Free Printable Past Papers

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58.

Dianthus flowers can be one of three different colours: red, pink or white. A red flower is always homozygous and a white flower is always homozygous. Pink flowers are heterozygous. If a red and a white flower are crossed, what percentage of the offspring will be pink?

a)

0%

b)

25%

c)

75%

d)

100%

59.

Cell division by meiosis of a parent cell with 23 pairs of chromosomes will result in

a)

2 cells, each with 23 pairs of chromosomes

b)

2 cells, each with 23 single chromosomes.

c)

4 cells, each with 23 pairs of chromosomes.

d)

4 cells, each with 23 single chromosomes.

60.

The graph shows the levels of dissolved oxygen and mineral ions in a river. At which point does raw sewage enter the river?

a)

A

b)

B

c)

C

d)

D

61.

The diagrams show an experiment on transpiration. Four leaves of the same species are balanced on two drinking straws. One or both sides of the leaves are covered in grease. Any difference in mass causes the heavier end to be lower. At the start of the experiment the straws were positioned so that the leaves were level. Which leaves will be lower after an hour?

a)

1 and 3

b)

1 and 4

c)

2 and 3

d)

2 and 4

62.

Which is the result of the release of adrenaline?

a)

constrictions of pupils

b)

decrease in breathing rate

c)

decrease in pulse rate

d)

increase in blood glucose concentration

63.

When the blood glucose concentration is low, which organ releases which hormone?

a)

A

b)

B

c)

C

d)

D

64.

The graph shows the change in blood glucose levels of a pupil at a school on a normal day. What could explain the dip in blood sugar after he left school? (Choose 2 answers)

a)

He ran home

b)

He got into a fight

c)

He did not produce enough insulin

d)

He produced too much glucagon

65.

How do liver cells respond to increased insulin levels in the blood?

a)

They absorb glucose and convert it to glycogen

b)

They absorb glucose and convert it to glucagon

c)

They break down glucagon and release the glucose into the blood

d)

They break down glycogen and release the glucose into the blood

e)

They release glucagon into the blood

66.

Albinism is a genetic condition caused by a recessive allele, a.

People with this condition are called albinos. They have white hair and pale skin.

What is the probability of two parents who are heterozygous for this condition producing an albino child?

a)

0%

b)

25%

c)

50%

d)

75%

67.

The Venus flytrap is a plant that feeds on insects. When a fly lands on the leaf, the leaf folds very quickly and traps the fly. The leaves produce enzymes which digest the fly. Which characteristics of living organisms are involved?

a)

excretion, growth, nutrition

b)

movement, excretion, nutrition

c)

movement, sensitivity, growth

d)

movement, sensitivity, nutrition

68.

How do carbon dioxide and oxygen move into and out of a mesophyll cell?

a)

active transport

b)

diffusion

c)

respiration

d)

transpiration

69.

a)

A

b)

B

c)

C

d)

D

70.

Hormones are eventually removed from the blood and destroyed by which organ?

a)

Kidneys

b)

Liver

c)

Brain

d)

White blood cells

71.

What is an allele?

a)

an organisms genome

b)

different versions of the same gene

c)

same versions of different genes

d)

different chromosomes

72.

Why did population of white peppered moths decrease during the industrial evolution?

a)

White moths were better camouflaged so they, survived and bred.

b)

Black moths were better camouflaged so they, survived and bred.

c)

White moths were better camouflaged so they were more likely to be eaten by predators.

d)

Black moths were better camouflaged so they were more likely to be eaten by predators.

73.

Which of the following could be used as a vector for a human gene?

a)

Bacterial Plasmid

b)

Bacteria

c)

A mitochondria

d)

mRNA

74.

Which enzyme glues DNA together?

a)

Ligase

b)

Polymerase

c)

Helicase

d)

Sucrase

75.

"transgenic" refers to an animal that:

a)

Has DNA from another species spliced into its genome

b)

Has undergone DNA modification

c)

Has unique genes for its species

76.

In which ways can genetic engineering can improve crops

a)

Make them pest or drought resistant

b)

Make them more nutritious

c)

Make them larger

d)

All answers are correct

77.

What are the products of anaerobic respiration of bacteria used in yoghurt making?

a)

carbon dioxide and water

b)

carbon dioxide an oxygen

c)

lactic acid

d)

lactic acid and water

78.

What is the function of the air inlet in the fermenter?

a)

Provide clean air

b)

Provide oxygen for the aerobic respiration of microrganisms

c)

Provide carbon dioxide for the anaerobic respiration of microrganisms

d)

Mixes the solution to keep nutrients and temperature evenly distributed.

79.

The process to go from DNA to mRNA is _______

a)

translation

b)

transcription

c)

replication

80.

Would a mutation in the DNA of a skin cell be passed on to an organism's offspring?

a)

Yes, because any change to the DNA is passed on to the offspring

b)

Maybe. Sex cells only use half of the body's genetic code. It might get the copy of a gene that wasn't mutated.

c)

No. Only mutations that occur in the gametes (sex cells) are passed on to the offspring

d)

Without knowing the animal, it would be hard to tell whether or not the mutation would be passed on.

81.

a)

A

b)

B

c)

C

d)

D

82.

a)

A

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B

c)

C

d)

D

83.

a)

A

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B

c)

C

d)

D

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C

d)

D

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a)

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B

c)

C

d)

D

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a)

A

b)

B

c)

C

d)

D

87.

a)

A

b)

B

c)

C

d)

D

88.

The effect of deficiency of magnesium in plants.

a)

Stunted growth of plant

b)

Plants will wilt because cells are becoming flaccid

c)

Decrease in the number of enzymes, which will reduce the rate of photosynthesis

d)

Less chlorophyll is produced so less light energy is captured for photosynthesis

89.

How does the human body return carbon to the atmosphere in the carbon cycle?

a)

Waste products

b)

Photosynthesis

c)

Cellular respiration

d)

Formation of glucose

90.

Which picture shows how bottles P and Q look after one day?

a)

A

b)

B

c)

C

d)

D

91.

Which term refers to the process by which individuals that are better suited to the environment survive and reproduce therefore passing down their genes to their offspring?

a)

Evolution

b)

Variation

c)

Adaptation

d)

Natural Selection

92.

The amount of energy that usually transfers from one trophic level to the next...

a)

10%

b)

20%

c)

80%

d)

50%

93.

According to the diagram, when did the common ancestor of giant pandas and spectacled bears exist?

a)

5-10 mya

b)

10-15 mya

c)

15-20 mya

d)

20-25 mya

94.

Which of the following organisms has the highest TSA/V ratio?

a)

Amoeba

b)

Grasshopper

c)

Elephant

d)

Human

95.

_____ are cells that enclose their DNA in nuclei.

a)

Phototophylites

b)

Prokaryote

c)

Eukaryote

d)

LocoKaryotes

96.

Most prokaryotic cells produce a strong supporting layer around the cell membrane known as a(n) ___ ____.

a)

plastic cellotite

b)

cell wall

c)

selective argroleme

d)

vacuole pyrite

97.

A group of similar cells that perform a particular function.

a)

tissue

b)

no cells are similar

c)

plutonium

d)

argon

98.

Many groups of tissue work together as a (n) _____.

a)

peticure

b)

organ

c)

oligarchy

d)

olive

99.

Which of the following is true about the kingdom Bacteria?

a)

Bacteria are not motile.

b)

Bacteria have a cell wall.

c)

Bacteria reproduce sexually.

d)

Some bacteria have a nucleus.

100.

The flower of a plant is involved in reproduction. Which parts are male and which are female?

a)

Male: style; female: filament

b)

Male: xylem; female: anther

c)

Male: stamen; female: pistil

d)

Male: ovary; female: stamen

101.

Which symbiotic relationship is described by one individual benefiting and the other being neither harmed nor benefited?

a)

Mutualism

b)

Commensalism

c)

Parasitism

d)

Competition

102.

A change in DNA is called a __________________.

a)

Nucleotide

b)

Mutation

c)

Radiation

d)

Transcription

103.

The human body has 23 homologous pairs of chromosomes. How many chromosomes does a somatic cell have?

a)

12

b)

23

c)

46

d)

92

104.

Which of the following would provide the most energy in an ecosystem?

a)

Producers

b)

Herbivore

c)

Omnivore

d)

Carnivore

Past Papers

Total questions: 104

Worksheet time: 1hrs 16mins

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