Mock Exam Paper C Higher Level Marking Scheme

PRE – LEAVING CERTIFICATE EXMAINATION, 2013

BIOLOGY – HIGHER LEVEL

Marking Scheme

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Section A

Best five answers from this section

1.

Best five answers

(a)

Amino Acids / glycerol and / fatty acids

2+1+1

(b)

Enzymes / shape / specificity Any two

2(2)

(c)

Magnesium (chlorophyll) / Iron (blood)

2(2)

(d)

6CO2 + 6H20 = C6H12O6 + 6O2

2(2)

(e)

Biuret or Copper sulphate + sodium hydroxide / Purple

2(2)

(f)

Carbohydrates and fats

2(2)

2

(a)

Groundwater pollution / vermin / unsightly / smelly etc. Any two

6(3)+2

(b)

Quantitative – how many / Qualitative – what species

Throw bean bag over shoulder and sample where it lands (or other acceptable)

(c)

Unobtrusively / not to make it obvious

3

(a)

Down rapidly / levelling off at low level or going to zero

2(3)

(b)

Lag / adapting to the environment / log / multiplying rapidly / food / competition

6(2)

(c)

encyst

3

4

(a)

(i) reproduction (ii) growth / repair

6(3)+2

(b)

2 cells – 4 cells / same chromosome number - ½ chromosome number / identical – not identical

Any two

(c)

Anaphase

(d)

Diploid / chromosomes in pairs

5

(a)

Pepsin

6(3)+2

(b)

Pepsinogen / won’t digest cell it is produced in /stomach

(c)

Temperature / 37oC

(d)

Denatured

6

(a)

Growth response / to a stimulus

6(3)+2

(b)

left

(c)

Inhibit growth

(d)

geotropism

(e)

Thorns / stings / oils etc

Section B

Answer any two questions.

Write your answers in the spaces provided

7

(a)

Glycolysis / cytoplasm / little or 2ATP

3(3)

(b)

(i)

Diagram showing anaerobic conditions /

3

(ii)

Zymase or yeast / glucose or sugar

2(3)

(iii)

Bubbles stopped or solution cleared

3

(iv)

Ethanol killed or deactivated the yeast

3

(v)

No yeast

3

(vi)

comparison

3

8

(a)

  1. Mitochondria / chloroplasts
  2. Uracil

2(3)

3

(...

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