When John Cairns First Visualized the Replication of E

question 22

Multiple Choice

When John Cairns first visualized the replication of E.coli chromosomes in 1963 what did he conclude? 1.The chromosomes of E.coli are circular structures that exist as u-shaped intermediates during replication.
2) The unwinding of the two complementary parental strands and their semiconservative replication occur simultaneously or are closely coupled.
3) Semiconservative replication of the E.coli chromosome started at a specific site,and proceeded sequentially and unidirectionally around the circular structure

• A) 1
• B) 2
• C) 3
• D) 1 and 2
• E) All of these

---

Definitions:

Quantitative Models

Mathematical or statistical models used to represent reality, predict outcomes, or explain relationships among variables.

Historical Data

Information collected from past events and circumstances, used as a reference or for analysis to plan for future activities.

Significant Transition

A major change or shift in an organization, situation, or individual's life or career path.

Structural Equation Modelling

A method of statistical analysis that examines the relationship between observed variables and underlying constructs.