Question

complete the table to compare the structures of a lipid and dna.
lipid dna
has hydrogen bonds between nitrogenous bases
has two strands of nucleotides joined together
forms a double helix

Explanation:

• Lipids are not composed of nucleotides and do not have nitrogenous bases. So, for "Has hydrogen bonds between nitrogenous bases", lipid has no (not applicable as it's not made of such components), while DNA has (adenine - thymine and cytosine - guanine pairs have hydrogen bonds).
• Lipids are not made of nucleotides. DNA is a nucleic acid made of nucleotides and has two strands (double - stranded). So, for "Has two strands of nucleotides joined together", lipid has no, DNA has yes.
• Lipids do not form a double - helix structure. DNA is famous for its double - helix structure. So, for "Forms a double helix", lipid has no, DNA has yes.

Answer:

	Lipid	DNA
Has two strands of nucleotides joined together	No	Yes
Forms a double helix	No	Yes