Chapter 17 Study Module – Flashcards
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Cleavage of a polypeptide into two or more chains
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Which of the following is a post-translational modification of a polypeptide?
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the process by which DNA directs the synthesis of proteins
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Gene expression is __________.
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In prokaryotic cells, the mRNA transcript is immediately available as mRNA without processing.
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What is a key difference in gene expression between eukaryotic and prokaryotic cells?
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nutritional mutants; biochemical pathway
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By bombarding the fungus Neurospora crassa with X-rays, Beadle and Tatum were able to study __________ and characterize enzymes in a __________.
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signal peptide; signal-recognition particle
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In eukaryotic cells, a __________ by a __________ targets a growing peptide to the endoplasmic reticulum.
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ribozymes
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RNA molecules that function as enzymes are called __________.
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At least 1,350
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How many nucleotides are needed to code for a protein with 450 amino acids?
