Which element besides carbon, hydrogen and oxygen makes up the most mass of plants?
A) nitrogen
B) helium
C) molybdenum
D) iron
E) phosphorus
Question 2
Cellulose and starch are similar to each other in that they both
A) are made of a patchwork of crisscrossing long chains.
B) are polymers of glucose.
C) are in the formation of alpha helices.
D) contain periodic branching of the polymer chain.