Genetic information in DNA and RNA is stored as a sequence of three nucleotide bases. On DNA a group of three nucleotides is called a _____, while on the complementary strand of mRNA, this sequence is called a ____ .
a) genome / proteome b) intron / exon c) base triplet / codon d) codon / anticodon e) base triplet / anticodon
d) codon / anticodon
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Photoautotrophs use light energy directly for
A. the reduction of carbon dioxide to glucose. B. the production of ATP and NADPH. C. both the production of ATP and NADPH and the reduction of carbon dioxide to glucose. D. neither the production of ATP and NADPH nor the reduction of carbon dioxide to glucose.
During which phase in the cell cycle does mitosis happen?
A) G1 phase B) G2 phase C) M phase D) S phase
Microbes known as transient microbiota are
A) microorganisms that remain with the person throughout life. B) microorganisms that may cause a disease under certain circumstances. C) organisms that remain in the body for a short time. D) unsuccessful microbial invaders because of the presence of preexisting microbes. E) sources of microbial contamination.
Among the microorganisms, various genomes can include
A. mitochondrial DNA. B. plasmids. C. chloroplast DNA. D. chromosomes. E. All of these choices are correct.