9. If an amino acid substitution occurred in a polypeptide chain, predict which option would have the most significant
impact on the structure and function of the final protein? Why?
a. Serine is replaced by glutamate
b. Alanine is replaced by lysine
c. Glycine is replaced by valine

The body is protected against harmful flu viruses by

What name is given to the process in which a strand of dna is used as a template for the manufacture of a strand of pre-mrna?

Some species of hummingbirds have different shapes of beaks that evolved to allow them to drink from certain flowers. the flower species have evolved to produce nectar that is tasty for the hummingbirds. this example is a type of . cuckoos lay eggs in the nests of other birds. the cuckoo lays eggs identical to the eggs of the host species, so the other bird takes care of it. this is an example of .