Chargaff found several facts about the base composition of DNA. One of these rules is
a. There is a 1:1 relationship between G and T.
b. There is a 2:1 relationship between purines and pyrimidines.
c. The amount of A equals the amount of T.
d. The amount of purines is half the amount of pyrimidines.
e. None of these are true.
Ans: c. The amount of A equals the amount of T.
You might also like to view...
Which of the following is not a photosynthetic pigment?
A. Phycobilin B. Carotenoid C. Leukophyll D. Chlorophyll
Females almost always have a lower parental investment than males
Indicate whether the statement is true or false.
This chapter discussed speciation by genetic divergence following geographic isolation, which is expected to lead to reduced gene flow, a process known as allopatric speciation
A more controversial form of speciation is the genetic divergence of populations without physical isolation, a process known as sympatric speciation. Can you envision a mechanism or process that would permit two coexisting populations of the same species to begin to diverge without being isolated from one another?
Bryophytes have all of the following characteristics except
A) multicellularity. B) specialized cells and tissues. C) lignified vascular tissue. D) walled spores in sporangia. E) a reduced, dependent sporophyte.