AQA Biology Paper 1 Exam Latest 2025
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what is mitosis - CORRECT ANSWER-division of cells for growth and repair
process of mitosis - CORRECT ANSWER-1. nucleus dissolves, genetic material is duplicated
2. two sets of chromosomes more to different sides
, 3. mitochondria and other organelles are duplicated
4. the cell divides producing two genetically identical diploid cells (new nuclei are formed in each)
What can stem cells do and where are they found - CORRECT ANSWER-can specialise to perform
specific functions.
found in human and animal embryos and plant meristems
what can stem cells in bone marrow be specialised into - CORRECT ANSWER-only specialise into blood
cells
advantages of stem cells - CORRECT ANSWER-treat a wide range of diseases
disadvantages of stem cells - CORRECT ANSWER-rejection by the body's immune system
cells can mutate e.g can turn into cancer cells
what can embryonic stem cells do - CORRECT ANSWER-can develop into any type of body cell
ethical issues for embryonic stem cells - CORRECT ANSWER-involves the embryo being destroyed
what's diffusion - CORRECT ANSWER-- movement of particles from an area of high to low
concentration
- down a concentration gradient
Differences between light microscope and electron microscope - CORRECT ANSWER-Light: are cheap
to make and they allow you to see the outline of cells
Electron: Very expensive, however you can visualise finer details (including sub-cellular structures) due
to higher resolution and greater resolving power
Equation for magnification - CORRECT ANSWER-Magnification = image size / real size
With Complete Questions And Verified
Answers(verified by experts)|Already
Graded A+|Assured Success
what is mitosis - CORRECT ANSWER-division of cells for growth and repair
process of mitosis - CORRECT ANSWER-1. nucleus dissolves, genetic material is duplicated
2. two sets of chromosomes more to different sides
, 3. mitochondria and other organelles are duplicated
4. the cell divides producing two genetically identical diploid cells (new nuclei are formed in each)
What can stem cells do and where are they found - CORRECT ANSWER-can specialise to perform
specific functions.
found in human and animal embryos and plant meristems
what can stem cells in bone marrow be specialised into - CORRECT ANSWER-only specialise into blood
cells
advantages of stem cells - CORRECT ANSWER-treat a wide range of diseases
disadvantages of stem cells - CORRECT ANSWER-rejection by the body's immune system
cells can mutate e.g can turn into cancer cells
what can embryonic stem cells do - CORRECT ANSWER-can develop into any type of body cell
ethical issues for embryonic stem cells - CORRECT ANSWER-involves the embryo being destroyed
what's diffusion - CORRECT ANSWER-- movement of particles from an area of high to low
concentration
- down a concentration gradient
Differences between light microscope and electron microscope - CORRECT ANSWER-Light: are cheap
to make and they allow you to see the outline of cells
Electron: Very expensive, however you can visualise finer details (including sub-cellular structures) due
to higher resolution and greater resolving power
Equation for magnification - CORRECT ANSWER-Magnification = image size / real size
