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1 | |
The Fraenkel Conrat experiment showed |
| | A) | viruses are made up of RNA |
| | B) | viruses are made up of DNA |
| | C) | the virulent part of the tobacco mosaic virus is the protein coat |
| | D) | the virulent part of the tobacco mosaic virus is RNA |
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2 | |
DNA is made up of a phosphate group, an organic base, and |
| | A) | a protein. |
| | B) | a sugar. |
| | C) | a molecule of ATP. |
| | D) | a fat. |
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3 | |
In the DNA molecule |
| | A) | adenine pairs with thymine. |
| | B) | guanine pairs with thymine. |
| | C) | cytosine pairs with thymine. |
| | D) | guanine pairs with cytosine. |
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4 | |
If one side of a DNA molecule contains the following sequence of nucleotide, AGTCCG, the complementary sequence on the other side would be |
| | A) | GCCTGA. |
| | B) | AGTCCG. |
| | C) | TCAGGC. |
| | D) | CTGAAT. |
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5 | |
Which one of the following is not a kind of RNA? |
| | A) | tRNA (transfer RNA) |
| | B) | mRNA (messenger RNA) |
| | C) | rRNA (ribosomal RNA) |
| | D) | nRNA (nuclear RNA) |
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6 | |
The direct result of transcription is |
| | A) | a duplicate DNA molecule. |
| | B) | nRNA. |
| | C) | a protein. |
| | D) | mRNA. |
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7 | |
The direct result of translation is |
| | A) | a duplicate DNA molecule. |
| | B) | nRNA. |
| | C) | a protein. |
| | D) | mRNA. |
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8 | |
Which one of the following is not associated with transcription? |
| | A) | rRNA |
| | B) | mRNA |
| | C) | RNA polymerase |
| | D) | DNA |
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9 | |
Which one of the following is not associated with translation? |
| | A) | rRNA |
| | B) | mRNA |
| | C) | tRNA |
| | D) | DNA |
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10 | |
In the process of translation, the amino acids are arranged to form specific proteins because they are attached to |
| | A) | rRNA |
| | B) | tRNA |
| | C) | mRNA |
| | D) | promoter |
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11 | |
Proteins that block the passage of RNA polymerase are called |
| | A) | operons. |
| | B) | activators. |
| | C) | repressors. |
| | D) | enhancers. |
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12 | |
Which of the following is part of an operon? |
| | A) | protein-encoding genes |
| | B) | an operator |
| | C) | a promoter |
| | D) | a, b, and c |
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13 | |
Changes that alter the sequence of DNA nucleotides are called point mutations. |
| | A) | true |
| | B) | false |
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14 | |
Genes that can move about from one location on a chromosome to another are called transposons. |
| | A) | true |
| | B) | false |
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15 | |
A single gene may use a regulatory site to control the expression of that gene, but is unable to turn a gene off and on. |
| | A) | true |
| | B) | false |
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16 | |
The process of acquiring a gene from another organism is called transformation. |
| | A) | true |
| | B) | false |
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17 | |
The Hershey-Chase experiment showed that the virus protein is responsible for directing the production of new viruses. |
| | A) | true |
| | B) | false |
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18 | |
Chargaff's rule suggests that the purines and pyrimidines in the DNA molecule combine in a nonrandom pattern. |
| | A) | true |
| | B) | false |
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19 | |
The two sides of the double helix structure of DNA are held together with hydrogen bonds. |
| | A) | true |
| | B) | false |
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20 | |
In DNA replication, DNA polymerase assembles a complementary new strand on each old one. |
| | A) | true |
| | B) | false |
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21 | |
Transcription takes place in the nucleus using the DNA in the nucleus as a template for the formation of proteins. |
| | A) | true |
| | B) | false |
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22 | |
Each three-nucleotide block in a gene corresponds to a particular amino acid. |
| | A) | true |
| | B) | false |
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23 | |
The vast variety of characteristics results from the fact that an almost unlimited number of codons can be formed. |
| | A) | true |
| | B) | false |
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24 | |
Most genes in your cells exist in clusters of almost identical sequences. |
| | A) | true |
| | B) | false |
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25 | |
Genes are composed of segments of "extra," nonessential materials called exons. |
| | A) | true |
| | B) | false |
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