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MCQ in an important experiment, bacteriophages were allowed to infect bacteria. in the first trial, the phages used contained radioactive DNA, and radioactivity was detected in the bacteria. next, other phages containing radioactive protein were allowed to infect bacteria, and no radioactivity was detected in the bacteria. when the experimenters compared the results of these two trials, they concluded that:a. genes are made of DNAb. bacteriophages can infect bacteriac. DNA is made of nucleotidesd. genes carry information for making proteinse. genes are on chromosomes

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MCQa sequence of pictures of polypeptide synthesis shows a ribosome holding two transfer RNAs. one tRNA has a polypeptide chain attached to it; the other tRNA has a single amino acid attached to it. what does the next picture show?a. the polypeptide chain moves over and bonds to the single amino acidb. the tRNA with the amino acid leaves the ribosomec. the amino acid moves over and bonds to the polypeptide chaind. the tRNA with the polypeptide chain leaves the ribosomee. a third tRNA with an amino acid joins the pair on the ribosome

MCQhow do retroviruses, such as HIV, differ from other viruses:a. they are much simpler than other virusesb. they contain DNA that is used as a template to make RNAc. they can reproduce only inside of living cellsd. they contain nucleic acids that code for the making of proteinse. they contain RNA that is used as a template to make DNA

MCQwhich of the following are arranged in the correct order by size, from largest to smallest:a. chromosome-gene-codon-nucleotideb. nucleotide-chromosome-gene-codonc. codon-chromosome-gene-nucleotided. gene-chromosome-codon-nucleotidee. chromosome-gene-nucleotide-codon

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