Cell Biology Exam 1

Which of the following represent the proper flow of information in a cell?

A. RNA is transcribed into DNA which is translated into proteins made of amino acids

B. DNA is transcribed into RNA which is translated into proteins made of nucleic acids

C. DNA is transcribed into RNA which is translated into proteins made of amino acids

D. RNA is translated into DNA which is transcribed into proteins made of nucleic acids

E. DNA is translated into RNA which is transcribed into proteins made of amino acids

C.

In changing from an “RNA world” to a “DNA world” genetic information must have flowed from RNA to DNA. How might this have occured?

a. RNA-DNA hybrids

b. Uracil nitrogenous bases converted to Thymine

c. Reverse transcriptase activity

e. Ribose sugar converted to deoxyribose

f. I do not know

C

C.

B.

C

D

C

B

B

B

C

B

B

B

C

B, C

B

A

E

D

C

A

B, C, D