Summary
Summary Topic 1: Cell Structure Notes
- Module
- Unit 1 - A Cell Structure
- Institution
- CIE
Hand-made digital notes and diagrams on the entirety of Cell Structure Topic written spec-by-spec point to ensure all content is covered
[Show more]
Seller
Follow
Content preview
1. Cell structure1. 1 The
:
Microscope in Ceu studies
calculate
magnifications of images and annual sizes
of specimens from drawings photomicrographs and
,
neuron
micrograph
.
Magnification = measured
length
actual size = measured
length
scale bar label
Magnification
| If / |
Unit Abbr .
Metric
Equivalent
Kilometer km 1,000m 103m
In
cent ,miner
.
can
I:m In
o.am , ozm
6m
-
micrometer µm 0.000001m 10
"
nanometer nm 0.000000001m 15 m
Define resolution and magnification and explain the differences between these terms , with
reference to hjwr
microscopy and electron microscopy
Magnification
Magnification is how
many
times
bigger
the
image of specimen
a observed is in
comparison to the actual size
of the
specimen
.
A
light microscope has two types of hens :
lens
→
eyepiece
↳ fixed at ✗ to
magnification
→ Objective lenses
↳ ✗ 4 ✗ 10 ✗ 40
, ,
] ✗these numbers to workout
total
magnification
Resolution
→ the to
distinguish two separate points
ability
The resolution
of light muioswpe is limited by the wavelength of light
a
↳ as light passes through the specimen it is diffracted
↳ the longer the wavelength the more diffraction
higher resolution and magnification
Electron have much
microscopes a
↳ much smaller wavelength than visible light
↳ can be much closer before diffracted beams
overlap
, 1.2 cells : as the basic units
of living organisms
Recognise organelles and other cell sometimes
found in eukaryotic cells and outline their structures and functions limited to :
cell Membrane
surface
exchange of
→ controls the materials between the internal an environment and the external environment
' '
→ partially permeable
→ formed from a
phospholipid bilayer of phospholipids
Cen Wan
structural
provide
→ to the an
support
→ made of cellulose in plants
bacterium
peptidoglycan in
→ narrow threads
of plasmodesmata convert the cytoplasm of neighbouring plant aus
Nucleus
→ cell
containing chromatin C complex of DNA and histone
provins)
a
↳
generic
mavenin
if the an
in an
→ present eukaryotic
cars
→ double membrane lnuueur envelope) separates it
from the agwpnasm .
→
Nalleur
pores allow mRNA and ribosomes out
of the nucleus
(Dna into the nucleus
enzymes polymerase)
Mitochondria
→ site
of aerobic respiration in
eukaryotic cues
→ matrix contains
enzymes
needed
for aerobic respiration
→ small curium
pieces of DNA found in matrix
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller danwilliams3066. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now