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A LEVEL BIOLOGY
why do specimens need to be thin when observing them under a light microscope?
to allow light to pass through

why is the structure of the plasma membrane often referred to as the fluid mo
identify and explain the starch test
add iodine dissolved in potassium iodide solution to the sample
- positive test = blue-black
- negative test = orange-brown

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BIOCHEM
All amino acids contain a central carbon, a side chain (R group), an amino group and a __________ group.
Carboxyl


Amino acids can undergo a proton transfer, thus giving both a (+) and (-) charge. This molecular state is called the ________.
Zwitterion


Amino acid that are unable to be synthesised from biochemical pathways within a cell have to b
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