Mock Exam Paper C Ordinary Level Marking Scheme

PRE – LEAVING CERTIFICATE EXMAINATION, 2013

BIOLOGY – ORDINARY LEVEL

Marking Scheme

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Section A

Answer any five questions from this section

1.

Best five answers

5(4)

(a)

Copper or Iron or Zinc

(b)

Vitamin C

(c)

2 : 1

(d)

Potato or bread or pasta etc.

(e)

Nitrogen

(f)

Cellulose

2

(a)

Oak leaf

4

(b)

Increase

4

(c)

Primary consumer

4

(d)

Great Tit or Sparrowhawk

4

(e)

Pollution

4

3

(a)

Animal

No cell wall / no Large vacuole / no chloroplasts Any two

2

2(3)

(b)

A Mitochondria / produce energy

B Nucleus / control centre

C Cell membrane / control what enters and laves the cell

2+2

2+2

2+2

4

The scientists who is regarded as the father of genetics

Mendel

Contains one set of chromosomes

Haploid

The physical expression of the genetic makeup

Phenotype

Different forms of a gene

Alleles

Place on a chromosome where a gene is found

Locus

Has an identical pair of alleles

Homozygous

Allele masked when the other allele is present

Recessive

6(3)+2

5

(a)

4(3)

(b)

Inability to conceive

Any suitable e.g. injury, too much alcohol etc.

3

3

(c)

Any suitable e.g. condom, vasectomy etc.

2

6

(a)

Phototropism

4

(b)

Allows it to get more light for photosynthesis

4

(c)

Auxins or IAA

4

(d)

Geotropism

Gravity (or other suitable pair)

4

4

Section B

Best two answers.

7

(a)

(i) Pacemaker

(ii) Vena cava

3

3

(b)

(i)

More rounded or left side bigger or coronary arteries etc.

3

(ii)

Scalpel

3

(iii)

From atrium to ventricle

3

(iv)

Cut down artery

3

(v)

Correct labels for Tricuspid valve, right ventricle, left atrium, semilunar valve

4(3)

8

(a)

(i) Edible mushroom or yeast etc.

(ii) Poisonous fungus or athletes foot etc.

3

3

(b)

(i)

Wore rubber gloves or washed bench with alcohol etc.

3

(ii)

Ash

3

(iii)

Blob of vaseline

3

(iv)

Supply nutrients

3

(v)

Free of unwanted micro-organisms

3

(vi)

Pink blobs

3

(vii)

No leaf or sterilised leaf

3

(viii)

Disinfect or sterilise before disposal

3

9

(a)

(i) Movement of water through a selectively permeable membrane / from area ...

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