Download Scheme of work for Chapter 7, Nucleic acids and proteins

Cambridge Biology for the IB Diploma
Scheme of work for Chapter 7, Nucleic acids and proteins
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7.1
DNA
structure
1–2
lessons
 Recall the structure of
DNA and extend the detail
to include descriptions of
antiparallel strands, 3'–5'
linkages and hydrogen
bonding; describe the
structure of nucleosomes
and their importance in
supercoiling
p170–172
Extension:
Q2
Practical activity:
modelling of
DNA structure
 Distinguish between
unique and repetitive
sequences in DNA and
state the difference
between exons and introns
7.2
7.3
DNA
replication
Transcription
2 lessons
2 lessons
Shortanswer Qs
p172
Support:
Q1, Q2
TOK p172
Exemplar exam
questions: MCQs
End-ofchapter Qs
p189–193:
Q1, Q2, Q10
 Explain the process of
DNA replication and the
role of enzymes and
formation of Okazaki
fragments; state that
replication occurs in a 5'–
3' direction and is initiated
at many points in
eukaryotes
p173–175
 Explain the process of
transcription in
prokaryotes including the
roles of the promoter
region, RNA polymerase,
nucleoside triphosphates
and the terminator; state
that transcription occurs in
a 5'–3' direction and that
the antisense strand is
transcribed
p175–177
Shortanswer Qs
p175
Link to Chapter 3
Support:
Q2, Q3, Q4
Practical activity:
video clips
Exemplar exam
questions: MCQs
End-ofchapter Qs
p189–193:
Q3
End-ofchapter Qs
p189–193:
Q4
Extension:
Q2, Q3
Practical activity:
video clips
Support: Q5
Exemplar exam
questions: MCQs
Extension:
Q4
Exemplar exam
questions: MCQs
 Introns must be removed
from eukaryotic RNA to
form mature mRNA
7.4
Translation
2 lessons
 Outline the structure of
tRNA and explain that
each tRNA has a specific
activating enzyme that
binds a specific amino
acid; identify the four
stages of translation and
state that it occurs in a 5'–
3' direction
p177–181
Shortanswer Qs
p181
End-ofchapter Qs
p189–193:
Q5, Q8
 Explain the process of
translation including the
roles of ribosomes,
polysomes and start and
stop codons; draw a
peptide bond between two
amino acids and state that
free ribosomes synthesize
protein for use in the cell
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Cambridge Biology for the IB Diploma
7.5
7.6
Proteins
Enzymes
1 lesson
2 lessons
 Explain the four levels of
protein structure; outline
the structure of fibrous and
globular proteins giving
four examples and their
functions; explain the
significance of polar and
non-polar amino acids in
proteins
p182–185
 Describe the induced-fit
model for enzyme action;
explain that enzymes
lower activation energy of
reactions and that
metabolic pathways
consist of chains of
enzyme-catalysed
reactions
p185–189
End-ofchapter Qs
p189–193:
Q6
Extension:
Q1
Practical activity:
3D modelling of
protein structure
Link to ICT:
simulations
Exemplar exam
questions: Q1
Shortanswer Qs
p189
End-ofchapter Qs
p189–193:
Q7, Q9, Q11
 Explain competitive and
non-competitive inhibition
and explain how metabolic
pathways are controlled by
end-product inhibition and
allosteric sites
Extension:
Q5
Support: Q6
Link with
Chapter 3 –
opportunity for
assessed practical
on enzyme
activity
Link to TOK:
development of
induced-fit
hypothesis
Link to ICT: data
logging
Exemplar exam
questions: MCQs
Note: 1 lesson = approximately 40 minutes
Copyright Cambridge University Press 2011. All rights reserved.
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