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1 | |
The chemical actions of __ are responsible for all the living things in the world. |
| | A) | DNA |
| | B) | genes |
| | C) | RNA |
| | D) | proteins |
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2 | |
Proteins are also known as __. |
| | A) | codons |
| | B) | nucleotides |
| | C) | polypeptides |
| | D) | chromatin |
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3 | |
The folding of a protein into a general pattern is a characteristic of its __ structure. |
| | A) | primary |
| | B) | secondary |
| | C) | tertiary |
| | D) | quaternary |
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4 | |
It is possible for the __ residue in proteins to form disulfide bridges. |
| | A) | glycine |
| | B) | tyrosine |
| | C) | lysine |
| | D) | cysteine |
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5 | |
The G-C base pair is somewhat stronger than the __ pair because it is held together by three hydrogen bonds. |
| | A) | C-A |
| | B) | G-T |
| | C) | G-A |
| | D) | A-T |
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6 | |
The many __ make the double-helix of DNA a relatively stable structure. |
| | A) | hydrogen bonds |
| | B) | disulfide bridges |
| | C) | ionic bonds |
| | D) | peptide bonds |
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7 | |
Given the base sequence, T A G C A A T G, identify the complementary strand. |
| | A) | G C T A C C G T |
| | B) | C G A T G G C A |
| | C) | T A G C A A T G |
| | D) | A T C G T T A C |
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8 | |
The A-T base pair in DNA is replaced by an __ base pair in RNA. |
| | A) | A-U |
| | B) | A-C |
| | C) | A-G |
| | D) | A-R |
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9 | |
The production of an RNA copy of a gene is called __. |
| | A) | coding |
| | B) | transcription |
| | C) | translation |
| | D) | transfer |
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10 | |
The base sequences on __ determine the order in which amino acids become linked together in a protein. |
| | A) | the codons |
| | B) | the anticodons |
| | C) | mRNA |
| | D) | rRNA |
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11 | |
The important chemical process of copying DNA is known as DNA __. |
| | A) | copying |
| | B) | replication |
| | C) | translation |
| | D) | coding |
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12 | |
Amino acids all have a(n) __ group and a(n) __ group. |
| | A) | keto, aldehyde |
| | B) | peptide, glycogen |
| | C) | amine, carboxylic acid |
| | D) | amide, carboxyl |
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13 | |
DNA consists of alternating __ and __ groups. |
| | A) | amine, carboxylic acid |
| | B) | amino acid, sugar |
| | C) | monosaccharide, polypeptide |
| | D) | sugar, phosphate |
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14 | |
The complementary RNA code for TGA is |
| | A) | GAC. |
| | B) | UCA. |
| | C) | ACU. |
| | D) | TGA. |
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15 | |
Chromosomes contain DNA molecules coiled around __ molecules. |
| | A) | sugar |
| | B) | protein |
| | C) | carbohydrate |
| | D) | lipid |
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16 | |
__ are proteins that help us fight off diseases. |
| | A) | Activators |
| | B) | Messenger molecules |
| | C) | Antibodies |
| | D) | Inhibitors |
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17 | |
The amino acid __ determine(s) what the protein can do. |
| | A) | hydrogen bonds |
| | B) | disulfide bridges |
| | C) | sequence |
| | D) | side chains |
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18 | |
Enzymes __ particular reactions in our bodies. |
| | A) | coordinate |
| | B) | mediate |
| | C) | catalyze |
| | D) | inhibit |
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19 | |
The information stored in DNA takes the form of variable patterns of __ chemical groups called the "bases of DNA". |
| | A) | 4 |
| | B) | 8 |
| | C) | 12 |
| | D) | 20 |
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20 | |
Genetic engineering has been useful for producing __. |
| | A) | keratin |
| | B) | hemoglobin |
| | C) | antibodies |
| | D) | insulin |
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