Avery,MacLeod,and McCarty (1944)demonstrated That DNA Was the Genetic Material by Treating

question 2

Multiple Choice

Avery,MacLeod,and McCarty (1944) demonstrated that DNA was the genetic material by treating heat-killed Streptococcus pneumoniae S (smooth) strain with DNase,thereby preventing transfer of the "transforming substance" from the killed S strain to the live R (rough) strain when the two were mixed together and injected into mice.Another way that one could demonstrate transformation in bacteria would be to extract DNA from

• A)an R strain and mix it with cells of an S strain.
• B)both S and R strains and mix it to allow recombination to take place.
• C)an ampicillin-sensitive strain and mix it with cells of an ampicillin-resistant strain.
• D)an S strain and mix it with cells of an R strain.
• E)None of the above are correct.

---

Definitions:

Disequilibrium Principle

A state or condition where there is a lack of balance or stability, particularly within economic models or physical systems.

Operant Conditioning

A method of learning that occurs through rewards and punishments for behavior, thereby influencing the probability of that behavior being repeated.

Classical Conditioning

An educational method involving the repeated pairing of two stimuli, resulting in a reaction initially provoked by the second stimulus being eventually provoked by the first stimulus.

Secondary Reinforcer

A stimulus that gains its reinforcing power through its association with a primary reinforcer.