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Summary A LEVEL Biology Module 2 OCR Revision Notes (Condensed)

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Want to strive for a better grade in biology? Don't leave revisions till the end, and get that A*! Here is an EXTREMELY condensed revision file of ALL module 2 content, and the vital segments you HAVE to know. It covers all the chapters (2-6) for this module and helps link the chapters together within one. DRAWN diagrams and important parts are HIGHLIGHTED and CIRCLED, and notes are based particularly on past exam papers. Clear, structured, and very effective. Tested on multiple peers & students with amazing results! Especially for use for quick revision, main concepts required to know, and any last minute doubts before a quiz. Very useful as key words are shown, and tables/highlighters used for easy revision. Enjoy!

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Uploaded on
September 4, 2024
Number of pages
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Written in
2024/2025
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Any X
CH 2 :
BASIC COMPONENTS OF LIVING SYSTEMS means HANGE cabbreviated



MICROSCOPES learn HOW magnification
& Total

~ in Mm .
to calibrate , etc .
e =
eyepiece < objective



I
- image MAGNIFICATION
=
# of times greater that an image is than the actual object

A m

↓ ↓
actual RESOLUTION
magnification
=
ability of a microscope to show 2 objects as SEPARATe !!




I
scanningSE
Transmission
LIGHT CONFOCAL TEM
2D

To form image
uses la ser electrons
light

-




max .
magnific >
-
will be eyepiece
ation lens
X
-
X 1 , 000 ,
000 X 500 , 000
X
1500


max reso ,

higher than 0 5 hm
200nm
.

3 -
10nm
Cdist between light
two objects)

# nigrosin / congo
reach Fluorescent
Colour-crystal Violet
stains dyes , a methylene Dyes metals-lead
bine #D
differential #


staining-bianisms
↳ Hematoxalin
osin
nucleic acid
=

turns blue
=
Pink/red-proteins

living/dead living thick 3D
,
organelles thick
advantages
#
specimen
Ip1 /


low resolution dead-vacumm dead vacumm
disadvantages photodamage cells
,
large structures very thin
Slow Baw
--
cell bu
nucleus

, animal

Revise-what do each do ?

Secretory < normal
cell
ANIMAL
RIBOSOmes OSMOOTH
①microfilaments
actin !!
② microtubules
tubulin !I
also
CENTRIOLES CRNA) s ISS
-

no ribosome

contractile fibres protein syn LIPID& CARB
snape F ② ROUGH
- .
:
QG
-
- -




-
more / contract -
movement -
float freely/RER synthesis ,
CYTOKINESIS SPINDLE FIBRes -
made in nuc .
storage
-
ribosomes
-

protein transport


ER
Intermediate fibres
③ folded mem .




CYTOSKELETOR -
mechanical strength
PROTEIN ! ↳ hollow
tubes CISTERNAe
present in cytoplasm
PRODUCTION
-




-
Keep / Shape
made of PROTEIN ORGANS
!
-




!
GOLGI APPARATUS
-
stacked flattened
Cisterne SER
sortn package
CELL PLASMA
-




proteins



Q
membrane -
receive/produce
-

differentially vesicles
permeable
-
movement of
solutes

CytoPlasm MITOCHONDRIA
NUCLEAR CILIA
NUCLEOLUS
-
water
aerobic respiration FLAgELLA
ENVELOPE
-



-
solutes Whip mobile &
folded inner ↑SA

mi
-


cx2mem) - Stationary





enclose membrane
& protect DNA CTRACHEC)
synexte .





NUCLEUS
CDNA molecules
LORISTAC
protein Synthesis
=
lysosomes
>
-
pigment grana
CELL kill Body
I

chloroplasts
Gu STRUCTURE - contain enzymes
to break down

Photosyn .
food molecules ,

> thylakoids
-

double cell wasted
(e)
membrane O +
worn out
-
make owN proteins , = stroma
break down
DNA ribosomes
-



,

PATHOgenS PLANT
Clite mito)




CELL WALL
-
Cellulose
microfibrils
-

freely per
DHYSICAL protect
-




pathogen
VACUOLES
-

prevent HYPOTONIC -
membrane
-

turgor pressure lighed sacs
W SAP
-


permanent D
small & transient
*



in animal

= large/turgor
membrane - tonoplast




PLANT
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