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The best biology notes for A- level biology : Topic 8

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These notes have taken students from grades D- A* All by learning the following notes. These notes are absolutely necessary for A* wannabes. All slides cover every topic on the AQA specification. Students are simply required to learn the content, and the highlighted information to secure their A* From personal experience: these notes allowed me to achieve an A* at A-levels, whilst being predicted a ‘C ‘ (Try them out!!! I assure you they will be worth the purchase as well as time studying them ) Happy studying, Biology Guru

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Mutations
mutations canhappen
by errors made during
DNA replication


substitution-bases swapped for another
GCTACC GCAACC

Deletion-bases removed
GCTACC GLACC

Addition-base inserted
GCTACC GCTGACd

Duplication-base repeated
GCTACC GCTTACC

reversed
Inversion-sequence GCTCCA
GCTACC


Translocation-sequence moved from one

place to another
(either on same or
different
chromosome)

↳ mutations can
change the amino
acid coded for and therefore
and
change
structure protein
primary of
potentially change tertiary structure
not all mutations result in
acid due
a
change
of amino
nature DNA code
to
deg enerative
of

meshift
mutations mutagenic agents
-

↳ increase rate of
↳ Mutation
all subsequent triplets ,
affected
as
length of DNA changes Dact as a base
deletion addition and duplication ② bases
altering
,




causes
as more
a
larger impact
&



amno acids
on protein
affected
/ Change
structure
DNA
(make
replication harder)

Document information

Study Level
Subject
Uploaded on
June 22, 2024
Number of pages
18
Written in
2023/2024
Type
Class notes
Professor(s)
Whitlock
Contains
Paper 2
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