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This is part of the chemistry of life chapter.

Its important to Biology because :

Water is the medium of life and biology is the study of life.

Water molecules are polar. this means t...

Model Answer: this is because enzymes are a protein with a specific tertiary structure which have an active site that is complementary to the substrate (in this case the amino acids of a protein) ultimate...

There are several facts that could prove that mitochondria and plastids - eukaryotic organella descend from prokaryotic organisms. One of the arguments is that the metioned organella posses their own DNA ...

Physical barriers:

• skin to prevent entry of organisms into the bloodstream

• cilia lining the nasal passages / bronchi to prevent entry to lungs / remove mucus 

...

The most serious of these mutations will be the insertion of 2 bases. Becasue the genetic code is read in triplets, a 2 base insetion will alter the reading frame of the code causing a frameshift mutation...