An organism's genes are contained in which part of each cell?
The cell membrane
Prokaryotic cells contain…
All of the above
There are 46 chromosomes (23 PAIRS) in human body cells which contain…
energy from respiration
the DNA and genes of a human
the organelles required for respiration
Which of these statements about bacteria is false?
Bacteria are all single-celled organisms
Bacteria have a nucleus
Bacteria have a cell membrane
Bacteria have a cell wall
Which is the correct equation for magnification?
Magnification = size of image / real size of object
Magnification = real size of object / size of image
Magnification = real size of object x size of image
Which type of microscope has a higher resolution?
A light microscope
An electron scanning microscope
Transport in cells
Which gases move by diffusion into and out of plant leaves?
Carbon dioxide and argon
Carbon dioxide and oxygen
Oxygen and argon
Potassium and nitrates
Where does osmosis take place in plant cells?
How are the three pairs of external gills on this Axolotl adapted to maximise exchange of gases?
They are thin and have a small surface area
They are thin and have a large surface area
When cells divide for the purpose of growth and repair, the process is called…
Which type of cell, as a result of being unspecialised, offers the chance to treat some illnesses?
Stem cells harvested from embryos are controversial because…
the research into stem cells has little practical use, and so not a good use of money
the research into stem cells involves doing experiments on adults
many believe that these embryos are alive and so their use in research is immoral
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