100% correct answers only i cannot retake this.

which of these is a segment of dna that contains the information necessary to produce a protein?

a. a base
b. a gene
c. a codon
d. a chromosome

What is called the "building block" of life?

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

Do plant cells perform cellular respiration?