The two molecules that alternate to form the backbone of a polynucleotide chain are:a
adenine and thymine.
b. cytosine and guanine.
c. sugar and phosphate.
d. base and sugar.
e. base and phosphate
c
You might also like to view...
Which of the following statements about tRNA is FALSE?
A. tRNAs of both eukaryotes and prokaryotes share common features. B. The two-dimensional structure of tRNAs exhibits a cloverleaf pattern. C. tRNAs are produced in the nucleus. D. functional tRNAs have been spliced by splicesomes. E. tRNAs possess an anticodon complementary to the codon.
An animal cell placed in a hypertonic solution will swell and perhaps burst
Indicate whether the statement is true or false.
A population grows as long as its ____
a. total fertility rate exceeds the replacement fertility rate b. replacement fertility rate exceeds the total fertility rate c. total fertility rate equals the replacement rate d. total fertility rate is at least twice the replacement fertility rate e. total fertility rate falls below the average replacement fertility rate
Archaea that are halophiles live in
A. extremely hot environments. B. extremely cold environments. C. extremely salty environments. D. extremely acid environments.