Given that the nature of DNA replication in eukaryotes is not as well understood as in prokaryotes, (a) present a description of DNA (chromosome) replication as presently viewed in eukaryotes and (b) state the differences known to exist between
prokaryotic and eukaryotic DNA replication.
(a) Eukaryotic DNA is replicated in a manner very similar to that in E. coli: bidirectional, continuous on one strand and discontinuous on the other, and similar requirements for synthesis (four deoxyribonucleoside triphosphates, divalent cation, template, and primer).
(b) Okazaki fragments are about one-tenth the size of those in bacteria. Different portions of the chromosome (euchromatin, heterochromatin) replicate at different times. There are multiple replication origins in eukaryotic chromosomes.
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Plant growth is due to actively dividing cells called:
A. nodes. B. primordial cells. C. meristem cells. D. vascular cells. E. bundle sheath cells.
How is metagenomics applied?
a. Analyzing the environmental impact of pollutants b. Identifying clues from DNA left at crime scenes c. Evaluating the safety and efficacy of medications d. Improving crop breeding to create new hybrids
Body temperature is controlled by a negative feedback control system. The hypothalamus is the ________ for this system
Fill in the blank(s) with correct word
The atrioventricular valves are closed when the
A) right atrium is contracting. B) P wave of an electrocardiogram appears. C) heart is completely relaxed. D) ventricles contract. E) ventricles are relaxed.