All Are True for Linking Number EXCEPT

question 6

Multiple Choice

All are true for linking number EXCEPT:

• A) It is a basic parameter characterizing supercoiled DNA.
• B) L = T + W.
• C) It is the number of times that two strands are intertwined providing both strands remain covalently intact.
• D) L = 40 in a relaxed circular DNA duplex of 400 bp.
• E) All are true.

---

Definitions:

Placebo Control Group

In a therapy outcome study, group of people whose treatment is an inactive substance (to compare with the effects of a drug) or a nontheory-based therapy providing social support (to compare with the effects of psychotherapy).

Ethical Problem

A situation that requires a person to choose between alternatives that must be evaluated as right (ethical) or wrong (unethical).

Withholding Treatment

The ethical and medical decision not to administer a specific medical treatment to a patient, often under circumstances where the treatment will not improve quality of life or extend it in a meaningful way.

Demand Characteristics

Factors in an experiment that suggest to participants how the experimenter would like them to behave.