As DNA is always double-stranded, RNA is always single-stranded
Indicate whether this statement is true or false.
FALSE
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Who proposed that the structure of DNA is a double helix with two polynucleotide chains running in opposite directions and held together by hydrogen bonding between pairs of nitrogenous bases?
A. Hershey and Chase B. Chargaff C. Franklin D. Watson and Crick E. Meselson and Stahl
In viruses, genetic information flows from ________ to ________
A) RNA / virion B) nucleic acid / protein C) capsid / virion D) DNA / protein
In A. thaliana, genes encoding proteins involved in secondary cell wall development are regulated by an average of
five different ____.
a. tissues b. lignins c. transcription factors d. ribosomes e. genes
Which statement about mosses is true?
a. Mosses are sensitive to air pollution. b. Mosses are a seedless vascular plant. c. Mosses display jointed stems and leaves. d. Mosses develop deep rhizoids in the tundra.