00 120 11:00 140 13:00 250 15:00 300 17:00 260 19:00 180 What conclusion can be drawn from the table? A Between 7:00 and 17:00 hours the rate of flow continuously increases. B The greatest increase in rate of flow in a two-hour period is between 11:00 and 13:00 hours. C Water does not flow up through a tree at night. D Water flow is affected by humidity.

Question

How does the transport system of a human differ from the transport system of a tree? human tree A carries mineral ions does not carry mineral ions B must carry oxygen does not need to carry oxygen C does not transport cells transports cells D vessels no vessels

Question

The diagram shows cross-sections through three types of blood vessel, not drawn to the same scale. V W X Which section is from a vein and which is from a capillary? vein capillary A V W B W V C W X D X W

Question

Which disease is transmissible? A cholera B coronary heart disease C lung cancer D scurvy

Question

What is the approximate percentage of oxygen in expired air? A 0.04% B 4% C 16% D 21%

Question

Which pathway is followed by air passing into the body? A larynx → trachea → bronchi → bronchioles → alveoli B larynx → trachea → bronchioles → bronchi → alveoli C trachea → larynx → bronchi → alveoli → bronchioles D trachea → larynx → bronchi → bronchioles → alveoli

Question

The diagram shows two experiments investigating gas exchange in small aerobic crustaceans. Soda lime absorbs carbon dioxide. P Q coloured coloured liquid marker liquid marker small aerobic crustaceans wire gauze soda lime glass beads instead of soda lime Which way does the liquid marker move? P Q A left right B left stays still C right left D right stays still

Question

Yeast is placed inside a container full of a glucose solution with no air. Which word equation summarises the process that takes place inside the container? A glucose → ethanol + carbon dioxide B glucose → lactic acid C glucose + oxygen → carbon dioxide + water D glucose + oxygen → ethanol

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Where is urea formed and excreted? formed excreted A bladder heart B heart liver C kidney bladder D liver kidney

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Which structure is an effector? A adrenal gland B motor neurone C optic nerve D spinal cord

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When we get hot and the temperature of our blood rises, one of the ways we can cool down is by sweating. What detects the rise in temperature of the blood? A skin B sweat glands C hair erector muscles D brain

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A person suffering from influenza was given antibiotics. Influenza is caused by a virus. Why did the antibiotics not cure the person with influenza? A Antibiotics do not affect viruses. B The antibiotic course was not long enough. C The influenza virus became resistant to the antibiotics. D The person was immune to antibiotics.

Question

Which parts of the gametes fuse during fertilisation? A cell membranes B cell walls C cytoplasm D nuclei

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Which environmental conditions must be present for germination? A carbon dioxide and water B light and suitable temperature C oxygen and carbon dioxide D water and oxygen

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What happens to the lining of the human uterus in the days before the release of an egg cell? A breaks down B lost from body C thickens D thins

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Which word describes an individual who has two identical alleles for a particular gene? A dominant B heterozygous C homozygous D phenotype

Question

One type of night-blindness is an inherited condition, caused by a dominant allele. The chart shows how this condition was passed on in one family. key normal female normal male male with X night-blindness Person X marries someone with normal sight. What is the chance that their first child will have night-blindness? A 0% B 25% C 50% D 75%

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The diagram shows the percentage of tongue rollers and non-rollers in a human population. percentage of population rollers non-rollers tongue rolling ability Which word describes this type of variation? A adaptive B continuous C discontinuous D environmental

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The diagram shows the average head and ear shapes of rabbits from four different regions. Which is best adapted to living in the coldest region? A B C D

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The food chain shows how energy is transferred to a human. lettuce → snails → duck → human Where did the energy in the lettuce come from? A snails B soil C Sun D water

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Which process forms part of the carbon cycle? A condensation B fossilisation C precipitation D transpiration

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Which statement correctly explains why bacteria are used in biotechnology? A Bacteria reproduce slowly. B Bacteria need complex molecules. C Bacteria can make complex molecules. D Bacteria are all pathogens.

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Which enzyme is used in fruit juice production to make the juice clear? A amylase B pectinase C protease D lipase

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What is not a reason for using chemical fertilisers in food production? A improving growth rate B improving mineral content of the soil C increasing yields D reducing competition with weeds