Which of the following statements regarding transcription and translation is true?
A. mRNA includes the bases A, C, G, and T.
B. A codon consists of a sequence of two nucleotides.
C. A tRNA molecule includes a codon sequence and carries a single amino acid.
D. An RNA transcript may contain sections that are removed before translation.
Answer: D
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Which determines the geographic distribution of biomes?
A. climate B. dominant animal type C. dominant plant type D. scientific importance
Which of the following atmospheric layers is the thickest?
A. the layer bounded by 1001 hPa and 1010 hPa B. the layer bounded by 1 hPa and 10 hPa C. the layer bounded by 500 hPa and 550 hPa D. the layer bounded by 101 hPa and 110 hPa
As meteors enter the Earth's atmosphere, large numbers are slowed by air resistance and may reach the ground as smaller fragments called meteorites.
Answer the following statement true (T) or false (F)
Long tongues of ice which surround the margin of mountain ice sheets are called ________
A) periglacials B) nunataks C) névé D) outlet glaciers E) proglacial glaciers