Biology 0610/22 February/March 2020: question paper and mark scheme

Question

Which characteristic do all living organisms show? A breathing B excretion C photosynthesis D tropism

Question

Using the binomial naming system, the Arctic fox is called Vulpes lagopus. Which row is correct? Vulpes lagopus A genus kingdom B genus species C species genus D species kingdom

Question

What is a characteristic of both insects and arachnids? A eight legs B exoskeleton C three pairs of legs D wings

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What structures can be found in both plant and animal cells? A cell walls and cell membranes B nuclei and cell walls C cytoplasm and chloroplasts D cell membranes and nuclei

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The actual thickness of the leaf shown in the diagram is 2000 µm, but its thickness in the diagram is 50 mm. What is the magnification of the diagram? A ×0.025 B ×25 C ×100 D ×100 000

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What is the function of a root hair cell? A absorption B photosynthesis C reproduction D support

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Which row describes osmosis? energy from movement through a movement respiration partially permeable of water used membrane A key B = yes C = no D

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A student made the following statements about the movement of ions by active transport. 1 It is the net movement of particles from a low concentration to a high concentration. 2 It is the net movement of particles from a high concentration to a low concentration. 3 It requires the use of energy from respiration. 4 It can only take place in living cells. Which statements are correct? A 1, 3 and 4 B 1 and 4 only C 2 and 4 only D 2 only

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A test was performed on a food substance. A positive result was shown by a colour change to blue-black. What solution was used for the test? A biuret solution B DCPIP solution C iodine solution D Benedict’s solution

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The diagram shows an experiment on the digestion of the protein in egg albumen by protease. The protease was taken from a human stomach. In which test-tube will the protein be digested most quickly? A B C D water-bath at 37 °C egg albumen egg albumen egg albumen egg albumen + + + + protease dilute dilute dilute hydrochloric hydrochloric hydrochloric acid acid acid + + protease boiled protease

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The diagram represents enzyme action. + + W X Y What are parts W, X and Y in this chemical reaction? enzyme product substrate A W X Y B X W Y C X Y W D Y W X

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A student drew a diagram to show the substances used and produced in photosynthesis in a leaf. 1 + 2 are used by the leaf 3 + 4 are produced by the leaf Which row shows the correct labels for the diagram? 1 2 3 4 A carbon dioxide glucose oxygen water B water carbon dioxide glucose oxygen C oxygen water carbon dioxide glucose D glucose oxygen water carbon dioxide

Question

The diagram shows a type of plant cell. cytoplasm vacuole nucleus chloroplast In which tissue is this cell found? A leaf epidermis B palisade mesophyll C root epidermis D xylem

Question

The list shows some human health problems. 1 chronic obstructive pulmonary disease 2 constipation 3 coronary heart disease 4 obesity Which problems can be caused by malnutrition? A 1, 2 and 3 B 1 and 3 only C 2, 3 and 4 D 2 and 4 only

Question

Cholera infection can cause the following events: 1 cells lining the small intestine secrete chloride ions 2 cholera bacteria produce a toxin 3 chloride ions move into the small intestine 4 water from the blood moves into the small intestine by osmosis 5 water potential of fluid in the small intestine becomes lower. Which sequence of events will cause diarrhoea? A 1 → 3 → 2 → 4 → 5 B 2 → 1 → 3 → 5 → 4 C 3 → 1 → 4 → 5 → 2 D 2 → 3 → 1 → 4 → 5

Question

Which food group is chemically digested in the mouth, passes through the stomach and continues to be broken down by chemical digestion in the small intestine? A carbohydrates B mineral salts C proteins D vitamins

Question

When stems with white flowers are cut and placed in a blue stain the petals turn blue. Which tissue in the stem does the stain travel through to reach the petals? A epidermis B mesophyll C phloem D xylem

Question

Which process releases water vapour into the atmosphere from the leaves of trees? A active transport B osmosis C respiration D transpiration

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Mammals have a double circulation. Which shows the correct sequence for the movement of blood in a mammal? A body → heart → lungs → heart B body → lungs → body → heart C heart → lungs → body → heart D heart → body → lungs → heart

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The diagram shows a section through a blood vessel. P Q Which type of blood vessel is shown, and in which direction does the blood flow? type direction of vessel of flow A artery P to Q B artery Q to P C vein P to Q D vein Q to P

Question

The antibodies that give immunity to a disease can be acquired in the following different ways. 1 feeding on breast milk 2 infection by disease 3 vaccination Which give active immunity? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Question

During physical activity, what stimulates the brain to increase the breathing rate? A decreased oxygen concentration in the blood B decreased oxygen concentration in the lungs C increased carbon dioxide concentration in the blood D increased carbon dioxide concentration in the lungs

Question

The table shows some of the changes that occur during breathing. from contracted from relaxed to relaxed to contracted diaphragm P X external intercostal muscles Q Y internal intercostal muscles R Z Which changes occur to cause inspiration? A P, Q and Z B X, Q and R C X, Y and R D X, Y and Z

Question

How many molecules of ethanol are released from the anaerobic respiration of one molecule of glucose? A 1 B 2 C 4 D 6

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The diagram shows a kidney and its blood vessels. artery vein ureter In a healthy person, which structure(s) transport glucose? A artery only B artery and ureter C artery and vein D ureter and vein

Question

The diagram shows a synapse. Where are vesicles containing neurotransmitter molecules found? synaptic gap A B C D direction of impulse

Question

Which row shows the state of the ciliary muscles and suspensory ligaments, when the eye is focusing on a near object? ciliary suspensory muscles ligaments A contracted slack B contracted tense C relaxed slack D relaxed tense

Question

The diagram shows a shoot growing towards light. light Which statement about the role of auxin in phototropism is correct? A Auxin will move to the dark side of the shoot and cause cells to elongate. B Auxin will move to the dark side of the shoot and prevent cells from elongating. C Auxin will move to the light side of the shoot and cause cells to elongate. D Auxin will move to the light side of the shoot and prevent cells from elongating.

Question

Bacteria such as MRSA are resistant to several different antibiotics. Some suggested actions for reducing the development of antibiotic resistance in bacteria are listed. 1 Only use antibiotics when necessary. 2 Only use antibiotics on resistant bacteria. 3 Do not use antibiotics to treat viral infections. Which of the suggested actions are correct? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

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The diagram shows a sperm cell. Which part contains mitochondria to release energy for movement? A C D B

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What is a correct statement about lymphocytes? A Lymphocytes engulf pathogens. B Lymphocyte numbers can be reduced when a person is infected with HIV. C Lymphocytes produce antigens. D Lymphocytes transport oxygen to different parts of the body.

Question

The statements describe how a protein is made. 1 mRNA passes through a ribosome. 2 mRNA molecules carry a copy of the gene to the cytoplasm. 3 The gene coding for the protein is copied in the nucleus. 4 Ribosomes assemble amino acids into proteins. What is the order of statements that correctly describes how a protein is made? A 2 → 1 → 3 → 4 B 2 → 3 → 4 → 1 C 3 → 1 → 2 → 4 D 3 → 2 → 1 → 4

Question

Which row shows the features of stem cells? type of cell type of cell division involved A specialised meiosis B specialised mitosis C unspecialised meiosis D unspecialised mitosis

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Which statement is a correct description of the role of meiosis? A to create genetically identical daughter cells B to halve the chromosome number in the daughter cells C to create diploid daughter cells D to maintain the chromosome number in the daughter cells

Question

The photomicrograph shows some red blood cells. sickle-shaped red blood cell What are the possible genotype combinations of this person? A HbSHbA or HbSHbS B HbSHbA or HbAHbA C HbAHbA only D HbSHbS or HbAHbA

Question

The events listed may happen in a population. 1 Better adapted organisms survive. 2 Mutation results in variation. 3 Survivors pass on their alleles to the next generation. 4 There is a struggle for survival. Which sequence may lead to evolution in the population? A 1 → 2 → 3 → 4 B 2 → 4 → 1 → 3 C 3 → 2 → 4 → 1 D 4 → 1 → 2 → 3

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Which row describes how energy flows through a biological system? type of energy transferred transferred from a entering a between biological system biological system organisms in a to the environment biological system A chemical heat light B heat chemical heat C light chemical heat D light heat chemical

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The diagram shows a food chain. grass → mouse → owl Which terms describe the position of the owl in this food chain? consumer trophic level A secondary second B secondary third C tertiary second D tertiary third

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Which method is used to produce lactose-free milk? A filtering milk to remove lactose B heating milk to break down lactose C using lactase to break down lactose D using lipase to denature lactose

Question

The diagram shows the positions of four farms and the concentrations of nitrate at different points in a river. Which farm is likely to have been using too much fertiliser on its land? farm C direction of flow farm A farm D farm B direction of flow 60 40 nitrate concentration / ppm 20 0