What two bases in the DNA molecule are double-ringed?
A) Guanine and cytosine
B) Thymine and cytosine
C) Uracil and guanine
D) Guanine and adenine
E) Thymine and uracil
D
You might also like to view...
Photosynthetic pigments in bacteria are located in the:
A. nuclei. B. plasma membrane. C. chloroplasts. D. cell wall. E. plasmids.
The apicomplexan parasite Plasmodium infects cells
of which of the following? a. blood b. liver c. brain d. both blood and liver e. blood, liver, and brain
Which of the following is NOT true of proteins?
a. They determine the structure and function of cells and tissues. b. They function as receptors. c. They function in recognition. d. They are the code for molecules that are important for life processes. e. They enable cells to communicate.
Refer to the accompanying figure. The allantois is identified by number:a
1. b. 2. c. 3. d. 4. e. 5.