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Cards In This Set
| Front | Back |
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Ribosomes function as
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2-part units
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Each codon calls for a specific
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Amino acid
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Anticodons pair with _____.
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MRNA codons
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Cell differentiation _____ .
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A. occurs in all complex multicelled organisms
b. requires different genes in different cells c. involves selective gene expression d. both a and c e. all of the above |
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Molecules that interact with DNA to alter gene expression are
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Regulatory proteins
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In negative control systems, which of the following would cause transcription to proceed?
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Inducer
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A regulator gene produces which of the following?
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Repressor protein
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The expression of a given gene depends on the _____.
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A. type of cell and its functions
b. chemical conditions c. environmental signals d. all of the above |
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Regulatory proteins interact with _____.
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A. DNA
b. RNA c. gene products d. all of the above |
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The lactose operon includes
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An operator, 3 structural genes that manufacture lactose-metabolizing enzymes, and a promoter
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The obvious advantage of the lactose operon system is that
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Lactose-metabolizing enzymes need not be made when lactose is not present
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The positive control of the lactose operon in bacteria is
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Activated by a protein known as CAP
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A base sequence signalilng the start of a gene is a(n) _____.
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Promoter
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In prokaryotic cells but not eukaryotic cells, a(n) _____ precedes the genes of an operon .
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Operator
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An operator most typically governs _____ .
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Bacterial genes
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