Which of the following monomer building blocks is necessary to assemble selectively permeable boundaries around and inside cells?
(a) sugars
(b) fatty acids
(c) amino acids
(d) nucleotides
Answer: B
Which of the following monomer building blocks is necessary to assemble selectively permeable boundaries around and inside cells?
(a) sugars
(b) fatty acids
(c) amino acids
(d) nucleotides
Answer: B