2023 AQA Alevel BIOLOGY 7402/3 Paper 3 Question Paper & Mark scheme (Merged)|| newest 2024
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2023 AQA Alevel BIOLOGY
Institution
2023 AQA Alevel BIOLOGY
2023 AQA Alevel
BIOLOGY
7402/3 Paper 3
Question Paper
& Mark scheme
(Merged)||
newest 2024
What type of theory can cell theory be described as?
ANSWERA unifying concept
What is a unifying concpet? ANSWERA concept
that is universally accepted among the scientific
community
What are the t...
2023 AQA A-
level BIOLOGY
7402/3 Paper 3
Question Paper
& Mark scheme
(Merged)||
newest 2024
,What type of theory can cell theory be described as?
✔✔✔ANSWER➖A unifying concept
What is a unifying concpet? ✔✔✔ANSWER➖A concept
that is universally accepted among the scientific
community
What are the three main ideas that Cell Theory states?
✔✔✔ANSWER➖- All living organisms are made up of
one or more cells
-Cells are the basic functional unit
- New cells are produced from pre-existing cells
Describe what is meant by this statement: "Cells are the
basic functional unit" ✔✔✔ANSWER➖That cells are the
basic unit of structure and organization within an
organism
Name sub-cellular structures that compose the structure of
Eukaryotic Cells ✔✔✔ANSWER➖Cell Surface
Membrane
Cell wall
Mitochondria
What are all cells surrounded by? ✔✔✔ANSWER➖a
cell surface membrane
What is the function of the plasma membrane?
✔✔✔ANSWER➖To control the exchange of materials
between the internal and external environment of the cell
What is the plasma membrane formed from?
✔✔✔ANSWER➖phospholipid bilayer
, What is a phospholipid? ✔✔✔ANSWER➖It is a lipid
that has a phosphate group attached to the glycerol and
only two fatty acid chains.
Estimate the diameter of the phospholipid bilayer of the
cell surface membrane ✔✔✔ANSWER➖~10nm in
diameter
What term can be used to describe the plasmsa membrane
✔✔✔ANSWER➖partially permeable
Define partially permeable ✔✔✔ANSWER membrane
that allows some substances to cross but not others ➖.
Where are cell walls formed? ✔✔✔ANSWER➖Outside
the cell surface membrane
What is the function of the cell wall? ✔✔✔ANSWER➖A
rigid layer that supports the cell and provides shape while
simultaneously providing protection
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