genetics/ bio 1 - shawn3387

[ArchivalUser]

19. Which of the following statements correctly describes eukaryotic
nuclear chromosomal DNA?
a. Each discontinuous piece making up the chromosomes of eukaryotes is about
the same size as each prokaryotic chromosome
b. Unlike bacterial DNA, no histones are associated with it
c. It is not replicated semiconservatively
d. It is a linear and unbranched molecule
e. It is not associated with a specific membranous organelle

[ArchivalUser]

d...?

[ArchivalUser]

The answer is d. (Murray, pp 412“434. Scriver, pp 3“45. Sack, pp
3“29. Wilson, pp 99“121.) Like bacterial DNA, eukaryotic DNA is replicated
in a semiconservative manner. However, in contrast to most bacterial DNA,
which is circular in structure, nuclear chromosomal DNA is a single, uninterrupted
molecule that is linear and unbranched. A eukaryotic chromosome
contains a strand of DNA at least 100 times as large as the DNA
molecules found in prokaryotes. Eukaryotic, but not prokaryotic, DNA
molecules are bound to small basic proteins called histones. The histone-
DNA complex formed is referred to as chromatin