GCSE EDEXCEL TRIPLE SCIENCE
BIOLOGY PAPER 2 2024 - QUESTION
PAPER WITH CORRECT QUESTIONS
AND ANSWERS WITH GRADED A+
,What structures are present in an animal cell
nucleus, cell membrane, mitochondria and ribosomes
What structures are present in a plant cell
nucleus, cell membrane, mitochondria, ribosomes, cell wall,
chloroplasts and a permanent vacuole
What structures are present in a bacteria cell
chromosomal DNA, plasmid DNA, cell membrane, ribosomes and
flagella
What specialisations do sperm cells have
acrosome - contains enzyme end to allow the cell to burrow into the
egg
haploid nucleus - other half is in egg cell
mitochondria - to produce energy to allow the sperm cell to
move/swim to the egg
,tail/flagellum - allows it to move/swim to the egg
What specialisations do egg cells have
Cytoplasm - contains extra nutrients to provide energy for the
development of the embryo
haploid nucleus - other half is in sperm cell
Jelly layer - protect the egg as it moves along and to harden when a
sperm enters to prevent any more from entering
cell membrane - Hardens when a sperm cell enters to prevent any
others from entering
What specialisations do ciliated epithelial cells have
cilia - hair like structures on top of the cells to waft things along
such as an egg in the oviduct or mucus in the airway
mitochondria - provide energy via respiration to move the cilia
Triangle for Image, magnification and Actual
- Image (whats seen in the microscope)
, - actual (the actual size of the object)
- magnification (how much it is magnified by)
I
---
A|M
How much can a light microscope magnify?
x1500
what resolution can a light microscope see at
0.000,1mm
How much can an electron microscope magnify?
x2,000,000
what resolution can an electron microscope see at
0.000,000,2mm
milli means
1,000 1x10³
micro means
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 or Stuvia-credit 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 emilywambura. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
