Term
| Ribosomes function as ___ |
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Definition
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Term
| Each codon calls for a specific ___ |
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Definition
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Term
| Anticodons pair with _____. |
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Definition
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Term
Cell differentiation _____ .
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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Definition
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Term
| Molecules that interact with DNA to alter gene expression are |
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Definition
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Term
| In negative control systems, which of the following would cause transcription to proceed? |
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Definition
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Term
| A regulator gene produces which of the following? |
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Definition
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Term
he expression of a given gene depends on the _____.
a. type of cell and its functions
b. chemical conditions
c. environmental signals
d. all of the above |
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Definition
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Term
Regulatory proteins interact with _____.
a. DNA
b. RNA
c. gene products
d. all of the above |
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Definition
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Term
| The lactose operon includes ___ |
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Definition
| an operator, three structural genes that manufacture lactose- metabolizing enzymes, and a promoter |
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Term
| The obvious advantage of the lactose operon system is that ___ |
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Definition
| lactose-metabolizing enzymes need not be made when lactose is not present |
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Term
| The positive control of the lactose operon in bacteria is ___ |
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Definition
| activated by a protein known as CAP |
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Term
| A base sequence signalilng the start of a gene is a(n) _____. |
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Definition
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Term
| In prokaryotic cells but not eukaryotic cells, a(n) _____ precedes the genes of an operon . |
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Definition
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Term
| An operator most typically governs _____ . |
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Definition
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Term
Eukaryotic genes guide _____ .
a. fast short-term activities
b. overall growth
c. development
d. all of the above |
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Definition
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Term
| Which of the following is the region that is the binding site for RNA polymerase? |
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Definition
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Term
| The mosaic effect in human females can be observed in ___ |
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Definition
| distribution of sweat glands |
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Term
| X chromosome inactivation is an example of _____ . |
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Definition
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Term
Hormones may ______ gene transcription in target cells.
a. promote
b. inhibit
c. participate in
d. both a and b |
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Definition
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Term
| The signaling molecule that allows plants to make responses to changing light conditions is ___ |
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Definition
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Term
| The spread of a cancer from one site to others in the body is known as ____ |
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Definition
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Term
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Definition
| programmed cell death by suicide |
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Term
| ICE-like proteases are _____ . |
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Definition
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Term
| The difference between normal hemoglobin and sickle-cell hemoglobin is in the ___ |
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Definition
| substitution of a specific amino acid for another specific amino acid |
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Term
| The Hardy-Weinberg formula ___ |
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Definition
| is useful in determining the extent to which a sexually reproducing population is evolving |
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