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
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
