BIO210 Questions with CORRECT Answers (Grade A+)

BIO 210 (2) Questions with CORRECT Answers


Question:
What did Lenski's experiment illustrate about E. coli?
Answer:
The evolution of E. coli over 75 days, showing increased fitness in fresh nutrient
conditions.

Question:
What did Luria & Delbruck's experiments show about bacterial resistance?
Answer:
That variable resistance to phage infection arises without selective pressure.

Question:
What is the significance of paired ends in restriction enzyme activity?
Answer:
They can be ligated together by DNA ligase after being cut.

Question:
What does the X-gal system do in cloning?
Answer:
It allows visual identification of colonies with plasmid inserts (white colonies)
versus those without (blue colonies).

Question:
What is triparental conjugation?
Answer:
A process where a recombinant plasmid lacking the tra gene conjugates with a
helper plasmid that has the tra gene.

Question:
What is an infectious disease?
Answer:
A disease transmitted from host to host, such as influenza or HIV.