Discuss how the initiation of DNA synthesis occurs in bacteria using the terms origin of replication, replication fork, and theta structures
What will be an ideal response?
Answer: The initiation protein DnaA binds to the origin of replication (oriC gene) where DnaB and DnaC proteins help unwind the DNA. This unwound and accessible region of DNA, called the replication fork, is where DNA synthesis occurs. Theta structures are used to describe the appearance of the DNA replication during bidirectional circular DNA replication.
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Which of the following is not a tenet of the cell theory?
A) All organisms consist of one or more cells. B) All cells arise from preexisting cells. C) The cell is the basic unit of structure for all organisms. D) All cells have a membrane-bound nucleus. E) none of the above
Which of the following is not soluble in water?
A) lipids B) sugars C) amino acids D) disaccharides E) nucleic acids
How many different amino acids are found in humans?
a. 4 b. 8 c. 12 d. 16 e. 20
The spontaneous generation theory of disease was replaced by identifying microorganisms as the cause diseases
a. true b. false