Problem:
Question 1: A carbon atom of mass number 12 and a carbon atom of mass number 14 are
A) covalent
B) compounds
C) isotopes
D) ions
Question 2: This polysaccharide forms fibers that are a major component of plant cell walls:
A) glucose
B) starch
C) cellulose
D) glycogen
Include source of information for best answer.