5479831
Descripción
Test por ahidalgo.maldona, actualizado hace más de 1 año
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Creado por ahidalgo.maldona
hace casi 8 años
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Pregunta 1
Pregunta
Which pair of features is found in plant cells but not in animal cells?
Respuesta
-
cell membrane / cell sap
-
cell sap / cell wall
-
cell wall / nucleus
-
nucleus / cell membrane
Pregunta 2
Pregunta
The diagram shows a small part of a plant cell greatly magnified.
Which part controls what enters and leaves the cell?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 3
Pregunta
When an enzyme molecule has catalysed a chemical reaction in a cell, what happens to it?
Respuesta
-
It acts as a catalyst again.
-
It is denatured.
-
It is digested.
-
It is used up by the reaction.
Pregunta 4
Pregunta
There are four stages in testing a leaf for starch.
1 soften in hot water
2 stain with iodine
3 boil in alcohol
4 boil in water
What is the correct order for these stages?
Respuesta
-
1 / 2 / 3 / 4
-
1 / 4 / 3 / 2
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3/ 1/ 2/ 4
-
4/ 3/ 1/ 2
Pregunta 5
Pregunta
The diagram shows some cells in a leaf of a green plant.
In which layer of cells does most photosynthesis occur?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 6
Pregunta
The diagram shows a section through a human tooth.
Which part is made of the hardest material?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 7
Pregunta
The pie-charts show the compositions of four different foods.
Which food contains the most energy?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 8
Pregunta
The diagram shows apparatus that can be used to demonstrate that the air breathed out by a
person contains more carbon dioxide than the air breathed in.
The person breathes in and out at X.
Where does air enter and leave the apparatus?
Respuesta
-
air enters at (Y) air leaves at (Y)
-
air enters at (Y) air leaves at (Z)
-
air enters at (Z) air leaves at (Y)
-
air enters at (Z) air leaves at (Z)
Pregunta 9
Pregunta
Which cells destroy harmful microorganisms in the blood?
Respuesta
-
goblet cells
-
platelets
-
red blood cells
-
white blood cells
Pregunta 10
Pregunta
The diagram shows part of the human circulatory system.
Which structure carries oxygenated blood?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 11
Pregunta
The drawing shows a plant in a container of water. There is a layer of oil on top of the water that
stops the water evaporating. The apparatus weighs 300 g.
After two hours it weighs 296 g.
What is the rate of transpiration?
Respuesta
-
150 g water / hour
-
148 g water / hour
-
4 g water / hour
-
2 g water / hour
Pregunta 12
Pregunta
Which organ releases insulin when the blood sugar level is too high?
Respuesta
-
kidney
-
liver
-
pancreas
-
stomach
Pregunta 13
Pregunta
The diagram shows a section through a flower
Where do the following occur?
Respuesta
-
pollination 1 fertilisation 2
-
pollination 2 fertilisation 4
-
pollination 3 fertilisation 1
-
pollination 4 fertilisation 3
Pregunta 14
Pregunta
Which process takes place when a sperm joins with an ovum?
Respuesta
-
fertilisation
-
intercourse
-
menstruation
-
sterilisation
Pregunta 15
Pregunta
Which diagrams show the bonding in the molecules of nitrogen and ethene?
Respuesta
Pregunta 16
Pregunta
The reaction of zinc and sulphur to form zinc sulphide is exothermic.
Which information in the table is correct?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 17
Pregunta
Which substance is an ionic compound?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 18
Pregunta
Bromine is in the same group of the Periodic Table as chlorine.
What are the colour and formula of hydrobromic acid likely to be?
Respuesta
-
A
-
B
-
C
-
D
Pregunta 19
Pregunta
Which equation shows an insoluble base reacting with an acid?
Respuesta
-
barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
-
magnesium oxide + hydrochloric acid → magnesium chloride + water
-
sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide
-
zinc + sulphuric acid → zinc sulphate + hydrogen
Pregunta 20
Pregunta
Flame tests are carried out on calcium chloride and copper (II) chloride.
What are the colours of the flames?
Respuesta
Pregunta 21
Pregunta
In an experiment, 100 cm3 of dry air are passed over heated copper turnings until there is no
further change in volume (at r.t.p.).
What volume of gas remains?
Respuesta
-
89 cm3
-
79 cm3
-
21 cm3
-
11 cm3
Pregunta 22
Pregunta
A mixture of copper, magnesium and zinc is added to an excess of dilute sulphuric acid. The
resulting mixture is then filtered.
What is the solid left behind?
Respuesta
-
copper and magnesium
-
copper only
-
magnesium and zinc
-
zinc only
Pregunta 23
Pregunta
Which statement best describes how and why drinking water is sterilised?
Respuesta
Pregunta 24
Pregunta
In which experiment does the metal act as a catalyst?
Respuesta
Pregunta 25
Pregunta
The diagram shows an experiment to investigate the effect of heat on potassium nitrate.
The glowing splint bursts into flame.
What happens to the potassium nitrate when it is heated?
Respuesta
-
type of reaction = combustion gas produced = hydrogen
-
type of reaction = combustion gas produced = oxygen
-
type of reaction = thermal decomposition gas produced = hydrogen
-
type of reaction = thermal decomposition gas produced = oxygen
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