Which base-pairing system is correct?
A. A to G; T to C
B. A to T; G to C
C. A to C; G to T
D. A to T or C; G to C or A
E. A to T or G; G to C or A
Answer: B
You might also like to view...
Which of the following bacteria is both photosynthetic and Gram-positive?
A. Purple bacteria B. Cyanobacteria C. Heliobacteria D. Green bacteria E. None of the choices are correct.
What is an assumption of group selection?
A. infanticide B. lack of immigration C. no natural selection D. high rates of mutation E. resource prediction
The exchange of oxygen and carbon dioxide occurs in the human lungs in the ____
a. bronchi b. alveoli c. bronchioles d. trachea e. glottis
Does a woman ovulate during pregnancy? Why or why not?
A. No, because the developing embryo prevents any new blastulas from implanting. B. Yes, because the ovarian cycle continues to function. C. No, because she doesn't have any more follicles in the ovaries. D. No, because negative feedback on the hypothalamus prevents new follicles from maturing. E. Yes, because the uterine cycle continues to function.