Biology 0610/12 October/November 2020: question paper and mark scheme

Question

Which process is carried out by all organisms? A growth B photosynthesis C sexual reproduction D transpiration

Question

According to the binomial system, how should a human be named? A Homo Sapiens B Homo sapiens C homo Sapiens D homo sapiens

Question

Some of the structures found in cells are listed: cytoplasm cell membrane cell wall chloroplast. How many of these structures are found in the cells of all living organisms? A 1 B 2 C 3 D 4

Question

The photomicrograph shows a cell from a type of aquatic plant. S R Q P Which parts labelled on the photomicrograph indicate that this is a plant cell? A P and R B P and S C Q and R D Q and S

Question

Which type of cell transports oxygen? A ciliated B nerve C palisade mesophyll D red blood

Question

The cell shown in the diagram has been magnified 3000 times. The diagram is 21 mm wide. What is the actual diameter of the cell? A 21 mm B 21mm 3000 C 21 mm × 3000 D 3000 21mm

Question

What are features of osmosis? requires a partially diffusion is requires cell walls permeable involved membrane A key B = yes C = no D

Question

The diagram shows apparatus which can be used to demonstrate osmosis. 1 2 glass tube liquid level very concentrated concentrated water sucrose solution sucrose solution partially permeable membrane After one hour, what would happen to the liquid levels in the glass tubes? liquid level in liquid level in tube 1 tube 2 A falls falls B falls rises C rises falls D rises rises

Question

Which substances are made by linking together glucose molecules only? A cellulose, glycogen and starch B fats, cellulose and proteins C proteins, oils and glycogen D starch, fats and oils

Question

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.

Question

What kind of molecule is an enzyme? A fat B glucose C protein D starch

Question

The diagram shows a cell with groups of bacteria around its edge. cell cytoplasm spiral-shaped chloroplast bacteria The bacteria move to areas of high oxygen concentration. Which process in the cell causes the bacteria to form these groups? A digestion B photosynthesis C reproduction D respiration

Question

The graph shows how the percentage of protein found in potatoes was affected by the concentration of nitrate fertiliser added to the crop when it was growing. percentage of protein in potatoes concentration of nitrate fertiliser added These results suggest that greater concentrations of nitrate fertiliser allow the potatoes to make more A amino acids. B cellulose. C lipid. D starch.

Question

Which stage of nutrition takes place when food molecules become part of a body cell? A absorption B assimilation C digestion D ingestion

Question

The diagram shows the apparatus used in an experiment to demonstrate two processes that take place in the body. test-tube pure water dialysis tubing ends dialysis tubing which tightly is partially permeable sealed mixture of saliva and starch solution After one hour, the water outside the dialysis tubing contained reducing sugars. Which two processes are represented by this experiment? A absorption and digestion B absorption and egestion C digestion and egestion D digestion and ingestion

Question

Which type of organism causes tooth decay? A arachnid B bacterium C producer D virus

Question

In which order does water pass through these structures in a plant? A mesophyll → root hair → xylem B mesophyll → xylem → root hair C root hair → mesophyll → xylem D root hair → xylem → mesophyll

Question

What is a function of phloem? A transports minerals to the roots B transports starch to the roots C transports sugar to the roots D transports water to the roots

Question

What ensures that blood flows in one direction in the human circulatory system? A diffusion of carbon dioxide B diffusion of oxygen C thick walled arteries D valves

Question

Some functions of blood are listed. 1 antibody production 2 blood clotting 3 oxygen transport 4 phagocytosis What are functions of white blood cells? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

Which is an example of a transmissible disease? A coronary heart disease due to eating high fat food B cholera after drinking contaminated water C liver damage due to drinking alcohol D lung cancer due to inhaling tobacco smoke

Question

The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest? from pulmonary artery C B to pulmonary vein D A

Question

What is produced during anaerobic respiration in muscles? A carbon dioxide B ethanol C lactic acid D water

Question

The amount of urea in the blood increases as it passes through organ X. What is organ X? A heart B kidney C liver D pancreas

Question

Which structure contains relay neurones? A gland B muscle C spinal cord D synapse

Question

A man injures his arm in an accident. Afterwards, he can move his hand but cannot feel objects touching his hand. What could cause this? A Both sensory and motor neurones are cut. B Effectors are damaged. C Motor neurones are cut. D Sensory neurones are cut.

Question

What are the effects of adrenaline on the human body? breathing rate pulse rate size of pupils A decreased decreased decreased B decreased decreased increased C increased increased decreased D increased increased increased

Question

Which is the correct definition of a drug? A a substance that affects or modifies chemical reactions in the body B a substance that can have negative social implications C a substance that can affect reaction times and self-control D a substance that can kill bacteria

Question

The diagram shows a flower cut in half. Which structure receives the pollen nucleus during fertilisation? A B C D

Question

During childbirth, what must happen to the amniotic sac, cervix and the uterus wall? amniotic sac cervix uterus wall A breaks contracts contracts B breaks dilates contracts C expands contracts relaxes D expands dilates relaxes

Question

What is a barrier method of birth control? A contraceptive pill B diaphragm C contraceptive implant D vasectomy

Question

Which is a correct description of mitosis? A It produces genetically identical cells called gametes. B It produces genetically identical cells for growth and repair. C It produces genetically different cells for growth. D It produces genetically different cells called gametes.

Question

Which term is used to describe alleles that are always expressed when they are present in the genotype? A dominant B heterozygous C homozygous D recessive

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Some human phenotypes are listed. 1 body mass 2 foot size 3 height 4 sex Which features are examples of continuous variation? A 1, 2 and 3 B 1, 3 and 4 C 1 and 4 only D 2 and 3 only

Question

A food chain is shown. potato plant → slug → hedgehog By which process is energy transferred from the slug to the hedgehog? A egestion B excretion C ingestion D photosynthesis

Question

The diagram shows a food web. energy from sunlight organism organism organism H J K organism L What is organism L? A a carnivore B a decomposer C a herbivore D a producer

Question

The diagram shows part of the carbon cycle. carbon dioxide X dead matter plants Y animals What do arrows X and Y represent? A decay and respiration B feeding and photosynthesis C photosynthesis and respiration D respiration and feeding

Question

What can be used to reduce competition between crop plants and weeds? A fertilisers B herbicides C insecticides D pollinators

Question

Large areas of forest are cut down in order to clear the land for other uses. If the land is not replanted with trees or crops, what effect does this have on the atmosphere? A Carbon dioxide remains the same. B Carbon dioxide increases. C Oxygen increases. D Water vapour increases.

Question

The diagram shows four positions on a river where water samples were taken. untreated sewage X outlet direction of flow W Y Z Which graph shows oxygen concentrations in the river? A B oxygen oxygen concentration concentration W X Y Z W X Y Z position position C D oxygen oxygen concentration concentration W X Y Z W X Y Z position position