Question

question 19 1 pts prostaglandins and steroids share which of the following characteristics? both are found in the cell membrane. both have a ring structure in their molecule. both have a saturated fat in their structure. none of the above are shared characteristics. question 20 1 pts dna: is a single strand of nucleotides. contains the sugar ribose. is a double - helix strand of nucleotides. transports amino acids during protein synthesis.

Explanation:

• For Question 19: Prostaglandins are lipid - based molecules and steroids are a class of lipids with a characteristic four - ring structure. Prostaglandins do not have saturated fats in their structure and are not mainly found in the cell membrane like some other lipids.
• For Question 20: DNA is a double - helix strand of nucleotides. RNA can be single - stranded, ribose is in RNA, and tRNA transports amino acids during protein synthesis.

Answer:

Question 19: Both have a ring structure in their molecule.
Question 20: is a double - helix strand of nucleotides.