D! The Cell membrane in found in all cells, and it is a single (mono) layer.
The answer that best fits the description above is the hormone GLUCOCORTICOID. This was according to Hans Selye, an Austrian-Canadian endocrinologist. According to him, ill health induced by exposure of chronic stress is due to the secretion of the hormone glucocorticoid.
It is Nucleic Acids, they consist of long chains of units like the proteins, but still both are different.
The time of the revival of learning is such as the Bible, art, and true science is called the "Renaissance." You forgot to include the Bible in your quesiton.
Answer: Renaissance
sad!; live