The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858
A. cytosine.
B. uracil.
C. adenine.
D. thymine.
E. guanine.
D
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While documenting the synthesis and function of a eukaryotic gene, you prepare two solutions in which you are able to observe the gene being transcribed. Before the process is complete, you add a significant quantity of ?-amanitin to one solution, and compare the results after a few minutes. You find that the DNA in both solutions has been completely transcribed. What conclusion do you draw?
a. The gene is transcribed by RNA polymerase III. b. The gene is transcribed by RNA polymerase II. c. The gene is transcribed by RNA polymerase I. d. ?-amanitin has no effect on DNA transcription.
The female gametophyte is the ____
a. pollen b. ovule c. embryo sac d. endosperm e. ovary
The process of going from transcription to translation
a. explains the structural complexity of genes. b. describes the flow of genetic information. c. is based upon the role of proteins in controlling life. d. does not explain how genes function. e. explains evolution in terms of molecular biology.
PKU can be detected by
a. prenatal karyotyping. b. urine analysis at birth. c. blood tests at birth. d. saliva tests. e. both urine analysis and blood tests at birth.