Gabi Germain
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Questions on the whole unit 3 Biology specification!

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Gabi Germain
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GCSE AQA Biology Unit 3

GCSE AQA Biology Unit 3

Question 1 of 72

1

dissolved substances move by active transport and diffusion

Select one of the following:

  • True
  • False

Explanation

Question 2 of 72

1

how does water move across boundaries

Select one of the following:

  • diffusion

  • active transport

  • osmosis

Explanation

Question 3 of 72

1

osmosis is from an area of...

Select one of the following:

  • low concentration (dilute) to high concentration (concentrated)

  • high concentration to low

Explanation

Question 4 of 72

1

the membrane in osmosis is semi permeable

Select one of the following:

  • True
  • False

Explanation

Question 5 of 72

1

what causes the water to move In or out of the cell?

Select one of the following:

  • Difference in substance

  • Difference in concentration

  • Difference in energy

Explanation

Question 6 of 72

1

what do most soft drinks contain? (3 answers)

Select one or more of the following:

  • water

  • air

  • carbon dioxide

  • sugar

  • ions

Explanation

Question 7 of 72

1

why do sports drinks contain sugars?

Select one of the following:

  • so they can run faster and further

  • to replace sugar used in energy release during the activity

Explanation

Question 8 of 72

1

if water ions aren't replaced the ion/water balance of the body is disturbed so cells don't work efficiently.

Select one of the following:

  • True
  • False

Explanation

Question 9 of 72

1

why do sports drinks contain water?

Select one of the following:

  • to provide them with more energy

  • to replace water lost when sweating

Explanation

Question 10 of 72

1

which process of exchanging materials requires energy?

Select one of the following:

  • Osmosis

  • Active transport

Explanation

Question 11 of 72

1

Facts about active transport: (3 answers)

Select one or more of the following:

  • Substances absorbed with the concentration gradient

  • substances absorbed against the concentration gradient

  • uses energy from respiration

  • doesn't require energy

  • allows cells to absorb ions from very dilute solutions

Explanation

Question 12 of 72

1

How can you increase the efficiency of an exchange surface?

Select one or more of the following:

  • have a lower surface area

  • have a high surface area

  • being thin

  • having a long diffusion path

  • (In animals) having a good blood supply

  • being well ventilated (also only in animals)

Explanation

Question 13 of 72

1

why are exchange surfaces adapted in humans?

Select one of the following:

  • To increase effectiveness

  • to make sure things don't diffuse too fast

Explanation

Question 14 of 72

1

the size and complexity of an organism increases the difficulty of exchanging materials

Select one of the following:

  • True
  • False

Explanation

Question 15 of 72

1

what is the surface area of the lungs increased by?

Select one of the following:

  • alveoli

  • villi

Explanation

Question 16 of 72

1

what is the surface area of the small intestine increased by?

Select one of the following:

  • alveoli

  • villi

Explanation

Question 17 of 72

1

villi have an extensive network of capillaries to absorb products from digestion by active transport and diffusion

Select one of the following:

  • True
  • False

Explanation

Question 18 of 72

1

facts about the lungs: (4 answers)

Select one or more of the following:

  • protected by the ribs

  • below the diaphragm

  • above the diaphragm

  • diaphragm separates it from the thorax (the upper part of the body)

  • diaphragm separates it from the abdomen (lower part of the body)

  • in the upper part of the body

Explanation

Question 19 of 72

1

why does the breathing system take air into and out of the body?

Select one of the following:

  • so oxygen from the air can diffuse into the bloodstream and carbon dioxide can diffuse out into the air

  • so carbon dioxide from the air can diffuse into the bloodstream and oxygen can diffuse out into the air

Explanation

Question 20 of 72

1

what happens to make air move into the lungs, find the wrong answer?

Select one or more of the following:

  • ribcage moves up and out

  • ribcage move down and in

  • diaphragm becomes flatter

  • intercostal muscles contract as well as the diaphragm

Explanation

Question 21 of 72

1

the movement of air into and out of the lungs is known as what?

Select one of the following:

  • breathing

  • respiration

  • ventilation

Explanation

Question 22 of 72

1

carbon dioxide enters leaves by diffusion

Select one of the following:

  • True
  • False

Explanation

Question 23 of 72

1

where are most of the water and mineral ions absorbed?

Select one of the following:

  • the leaves from the air

  • the roots from the soil

Explanation

Question 24 of 72

1

how is the surface area of the roots increased?

Select one of the following:

  • by root hairs

  • by thin walls

Explanation

Question 25 of 72

1

how are leaves surface area increased?

Select one or more of the following:

  • by their flattened shape

  • internal air spaces

  • guard cells

  • being green

Explanation

Question 26 of 72

1

plants have stomata to get CO2 from the atmosphere and to remove/release oxygen produced in photosynthesis

Select one of the following:

  • True
  • False

Explanation

Question 27 of 72

1

where do plant mainly lose water vapour?

Select one or more of the following:

  • stem

  • leaves through the stomata

  • root systems

Explanation

Question 28 of 72

1

where is evaporation more rapid

Select one of the following:

  • hot dry windy conditions

  • cold wet and still conditions

Explanation

Question 29 of 72

1

if plants lose water faster than it is replaced what happens?

Select one of the following:

  • stomata close to prevent wilting

  • stomata open to induce wilting

Explanation

Question 30 of 72

1

the size of the stomata is controlled by the guard cells

Select one of the following:

  • True
  • False

Explanation

Question 31 of 72

1

What does the circulatory system do?

Select one of the following:

  • Transport blood around the body

  • Transport substances around the body

Explanation

Question 32 of 72

1

The heart is an organ that pumps blood around the body and the walls are made from mostly muscle tissue

Select one of the following:

  • True
  • False

Explanation

Question 33 of 72

1

How many chambers does the heart have?

Select one of the following:

  • 2

  • 3

  • 4

Explanation

Question 34 of 72

1

when blood enters the atria they contract to force blood into where?

Select one of the following:

  • Vena cava

  • Pulmonary vein

  • ventricles

  • atrium

Explanation

Question 35 of 72

1

where do ventricles force blood?

Select one of the following:

  • Into the heart

  • Out of the heart

Explanation

Question 36 of 72

1

Where does blood flow through to the organs?

Select one of the following:

  • arteries and veins

  • capillaries and veins

  • arteries and capillaries

Explanation

Question 37 of 72

1

Arteries have thick walls containing muscle and elastic fibres

Select one of the following:

  • True
  • False

Explanation

Question 38 of 72

1

why do veins have thinner walls and valves?

Select one of the following:

  • to allow blood to flow faster

  • to prevent backflow of blood

  • to increase blood pressure

Explanation

Question 39 of 72

1

If arteries begin to narrow and restrict blood flow stents are used to keep them open

Select one of the following:

  • True
  • False

Explanation

Question 40 of 72

1

in organs where does the blood flow through, to get certain substances through their walls?

Select one of the following:

  • veins

  • arteries

  • capillaries

Explanation

Question 41 of 72

1

Facts about blood: (2 facts)

Select one or more of the following:

  • it is a tissue

  • consists of a fluid called plasma

  • Its red

  • platelets are suspended in the cells of blood

Explanation

Question 42 of 72

1

Blood plasma transports:

Select one or more of the following:

  • CO2 from organs to the lungs

  • CO2 out of the body

  • Urea from the liver to the kidneys

  • Soluble products of digestion from the small intestine to other organs

  • Soluble products of digestion from the large intestine to other organs

Explanation

Question 43 of 72

1

Red blood cells transport CO2 from the lungs to the organs

Select one of the following:

  • True
  • False

Explanation

Question 44 of 72

1

2 facts about white blood cells:

Select one or more of the following:

  • they have a nucleus

  • they have no nucleus

  • they form part of the body's defence mechanisms

  • carry oxygen

Explanation

Question 45 of 72

1

what are platelets and do they have a nucleus?

Select one of the following:

  • small fragments of a cell and yes

  • large fragments of a cell and yes

  • large fragments of a cell and no

  • Small fragments of a cell and no

Explanation

Question 46 of 72

1

Platelets help blood clot at the side of a wound

Select one of the following:

  • True
  • False

Explanation

Question 47 of 72

1

What does xylem tissue transport?

Select one of the following:

  • Water and mineral ions

  • Nutrients

Explanation

Question 48 of 72

1

What does phloem tissue transport?

Select one of the following:

  • dissolved sugars to the leaves

  • nutrients to the leaves

  • Phloemeliosus

Explanation

Question 49 of 72

1

the movement of water from the roots through the xylem out of the leaves is called the what?

Select one of the following:

  • Diffusion

  • Transpiration stream

  • Osmosis

Explanation

Question 50 of 72

1

How is carbon dioxide produced?

Select one of the following:

  • From trees

  • By respiration

  • Photosynthesis

Explanation

Question 51 of 72

1

Carbon dioxide is removed from the body by the lungs when we breathe out

Select one of the following:

  • True
  • False

Explanation

Question 52 of 72

1

How is urea produced?

Select one of the following:

  • The breakdown of amino acids in the liver

  • The breakdown of amino acids in the kidneys

Explanation

Question 53 of 72

1

Urea is removed by kidneys in the urine and stored by the bladder

Select one of the following:

  • True
  • False

Explanation

Question 54 of 72

3

A healthy kidney produces urine by: (3 points)

Select one or more of the following:

  • Filtering the blood

  • Reabsorbing urea

  • Reabsorbing dissolved ions, water and sugars

  • Releasing urea

  • Releasing all sugars

Explanation

Question 55 of 72

1

How can a person be treated with kidney failure?

Select one or more of the following:

  • Dialysis

  • Dieting

  • Kidney transplant

  • Exercising

Explanation

Question 56 of 72

1

Facts about dialysis: (4 points)

Select one or more of the following:

  • Restores concentration of dissolved substances in blood to normal levels

  • Permeable membrane

  • Partially permeable membrane

  • Dialysis fluid has the same concentration of useful substances as the blood

  • Removes urea from the blood

  • Removes glucose from the blood

Explanation

Question 57 of 72

1

The donor kidney may be rejected by the immune system unless precautions are taken

Select one of the following:

  • True
  • False

Explanation

Question 58 of 72

1

What are antigens?

Select one of the following:

  • Proteins on the surface of cells

  • Proteins on the surface of antibodies

  • Proteins in the blood

Explanation

Question 59 of 72

1

What two ways can rejection be prevented from a transplant?

Select one of the following:

  • Immunosuppressants and excersize

  • Diet and good tissue match

  • Good tissue match and taking immunosuppressants

Explanation

Question 60 of 72

1

More water is lost when it is cold and more water has to be taken in to balance this loss

Select one of the following:

  • True
  • False

Explanation

Question 61 of 72

1

Sweating helps to cool the body

Select one of the following:

  • True
  • False

Explanation

Question 62 of 72

1

Where is the body temperature controlled?

Select one of the following:

  • Skin (touch sensitive cells)

  • The thermoregulatory system

  • The prefrontal cortex

Explanation

Question 63 of 72

2

If the core body temperature is too high:

Select one or more of the following:

  • Blood vessels dilate

  • Blood vessels constrict

  • More sweat is produced

  • Less sweat is produced

Explanation

Question 64 of 72

2

If the core body temperature is too low:

Select one or more of the following:

  • Blood vessels dilate

  • Blood vessels constrict

  • Muscles shiver

  • Sweat is produced

Explanation

Question 65 of 72

1

Where is blood glucose monitored?

Select one of the following:

  • Pancreas

  • Liver

  • Kidney

Explanation

Question 66 of 72

1

The pancreas produces the hormone insulin which allows glucose to move from the blood into cells

Select one of the following:

  • True
  • False

Explanation

Question 67 of 72

1

glucagon is produced in the pancreas when blood glucose levels fall, but what does it do?

Select one of the following:

  • causes glucagon to be converted into glucose and this is released into the blood

  • Causes glycogen to be converted into glucose and be released into the blood

Explanation

Question 68 of 72

3

What are 3 ways type 1 diabetes can be controlled?

Select one or more of the following:

  • Diet

  • Exercise

  • Environment

  • Insulin injections

  • Glucose injections

Explanation

Question 69 of 72

1

Type 1 diabetes is when someones blood glucose rises too high as their pancreas doesn't produce enough insulin

Select one of the following:

  • True
  • False

Explanation

Question 70 of 72

1

Deforestation leads to ______ in biodiversity

Select one of the following:

  • Increase

  • reduction

Explanation

Question 71 of 72

1

Which gas is released when peat bogs were destroyed?

Select one of the following:

  • Carbon dioxide

  • Hydrogen

  • Oxygen

Explanation

Question 72 of 72

1

Fishing quotas and fish net size are two ways we can reduce the amount of fishing

Select one of the following:

  • True
  • False

Explanation

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