The DNA double helix is composed of two strands of DNA; each strand is a polymer of DNA nucleotides. Each nucleotide consists of a sugar, a phosphate group, and one of four nitrogenous bases. The structure and orientation of the two strands are important to understanding DNA replication. a) 5' end
b) hydrogen bond
c) 3' end
d) deoxyribose sugar
e) nitrogenous base
f) phosphate group
g) 3' end
h) 5' end

The new DNA will grow from 3' to 5' called leading strand.

Explanation:

The DNA often react in leading strand. These are parent strand of DNA which runs in 3' to 5' towards a fork like shape. They continuously replicate in order to form DNA replication fork by DNA polymerase. The leading strand moves in same direction towards the fork.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.