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IB Biology Topic 2, 7, 8 Notes
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  • Course
  • IB Biology
  • Institution
  • Book
  • Oxford IB Diploma Programme: Biology Course Companion

Detailed notes of everything you need to know for the IB Biology Course. Topics 2,7 and 8 are covered with colourful diagrams and explanations. Also suitable for AP and A Level biology.

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Document information

  • February 28, 2023
  • 66
  • 2022/2023
  • Interview
  • Unknown
  • Unknown

Subjects

  • biology
  • biochemistry
  • dna
  • lipids
  • organic molecules
  • ib biology hl
  • carbohydrates
  • dna replication
  • photosynthesis
  • ib

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Topic 2
Molecular
Biology

, 2.1 Molecules to Metabolism


Molecular
biology explains living processes in terms of chemical substances involved


-

the structure of DNA was discovered in 1953



relationships between genes and the
polypeptides they generate is at the heart of this scienc
-




-DNA makes RNA, RNA makes protein

-

Molecular
biology is the study of the molecular basis of biological activity in cells


Carbon

the 15th most abundant element



forms the backbone of every molecule
-




organic


they form covalent bands and
they very stable
-


a re




-

has I outer electrons


-
the result of these properties is a almost infinite number of diff possible molecules


Carbohydrates
-

Contain (, H and D




organic compound consisting of one or more simple sugars
-




monomers follow the
general basic formula of CH20) x




-monomers are
commonly ring shaped molecules

, Lipids

Contain CM0



that insoluble in water butsoluble in
·group of organic molecules a re non-polar
solvents
organic

Common lipids include triglycerides, phospholipids and steroids
-




the common lipid triglycerides, phospholipids and steroids be
distinguished in molecu
·



can



diagrams




Proteins


Contain C, M, O, N and sometimes s
·




large organic compounds made amino acids
of arranged into
on e or linear chains
·


more




Nucleic Acids

Contain C, H, 0, N, P
-




chairs of
sub-units called nucleotides
-




consist
of base. sugar and phosphate




1

, Molecules to learn

CH, OH




3
R
Cresidue)
H
0
H C5 O & .
=

N c-c
"alpha
H -




2 On C. glucose I -OM
n
M
Y N
OM
L -
NO C
3
22 crino acid

M One group

Hexose-6c amino acid




3
CHcOM

C
O On
H M
beta glucose

'n
C On M
HO
c
C

ON
H


HO




or S
2Hz
O



4
in in ribose
monosaccharide

one

25 M100g




3
H


H com


M con glycerol
H 2 On
Cy4803
H




Sohe his s
O
N
fatty and
C
on
40
crepeating
carboxylic
group
hydrocarbon
tail

CH,(CM2)nCOOM
=0

(My -




(CM)n -
C
Or

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