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1 . |
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Who of the following formulated the one gene–one enzyme hypothesis? (Concept 17.1 ) [Hint]
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2 . |
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Genetic information of eukaryotic cells is transferred from the nucleus to the cytoplasm in the form of _____. (Concept 17.1 ) [Hint]
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3 . |
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Which one of the following statements is true? (Concept 17.1 ) [Hint]
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4 . |
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When RNA is being made, the RNA base _____ always pairs with the base _____ in DNA. (Concept 17.1 ) [Hint]
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5 . |
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Which one of the following is not associated with RNA? (Concept 17.1 ) [Hint]
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6 . |
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What mRNA codon would be made from the DNA triplet CGT? (Concept 17.1 ) [Hint]
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7 . |
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The number of nucleotide bases "read" together on the mRNA to designate each amino acid is _____; this unit is called a(n) _____. (Concept 17.1 ) [Hint]
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8 . |
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The codons AAA, CCC, GGG, and UUU specify the amino acids lysine, proline, glycine, and phenylalanine, respectively. Which of the following DNA sequences would specify the peptide pro-gly-lys-phe if present in the template strand? (Concept 17.1 ) [Hint]
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9 . |
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The codons AAA, CCC, GGG, and UUU specify the amino acids lysine, proline, glycine, and phenylalanine, respectively. What peptide sequence would be encoded by the sequence 5'-CCCAAATTTGGG-3', if present in the coding strand of the DNA? (Concept 17.1 ) [Hint]
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10 . |
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How many nucleotides are needed to code for a protein with 450 amino acids? (Concept 17.1 ) [Hint]
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11 . |
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In many cases, more than one codon codes for the same amino acid. Because of this, we say that the code is _____. (Concept 17.1 ) [Hint]
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12 . |
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At one point as a cell carried out its day-to-day activities, the nucleotides GAT were paired with the nucleotides CUA. This pairing occurred _____. (Concept 17.2 ) [Hint]
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13 . |
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Which one of the following catalyzes the linkage between ribonucleotides to form RNA during gene expression? (Concept 17.2 ) [Hint]
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14 . |
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In eukaryotic cells, a terminator in mRNA synthesis is _____. (Concept 17.2 ) [Hint]
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15 . |
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In a eukaryotic cell, transcription takes place _____. (Concept 17.2 ) [Hint]
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16 . |
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One strand of a DNA molecule has the following sequence: 3'-AGTACAAACTATCCACCGTC-5'. In order for transcription to occur in that strand, there would have to be a specific recognition sequence, called a(n) _____, to the left of the DNA sequence indicated. (Concept 17.2 ) [Hint]
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17 . |
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During the transcription of a given portion of a DNA molecule _____. (Concept 17.2 ) [Hint]
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18 . |
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In transcription, _____. (Concept 17.2 ) [Hint]
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19 . |
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In eukaryotes, which of the following mechanisms of gene regulation operates after transcription, but before translation of mRNA into protein? (Concept 17.3 ) [Hint]
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20 . |
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Usually, in eukaryotic genes _____. (Concept 17.3 ) [Hint]
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21 . |
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Which one of the following statements correctly describes mRNA processing? (Concept 17.3 ) [Hint]
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22 . |
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The structures called snRNPs are _____. (Concept 17.3 ) [Hint]
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23 . |
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Nuclei of eukaryotic cells contain spliceosomes that are made up of _____. (Concept 17.3 ) [Hint]
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24 . |
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A cell biologist found that two different proteins with largely different structures were translated from two different mRNAs. These mRNAs, however, were transcribed from the same template within the cell nucleus. Which mechanism below could best account for this? (Concept 17.3 ) [Hint]
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25 . |
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The function of tRNA during protein synthesis is to _____. (Concept 17.4 ) [Hint]
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26 . |
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Which of the following summaries of protein synthesis is correct? (Concept 17.4 ) [Hint]
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27 . |
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The bonds that hold tRNA molecules in the correct three-dimensional shape are _____. (Concept 17.4 ) [Hint]
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28 . |
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The translation process in eukaryotes requires all of the following, except _____. (Concept 17.4 ) [Hint]
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29 . |
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During translation in a eukaryotic cell _____. (Concept 17.4 ) [Hint]
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30 . |
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The P site of a ribosome does which one of the following? (Concept 17.4 .) [Hint]
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31 . |
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The first amino acid inserted into a new polypeptide chain in eukaryotic cells is always _____. (Concept 17.4 ) [Hint]
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32 . |
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A 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? (Concept 17.4 ) [Hint]
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33 . |
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During translation, amino acid chain elongation occurs until _____. (Concept 17.4 ) [Hint]
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34 . |
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Polysomes may be defined as _____. (Concept 17.4 ) [Hint]
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35 . |
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Cells are able to distinguish proteins destined for secretion or for segregation to specific intracellular compartments from those that will remain in the cytoplasm because _____. (Concept 17.4 ) [Hint]
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36 . |
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What is the proper order of the following events in the expression of a eukaryotic gene?
1. translation
2. RNA processing
3. transcription
4. modification of protein
(Concept 17.4 ) [Hint]
| 1, 2, 3, 4 |
| 3, 2, 1, 4 |
| 4, 2, 3,1 |
| 2 ,3, 4, 1 |
| 1, 2, 4, 3 |
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37 . |
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Which is a key difference between gene expression in eukaryotic and prokaryotic cells? (Concept 17.6 ) [Hint]
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38 . |
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A geneticist found that a particular mutation had no effect on the polypeptide encoded by the gene. This mutation probably involved _____. (Concept 17.7 ) [Hint]
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39 . |
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Which one of the following types of mutation is least likely to affect the function of the protein corresponding to the gene in which the mutation occurs? (Concept 17.7 ) [Hint]
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40 . |
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A base-substitution mutation in a germ cell line is likely to have no effect on phenotype if the substitution _____. (Concept 17.7 ) [Hint]
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41 . |
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A virus infects a cell and randomly inserts many short segments of DNA containing a stop codon throughout the organism's chromosomes. This will probably cause _____. (Concept 17.7 ) [Hint]
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42 . |
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A point mutation in which a single base pair is inserted or deleted from DNA is called a(n) _____. (Concept 17.7 ) [Hint]
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43 . |
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Ultraviolet (UV) radiation is damaging to cells because it _____. (Concept 17.7 ) [Hint]
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