The monomer units of DNA are nucleotides. Each of these consist of  a 5-carbon sugar which is deoxyribose, a nitrogen containing base  attached to the sugar and a phosphate â¦ group. Judy Olmsted. 78,524 Contributions. Retired college science professor. DNA is a nucleic acid. Nucleic acids are polymers of nucleotides (also called mononucleotides).   The nucleotides in DNA are deoxyribonucleotides.   Each nucleotid â¦ e consists of a pentose (5-carbon) sugar, a nitrogen-containing base and a phosphate group.
The sclera (from the Greek skleros, meaning hard), also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the eye containing collagen and elastic fiber.he sclera forms the posterior five-sixths of the connective tissue coat of the globe. It is continuous with the dura mater and the cornea, and maintains the shape of the globe, offering resistance to internal and external forces, and provides an attachment for the extraocular muscle insertions.
See an eye doctor: As we age the clear tissue that covers the sclera is exposed to the environment and like the rest of our body undergoes aging changes. These changes include pigmentary changes, increase in size of blood vessels, and slight darkening of the conjunctiva when compared to the part of eye under the lids.he sclera is the white hard covering of the eye. It creates the actual eye ball and is made out of dense connective tissue. The conjunctiva is a thin, clear covering to the sclera.