Which scientist(s) identified the transforming substance involved in changing harmless (R) bacteria to lethal (S)
bacteria?
a. Avery and McCarty
b. Griffith
c. Chargaff
d. Hershey and Chase
e. Pauling
ANSWER: a
You might also like to view...
A closed-circular DNA in its relaxed form has a linking number (Lk) of 500 . What will happen to the linking number of this molecule if the DNA is denatured by heat?
A. Lk will increase. B. Lk will decrease. C. Lk will stay the same. D. Lk becomes undefined. E. None of these choices is correct.
Which of the following is not a level of organization in the vertebrate body?
A. Bones B. Organ systems C. Tissues D. Cells E. Organs
If all the offspring of a cross had the genotype Aa Bb, the parents of the cross would most likely be
a. AA BB ? aa bb. b. AA bb ? aa BB. c. Aa Bb ? Aa Bb. d. Aa bb ? aa Bb. e. both AA BB ? aa bb and AA bb ? aa BB.
In a cross between a true-breeding plant bearing smooth, yellow seeds and a true-breeding plant with
wrinkled, green seeds, the offspring were all smooth and yellow. What is the genotype of the F1 plants? A. SSYY B. ssyy C. SsYy D. ssYY E. SSyy