Questão 1
Questão
Which of these food groups is used for growth, cell repair and cell replacement?
Questão 2
Questão
Which of these factors can affect your metabolic rate?
Responda
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Muscle: Fat ratio
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Size
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Gender
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Amount of exercise
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Temperature
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Inherited factors
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Heart rate
Questão 3
Questão
Which of these health problems is not caused by obesity?
Responda
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Arthritis
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Type 2 diabetes
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High blood pressure
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Heart disease
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Some cancers
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Kidney disease
Questão 4
Questão
Too much saturated fat in your diet can increase your blood cholesterol level
Questão 5
Questão
Which of these problems can be caused by eating too little?
Responda
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Slow growth (in children)
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Fatigue
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Poor resistance to infection
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Irregular periods
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Underactive thyroid gland
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Lung cancer
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High blood pressure
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Deficiency diseases
Questão 6
Questão
Which of these are differences between bacteria and viruses?
Responda
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Bacteria are small living cells, viruses are smaller than cells
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Bacteria are smaller than cells, viruses are small living cells
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Bacteria make you feel ill by damaging cells and producing toxins, viruses replicate themselves by invading cells and using cells' machinery to produce copies of themselves which will cause the cell to burst - the damage makes you feel ill
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Bacteria replicate themselves by invading cells and using cells' machinery to produce copies of themselves which will cause the cell to burst - the damage makes you feel ill, viruses make you feel ill by damaging cells and producing toxins
Questão 7
Questão
The body's defence system involves the skin, hairs and mucus, platelets and the immune system (white blood cells)
Questão 8
Questão
Vaccinations involve injecting small amounts of active microorganisms
Questão 9
Questão
Which of these drugs actually cures disease?
Questão 10
Questão
Which of the following describes how bacteria can become resistant to antibiotics?
Responda
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Bacteria mutates (to become resistant), infection is treated with antibiotics, only non-resistant killed, resistant survives and reproduces, population of resistant increases
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Population of resistant increases, infection is treated with antibiotics, bacteria mutates (to become resistant), resistant survives and reproduces, only non-resistant killed
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Infection is treated with antibiotics, only non-resistant killed, bacteria mutates (to become resistant), population of resistant increases, resistant survives and reproduces
Questão 11
Questão
Why are cultures of microorganisms kept at 25 degrees C in schools?
Responda
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To stop the agar jelly melting
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To stop harmful pathogens growing
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To give the right conditions for most microorganisms
Questão 12
Questão
What did Ignaz Semmelweis encourage doctors to do?
Responda
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Wash their hands in an antiseptic solution
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Use the drug he created, penicillin
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Put patients with diseases in a different ward to pregnant women
Questão 13
Questão
Which of these is the definition of a stimulus?
Responda
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A cell which is sensitive to light
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A change in your environment
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Where information from the sense organs is sent
Questão 14
Questão
At a synapse, the nerve signal is transferred by chemicals which diffuse across the gap - the chemicals set off a new electrical signal in the next neurone
Questão 15
Questão
Which of the following describes the reflex arc?
Responda
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Sensory neurone, relay neurone, stimulus, response, effector, motor neurone, receptor
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Stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector, response
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Response, stimulus, motor neurone, receptor, relay neurone, effector, sensory neurone,
Questão 16
Questão
Which of these are differences between responses coordinated by nerves and hormones?
Responda
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Nerves - slower action, hormones - very fast action
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Nerves - very fast action, hormones - slower action
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Nerves - act for a very short time, hormones - act for a long time
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Nerves - act for a long time, hormones - act for a very short time
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Nerves - act in a more general way, hormones - act on a very precise area
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Nerves - act on a very precise area, hormones - act in a more general way
Questão 17
Questão
What are the features of FSH (Follicle-Stimulating-Hormone) ?
Responda
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Produced by the pituitary gland
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Produced in the ovaries
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Causes an egg to mature
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Stimulates production of LH
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Stimulates release of egg
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Stimulates production of oestrogen
Questão 18
Questão
Which hormones are used to reduce fertility?
Responda
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FSH
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Oestrogen
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LH
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Progesterone
Questão 19
Questão
A problem associated with IVF is multiple births, which are risky for the mother and babies.
Questão 20
Questão
Which of these statements are true about the plant hormone, auxin?
Questão 21
Questão
The definition of homeostasis is the maintenance of a constant internal environment
Questão 22
Questão
What do anabolic steroids and stimulants do?
Questão 23
Questão
What is the purpose of testing a drug on healthy human volunteers?
Questão 24
Questão
What was thalidomide intended to be used for?
Questão 25
Questão
Illegal drugs have more of an impact than legal drugs
Questão 26
Questão
How are Arctic animals adapted to reduce heat loss?
Responda
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Small surface area to volume ratio
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Large surface area to volume ratio
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Thick layer of blubber
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Thin layers of body fat
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Greasy fur
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Produce little sweat
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Produce small amounts of concentrated urine
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White fur
Questão 27
Questão
Which of these are living factors that could cause the environment to change?
Responda
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A change in the occurrence of infectious diseases
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A change in the number of predators
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A change in the number of prey/availability of food sources
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A change in the number or types of competitors
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A change in average temperature
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A change in average rainfall
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A change in the level of air or water pollution
Questão 28
Questão
Lichen can be used to measure air pollution as they are very sensitive to the concentration of carbon dioxide in the atmosphere
Questão 29
Responda
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The mass of living material
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How much food an animal needs
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The number of species in an area
Questão 30
Questão
How is energy from the Sun lost in the food chain?
Responda
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Plants use it to make food
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Respiration
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Movement
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Controlling body temperature
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Some of the material which makes up the plants & animals is inedible
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Waste materials
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Sleeping
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Eating
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Burning fossil fuels
Questão 31
Questão
In what conditions is decay fastest?
Questão 32
Questão
In the carbon cycle, how is carbon dioxide removed from the air?
Responda
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Combustion
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Respiration
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Photosynthesis
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Decay
Questão 33
Questão
Which of these characteristics are only affected by genetic factors?
Responda
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Gender
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Eye colour
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Blood group
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Inherited disorders
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Weight
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Height
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Accent
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Scars
Questão 34
Questão
A gene is a short length of a chromosome
Questão 35
Questão
Which of these are features of sexual reproduction?
Responda
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There are two parents
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There is one parent
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There is fusion of the gametes
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There is no fusion of the gametes
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There is genetic variation
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There is no genetic variation
Questão 36
Questão
How can cloned offspring be produced using embryo transplants?
Responda
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An unfertilised egg cell is taken and the nucleus is removed and a nucleus from an adult body cell is inserted into the empty egg cell. An electric shock is given to make the embryo divide. When the embryo is a ball of cells it is implanted into a surrogate mother to grow into a clone of the original adult body cell.
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Sperm cells are taken and used to artificially fertilise an egg cell. The embryo that develops is split many times (to form clones) before any cells become specialised. The cloned embryos are implanted into surrogate mothers to form genetically identical offspring.
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Plant cells are taken and put in a growth medium with hormones to grow into new plants, which are clones of the parent plant.
Questão 37
Questão
Enzymes can be used to remove a useful gene from a chromosome and insert into another organism's chromosome
Questão 38
Questão
What was Charles Darwin's theory as to how evolution occurs?
Responda
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Individuals show variation and organisms with beneficial characteristics are more likely to survive and reproduce, passing on their genes and increasing population with this characteristic (natural selection)
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If an organism uses a characteristic a lot then, within its lifetime, it would become more developed - the acquired characteristics would pass on to the next generation
Questão 39
Questão
A mutation is always beneficial to an organism
Questão 40
Questão
Why did many people disagree with Darwin's theory of evolution?
Responda
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It went against common religious beliefs at the time
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No one knew about genes or mutations
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There wasn't enough evidence
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He wasn't a proper scientist
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He published his theory in an obscure journal