Biology 0610/12 February/March 2024: question paper and mark scheme

Question

What is a characteristic of all living organisms? A breathing B egestion C excretion D ingestion

Question

The diagram shows a flowering plant. A key can be used to identify the plant. Which letter in the key identifies the flowering plant shown in the diagram? plant flower has four petals flower has five petals leaves with leaves with leaves with leaves with smooth edges jagged edges smooth edges jagged edges A B C D

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The drawing shows a ground squirrel. Which feature identifies this animal as a mammal? A eye B four limbs C fur D tail

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The diagram shows different types of cell. Which structure do all these cells have? A cell membrane B cell wall C chloroplast D nucleus

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The drawing of the insect shown has a magnification of ×5. The scale shown is in mm. 0 20 40 60 80 100 120 10 30 50 70 90 110 130 What is the actual size of the insect? A 25 mm B 120 mm C 130 mm D 625 mm

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Which factor would increase the rate of diffusion of oxygen molecules out of a photosynthesising leaf? A decreasing the concentration gradient B decreasing the distance over which diffusion occurs C decreasing the surface area of the leaf D decreasing the temperature

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Which process only involves the movement of water through the partially permeable membrane of a cell? A absorption B evaporation C osmosis D transpiration

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Which statement about active transport is correct? A It does not require a cell membrane. B It does not require energy from respiration. C It moves particles from a lower concentration to a higher concentration. D It moves water into and out of cells.

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DCPIP can be used to test for vitamin C in food. Lemon juice contains vitamin C. When lemon juice is tested with DCPIP what are the results? A starts blue, finishes colourless B starts colourless, finishes blue C stays blue D stays colourless

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Which reagent is used to test for the presence of protein in food? A Benedict’s solution B biuret solution C ethanol D iodine solution

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The graph shows the effect of pH on the rate of reaction of an enzyme. rate of reaction 3 4 5 6 7 8 9 pH What does the graph show? A The enzyme is destroyed at pH 9. B The enzyme works best at pH 6. C The rate of reaction halves as the pH changes from pH 5 to pH 7. D The rate of reaction is the same at pH 5 and pH 8.5.

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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

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Some variegated leaves have white parts and green parts. A plant with variegated leaves has the starch removed from its leaves by placing it in a dark cupboard for 48 hours. Black paper is then fixed on one leaf as shown and the plant is exposed to light. After 24 hours, which part of the leaf contains starch? green region white region D A B C black paper on both sides of leaf

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The diagram shows a plant cell. cell membrane vacuole nucleus cell wall cytoplasm chloroplast Which type of cell is shown? A cuticle cell B epidermal cell C palisade mesophyll cell D spongy mesophyll cell

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The pie charts show the composition of 100 g of four different foods. Which food provides the most energy? A B C D key carbohydrate fats and oils protein water

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The diagram shows the digestive system and some of its associated organs. Which label identifies the liver? B A C D

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Which statements about teeth are correct? 1 Canine teeth are for chewing and grinding food. 2 Incisor teeth are for biting and cutting food. 3 Premolar teeth are for chewing and grinding food. A 1, 2 and 3 B 2 and 3 only C 1 only D 2 only

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What is the definition of chemical digestion? A Large insoluble molecules are changed into smaller soluble molecules. B Large soluble molecules are changed into smaller soluble molecules. C Small insoluble molecules and ions are passed through the wall of the small intestine. D Small soluble molecules and ions are passed through the wall of the small intestine.

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In which part of the alimentary canal does hydrochloric acid provide an acid pH for enzymes? A colon B duodenum C ileum D stomach

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Which tissue has the function of providing support for a plant? A epidermis B mesophyll C phloem D xylem

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Which graph shows the effect of increasing wind speed on the rate of transpiration? A B rate of rate of transpiration transpiration wind speed wind speed C D rate of rate of transpiration transpiration wind speed wind speed

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What ensures one-way flow of blood in the circulatory system? A atria B septum C valves D ventricles

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The diagrams show sections through three blood vessels, which are not drawn to the same scale. Some red blood cells are shown in vessel 3. 1 2 3 In which order will red blood cells flow through these vessels when travelling from the right ventricle to the left atrium of the heart? A 1→2→3 B 1→3→2 C 2→3→1 D 3→1→2

Question

Scientists used an ECG trace to monitor the heart of a student at rest and during exercise. ECG trace at rest 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 0.2 0.6 1.0 1.4 1.8 2.2 2.6 time / s ECG trace during exercise 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 0.2 0.6 1.0 1.4 1.8 2.2 2.6 time / s What is the explanation for the difference in the ECG traces? A During exercise the heart rate increases to transport more oxygen to muscles. B During exercise the heart rate increases to breathe in more oxygen. C During exercise the breathing rate increases to supply more oxygen to muscles. D During exercise the breathing rate increases to breathe in more oxygen.

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Statements about pathogens are given. 1 A pathogen is a disease-causing organism. 2 All pathogens are bacteria. 3 A pathogen can be transmitted by indirect contact through contaminated food. Which statements are correct? A 1 and 2 B 1 and 3 C 1 only D 3 only

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Which structure in the breathing system has the thinnest wall? A alveolus B bronchiole C bronchus D trachea

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What are the products of aerobic respiration? A carbon dioxide and lactic acid B carbon dioxide and water C carbon dioxide only D lactic acid and water

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What are the products of anaerobic respiration in yeast? carbon alcohol lactic acid dioxide A yes yes no B yes no yes C no yes no D no no yes

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Some excretory products are listed. 1 carbon dioxide 2 excess ions 3 excess water 4 urea Which products are excreted by the kidneys? A 1, 2 and 3 B 2, 3 and 4 C 1 and 2 only D 3 and 4 only

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A person touches a sharp object. The person immediately pulls their hand away. Which row shows the correct description of the term? term description A effector pulling the hand away B receptor muscles in the arm C response sensory neurones in the skin D stimulus sharp object touching the skin

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Which structure focuses light on the retina? A cornea B iris C lens D optic nerve

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Which statements describe adrenaline and its effects on the human body? 1 Pupil diameter becomes smaller. 2 Breathing rate decreases. 3 Heart rate increases. 4 Adrenaline is transported in the blood. A 1, 3 and 4 B 2, 3 and 4 C 1 and 2 D 3 and 4 only

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Which statements about drugs are correct? 1 Drugs affect or modify chemical reactions in the body. 2 Drugs called antibiotics can be used to kill bacteria. 3 Drugs called antibiotics can be used to kill viruses. A 1 and 2 B 2 and 3 C 1 only D 2 only

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At which point in the diagram does fertilisation happen? A D C B

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The seed shape of peas can be smooth or wrinkled. The allele for smooth is dominant and the allele for wrinkled is recessive. Two heterozygous plants are crossed. What is the expected percentage of offspring with a smooth shape? A 0% B 50% C 75% D 100%

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Which human phenotype is caused by genes only? A ABO blood group B body mass C foot size D height

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What is a correct ecological definition? A A community is a group of organisms of one species living in the same area. B An ecosystem is a community of organisms and their environment interacting together. C A population is a group of different species living together. D A species is all of the different organisms living in a community.

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Which action will decrease the population of an endangered animal species in a habitat? A a ban on hunting this species B building homes for people in this area C educating people about this species D using captive breeding programmes to release animals of this species into the habitat

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Which row shows two reasons why bacteria are used in genetic modification? can make complex rate of reproduction molecules A no slow B yes slow C no rapid D yes rapid

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Which row shows uses of genetic modification? producing human producing crops producing proteins that are resistant to herbicide-resistant insect pests crops A no no yes B no yes no C yes no no D yes yes yes