Short Answer
The DNA of virtually every cell is underwound (i.e., negatively supercoiled) relative to B-form DNA. In bacteria, an enzyme called (a) _____ introduces negative supertwists into DNA using (b) _____ as a source of energy. This enzyme is classified as a type (c) _____, which affects the linking number in steps of (d) _____. The usual substrate for this enzyme within an E. coli cell is the bacterial chromosome. This circular DNA molecule of 4,700,000 base pairs has a linking number of approximately (e) _____ when it is closed and relaxed. This enzyme would (f) _____ (decrease/increase/not change) this linking number when acting upon this DNA molecule in the presence of the above energy source.
Correct Answer:
Answered by ExamLex AI
Correct Answer:
Answered by ExamLex AI
Q1: If negatively supercoiled plasmid DNA is mixed
Q3: The fundamental repeating unit of organization in
Q4: The DNA in a bacterial (prokaryotic) chromosome
Q5: The chromosomal region that is the point
Q6: Heterochromatin is NOT associated with:<br>A) histone H1.<br>B)
Q7: B-DNA has 10.5 base pairs per turn,
Q8: Which statement does NOT apply to the
Q9: Which statement is FALSE?<br>A) Histones are very
Q10: If a plasmid has 11,025 base pairs
Q11: When plasmid DNA is purified from E.