Download Module Number- 3181

-SQA- SCOTTISH QUALIFICATIONS AUTHORITY
NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION
GENERAL INFORMATION
-Module Number-
3181893
-Superclass-
RD
-Title-
BIOCHEMISTRY
-Session- 1993-94
-------------------------------DESCRIPTIONGENERAL COMPETENCE FOR UNIT: Investigating simple carbohydrates and
lipids as well as describing various aspects of amino acids, proteins and
describing the structural features of nucleic acids.
OUTCOMES
1.
investigate the structures, properties and biological activity of simple
carbohydrates;
2.
investigate the structure and properties of lipids;
3.
describe the structural features, reactions and biological role of amino
acids and proteins;
4.
describe the structural features of nucleic acids.
CREDIT VALUE: 1 NC Credit
ACCESS STATEMENT:
3181121 Nature of Organic Compounds
3180022 Organic Chemistry - Reactions and Synthesis
Pathways
---------------------------------For further information contact: Committee and Administration Unit, SQA,
Hanover House, 24 Douglas Street, Glasgow G2 7NQ.
This specification is distributed free to all approved centres. Additional copies
may be purchased from SQA (Sales and Despatch section) at a cost of £1.50
(minimum order £5).
Unit No. 3181893
Continuation
Session 1993-94
NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION
STATEMENT OF STANDARDS
UNIT NUMBER:
3181893
UNIT TITLE:
BIOCHEMISTRY
Acceptable performance in this unit will be the satisfactory achievement of the
standards set out in this part of the specification. All sections of the statement of
standards are mandatory and cannot be altered without reference to SQA.
OUTCOME
1.
INVESTIGATE THE STRUCTURES, PROPERTIES
BIOLOGICAL ACTIVITY OF SIMPLE CARBOHYDRATES
AND
PERFORMANCE CRITERIA
(a)
(b)
(c)
(d)
(e)
The representations of the structures of simple monosaccharides
for cyclic forms and Fischer projections are correct.
The description of the representations of the partial structures of
starch and cellulose and the nature of the linkage is correct.
The descriptions of the properties of carbohydrates are correct
and related to their structure.
The description of the biological role of specified carbohydrates
is correct.
The analysis of a carbohydrate for a given chromatographic
technique is correct.
RANGE STATEMENT
The range statement for this outcome is specified within the performance criteria.
EVIDENCE REQUIREMENTS
Written evidence of the ability to represent specified structures in Performance
Criterion (a) and describe the various representations, properties and biological
roles given in Performance Criteria (b), (c) and (d) respectively.
Performance evidence of the ability to analyse a carbohydrate which will include
carrying out an experiment.
Written evidence also for Performance Criterion (e) of the recorded observations,
reported results and valid conclusions.
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Unit No. 3181893
Continuation
Session 1993-94
An appropriate performance level must be used when judging sufficiency of
evidence.
OUTCOME
2.
INVESTIGATE THE STRUCTURE AND PROPERTIES OF
LIPIDS
PERFORMANCE CRITERIA
(a)
(b)
(c)
(d)
The descriptions of the structure of lipids are correct in terms of
the carboxylic esters derived from gycerol.
The descriptions of saponification are correct and equations
correctly balanced.
The description of the role of lipids in nutrition, health and
disease is correct.
The analysis of fatty acids and fats is correct.
RANGE STATEMENT
The range statement for this outcome is specified within the performance criteria.
EVIDENCE REQUIREMENTS
Written evidence of the ability to describe the structure of lipids, saponification
and the specified role of lipids.
Performance evidence of the ability to analyse fatty acids which will include
carrying out an experiment.
Written evidence also for Performance Criterion (d) of the recorded observations,
reported results and valid conclusions.
An appropriate performance level must be used when judging sufficiency of
evidence.
OUTCOME
3.
DESCRIBE THE STRUCTURAL FEATURES, REACTIONS AND
BIOLOGICAL ROLE OF AMINO ACIDS AND PROTEINS
PERFORMANCE CRITERIA
(a)
(b)
The representations of amino acids and proteins are correct for
given examples.
The descriptions of the properties of amino acids and proteins
are correct for given examples.
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Unit No. 3181893
(c)
(d)
(e)
(f)
Continuation
Session 1993-94
The descriptions of the role of proteins are correct for biological
systems.
The description of the role of enzyme, of the modes of action
and of the factors affecting its activity are correct for specific
examples.
The analysis of amino acids and proteins is correct for an
electrophoretic technique.
The determination of the activity of an enzyme is correct using an
experimental technique.
RANGE STATEMENT
The range statement for this outcome is specified within the performance criteria.
EVIDENCE REQUIREMENTS
Written evidence of the ability to give the required representations of amino
acids and proteins and to describe specified properties, role of proteins and the
role of enzyme given with performance Criteria (a) to (d) respectively.
Performance evidence of the ability to analyse amino acids which will include
carrying out an experiment. Written evidence also for Performance Criterion (e)
of the recorded observations, reported results and valid conclusions.
Performance evidence of the ability to determine the activity of an enzyme which
will include the carrying out of an experiment. Written evidence also for
Performance Criterion (f) of the recorded observations, reported results and valid
conclusions.
An appropriate performance level must be used when judging sufficiency of
evidence.
OUTCOME
4.
DESCRIBE THE STRUCTURAL FEATURES OF NUCLEIC
ACIDS
PERFORMANCE CRITERIA
(a)
(b)
The representations of the structure of DNA and RNA are
accurate with respect to their structure.
The description of the processes of replication, transcription and
translation for given examples are correct.
RANGE STATEMENT
The range statement for this outcome is specified within the performance criteria.
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Unit No. 3181893
Continuation
Session 1993-94
EVIDENCE REQUIREMENT
Written evidence of the ability to describe the process of replication, transcription
and translation and provide representations of the structure of DNA and RNA.
An appropriate performance level must be used when judging sufficiency of
evidence.
---------------------------------
ASSESSMENT RECORDS
In order to achieve this unit, candidates are required to present sufficient
evidence that they have met all the performance criteria for each outcome within
the range specified. Details of these requirements are given for each outcome.
The assessment instruments used should follow the general guidance offered by
the SQA assessment model and an integrative approach to assessment is
encouraged. (See references at the end of support notes).
Accurate records should be made of assessment instruments used showing how
evidence is generated for each outcome and giving marking schemes and/or
checklists, etc. Records of candidates' achievements should be kept. These
records will be available for external verification.
SPECIAL NEEDS
In certain cases, modified outcomes and range statements can be proposed for
certification. See references at end of Support Notes.
 Copyright SQA 1993
Please note that this publication may be reproduced in whole or in part for
educational purposes provided that:
(i)
(ii)
no profit is derived from the reproduction;
if reproduced in part, the source is acknowledged.
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Unit No. 3181893
Continuation
Session 1993-94
NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION
SUPPORT NOTES
UNIT NUMBER
3181893
UNIT TITLE
BIOCHEMISTRY
SUPPORT NOTES: This part of the unit specification is offered as guidance.
None of the sections of the support notes is mandatory.
NOTIONAL DESIGN LENGTH:
SQA allocates a notional design length to a
unit on the basis of time estimated for achievement of the stated standards by a
candidate whose starting point is as described in the access statement. The
notional design length for this unit is 40 hours. The use of notional design length
for programme design and timetabling is advisory only.
PURPOSE This module will enable the candidate to develop an understanding of
biochemistry and protein solving skills, required within the context of biological
chemistry.
SQA publishes summaries of NC units for easy reference, publicity purposes,
centre handbooks, etc. The summary statement for this unit is as follows:
This module will enable you to investigate the structure and properties of
carbohydrates and lipids. You will also learn how to describe the structural
features, reactions and biological role of amino acids and proteins and the
structural features of nucleic acids.
CONTENT/CONTEXT Safety regulations and safe working procedures should
be observed at all times.
Corresponding to Outcomes 1-4:
1.
Monosaccharides - pentoses and hexoses, general properties - reducing
and non-reducing sugars; mutarotation and ring structure. Structure of
starch and cellulose and the nature of the linkage. Biological role of
carbohydrates.
2.
Lipids - structure - glycerol and carboxylic esters derived from glycerol;
fatty acids; saponification. Role of lipids in nutrition, health and disease.
3.
Structure of amino acids, ionic forms, zwitterions and the Isoeletric point.
Peptide linkage. Properties of amino acids and simple proteins. Role of
proteins in biological systems. Structure of proteins in biological systems.
Structure of enzymes. Structure of enzymes, modes of action and factors
affecting activity.
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Unit No. 3181893
4.
Continuation
Session 1993-94
Structure of DNA and RNA. Replication, transcription and translation.
APPROACHES TO GENERATING EVIDENCE A candidate-centred resource
based approach is likely to be the most suitable for this module. During the work
of the module, candidates should have several opportunities to develop practical
and problem-solving skills.
Each candidate should be assessed at appropriate points throughout the
module. Where a candidate is unsuccessful in achieving an outcome, provision
should be made for remediation and reassessment.
Safety considerations should be observed at all times.
ASSESSMENT PROCEDURES Centres may use the Instrument of Assessment
which are considered by tutors/trainers to be the most appropriate. Examples of
Instruments of Assessment which could be used are as follows:
OUTCOME 1
It is recommended that objective questions are used to cover
Performance Criteria (a) to (c) 14 objective questions could be
used such as multiple choice or grid questions. The questions
could be allocated to the performance criteria as follows:
Performance Criterion
(a)
(b)
(c)
representations of cyclic forms
3
representations of Fischer projections
partial structure of starch and glucose
properties of carbohydrates
3
2
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For performance criterion (d) 2
extended response questions could be set.
Performance Criterion (e) could be assessed by means of an
assignment including the experiment and the necessary
paperwork. A checklist should be devised to ensure the
candidate's completion of the assignment.
Satisfactory performance level within the outcome could be
demonstrated by the candidate achieving at least 4 correct
responses for (a), 4 correct responses for (c) and the full and
correct completion of Performance Criteria (b), (d) and (e).
OUTCOME 2
It is recommended that for Performance Criteria (a) and (c), 2
objective questions are set, and for Performance Criterion (b), 3
extended response questions.
It is recommended that an assignment is set for performance
criterion (d) whereby the candidate will carry out a practical
exercise and a written report of the observations, results and
conclusion. An observation checklist should be used to evidence
the candidate's practical work.
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Unit No. 3181893
Continuation
Session 1993-94
An appropriate performance level for the outcome could be by
the candidate achieving 2 correct responses for Performance
Criteria (a) and (c) and 2 correct responses for Performance
Criterion (b).
OUTCOME 3
It is recommended that objective questions, extended response
questions and an assignment are used. For Performance
Criteria (a) and (b) 4 objective questions could be set. Restricted
response or short answer questions would be suitable.
For Performance Criteria (c) and (d) one extended response
question for each could be used. For Performance Criteria (e)
and (f) an assignment for each could be completed. Within each
the candidate should perform an experiment, record
observations, report results and draw valid conclusions.
Satisfactory performance of the outcome could be demonstrated
by the candidate achieving 3 correct responses for Performance
Criteria (a) and (b), 1 correct response for Performance Criteria
(c) and (d) and the full and correct completion of performance
criteria (e) and (f).
OUTCOME 4
Objective and extended response questions could be used here.
The questions could be allocated to the Performance Criteria as
follows:
Performance Criterion (a) 2 objective questions. Performance
Criterion (b) - 3 extended response questions, 1 on replication, 1
on transcription and 1 on translation.
An appropriate
performance level will be the correct completion of all the
questions to satisfy the evidence requirements.
RECOGNITION
Many SQA NC units are recognised for entry/recruitment
purposes. For up-to-date information see the SQA guide 'Recognised and
Recommended Groupings'.
REFERENCES
1.
2.
3.
4.
Guidelines for Module Writers.
SQA's National Standards for Assessment and Verification.
For a fuller discussion on assessment issues, please refer to SQA's
Guide to Assessment.
Procedures for special needs statements are set out in SQA's guide
'Students with Special Needs'.
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Unit No. 3181893
Continuation
Session 1993-94
 Copyright SQA 1993
Please note that this publication may be reproduced in whole or in part for
educational purposes provided that:
(i)
(ii)
no profit is derived from the reproduction;
if reproduced in part, the source is acknowledged.
9