biology

Topics: Hypertension, Heart, Blood Pages: 30 (2888 words) Published: February 3, 2014
GCSE
Biology B
General Certificate of Secondary Education
Unit B731/02: Modules B1, B2, B3 (Higher Tier)

Mark Scheme for June 2012

Oxford Cambridge and RSA Examinations

OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing a wide range of qualifications to meet the needs of candidates of all ages and abilities. OCR qualifications include AS/A Levels, Diplomas, GCSEs, OCR Nationals, Functional Skills, Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT, business, languages, teaching/training, administration and secretarial skills. It is also responsible for developing new specifications to meet national requirements and the needs of students and teachers. OCR is a not-for-profit organisation; any surplus made is invested back into the establishment to help towards the development of qualifications and support, which keep pace with the changing needs of today’s society. This mark scheme is published as an aid to teachers and students, to indicate the requirements of the examination. It shows the basis on which marks were awarded by examiners. It does not indicate the details of the discussions which took place at an examiners’ meeting before marking commenced.

All examiners are instructed that alternative correct answers and unexpected approaches in candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated.

Mark schemes should be read in conjunction with the published question papers and the report on the examination.
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B731/02

Mark Scheme

June 2012

For answers marked by levels of response:
a.
Read through the whole answer from start to finish
b.
Decide the level that best fits the answer – match the quality of the answer to the closest level descriptor c.
To determine the mark within the level, consider the following: Descriptor

Award mark

A good match to the level descriptor
Just matches the level descriptor
d.

The higher mark in the level
The lower mark in the level

Use the L1, L2, L3 annotations in Scoris to show your decision; do not use ticks. Quality of Written Communication skills assessed in 6-mark extended writing questions include: 
appropriate use of correct scientific terms

spelling, punctuation and grammar

developing a structured, persuasive argument

selecting and using evidence to support an argument

considering different sides of a debate in a balanced way

logical sequencing.

1

B731/02

Mark Scheme

Annotations used in scoris
Annotation

Meaning
correct response
incorrect response
benefit of the doubt
benefit of the doubt not given
error carried forward
information omitted
ignore
reject
contradiction
Level 1
Level 2
Level 3

2

June 2012

B731/02

Mark Scheme

Abbreviations, annotations and conventions used in the detailed Mark Scheme. /
(1)
allow
not
reject
ignore
()
__
ecf
AW
ora

=
=
=
=
=
=
=
=
=
=
=

alternative and acceptable answers for the same marking point separates marking points
answers that can be accepted
answers which are not worthy of credit
answers which are not worthy of credit
statements which are irrelevant
words which are not essential to gain credit
underlined words must be present in answer to score a mark (although not correctly spelt unless otherwise stated) error carried forward
alternative wording
or reverse argument

3

June 2012

B731/02

Mark Scheme

Question
(a) (i)
1

Answer

June 2012

Marks
Guidance
2
allow too powerful / too thick
ignore long eyeball

too rounded (1)
focuses light before the retina...
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