PLEASE HELL Read the passage.

To write Sir Isaac Newton’s biography, the historian had to do a great deal of research. She needed to collect a lot of documents to write about important moments in the scientist’s life.

The word root bio means life. What is the best definition for biography as it is used in the passage?

a story about a person’s life
a book written by a living scientist
a series of live interviews of a famous person
a work about what life was like for people long ago

1. which of the following levels of protein organization shows the complete 3-d arrangement of the polypeptide chain? a) primary b) secondary c) tertiary d) quaternary 2. the carboxyl groups on a protein molecule are composed of which of the following elements? a) nitrogen and hydrogen b) carbon, hydrogen, and oxygen c) carbon and hydrogen d) nitrogen, oxygen, and carbon 3. what part of the protein molecule makes it unique from other proteins? a) the carboxyl group b) the amino group c) the peptide group d) the r group 4. which of the following is an example of a protein that plays a direct role in immune function? a) collagen b) antibodies c) enzymes d) hormones 5. which of the following statements correctly describes the composition of proteins? a) most are composed of 20 common amino acids. b) most are composed of 10 common amino acids. c) most are composed of 20 common fatty acids. d) most are composed of 10 common fatty acids.