Please choose the best answer to the following questions.
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| 1.
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Biological traits are controlled by individual factors, rather than by a single hereditary agent. This idea is referred to as |
| | A) | transcription. |
| | B) | particulate. |
| | C) | blending of traits. |
| | D) | replication. |
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| 2.
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The genetic code is a set of instructions for the production, or synthesis of |
| | A) | proteins. |
| | B) | amino acids. |
| | C) | chromosomes. |
| | D) | deoxyribonucleic acid. |
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| 3.
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What is the job of a protein? |
| | A) | Supporting the cells’ internal structure. |
| | B) | Linking cells together. |
| | C) | Building membranes. |
| | D) | All the above. |
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| 4.
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____________ are responsible for a cells’ chemical reaction. |
| | A) | Enzymes |
| | B) | Nucleotides |
| | C) | Genes |
| | D) | Alleles |
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| 5.
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What are the correct pairings of the four bases found in DNA? |
| | A) | T-C, C-T, A-G, G-A |
| | B) | A-C, C-A, T-G, G-T |
| | C) | A-T, T-A, C-G, G-C |
| | D) | All the above. |
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| 6.
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When mRNA is transcribing an unwound portion of DNA what base takes the place of thymine? |
| | A) | cytosine |
| | B) | guanine |
| | C) | adenine |
| | D) | uracil |
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| 7.
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A sequence of 300 RNA base codes will produce a sequence of _________ amino acids. |
| | A) | 50 |
| | B) | 100 |
| | C) | 300 |
| | D) | 600 |
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| 8.
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Most traits of complex organisms are |
| | A) | polygenic. |
| | B) | homozygous. |
| | C) | monogenic. |
| | D) | heterozygous. |
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| 9.
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The AB blood type is an example of |
| | A) | homozygous alleles. |
| | B) | a polygenic trait. |
| | C) | codominant alleles. |
| | D) | All the above. |
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| 10.
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The definition of mitosis is |
| | A) | the process of cell division that results in two copies of the original cell. |
| | B) | the process of cell division in which gametes are produced. |
| | C) | the breaking up of allele pairs in the production of gametes. |
| | D) | the genetic change that results from crossing over. |
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| 11.
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Which of the following can account for variation within a species? |
| | A) | recombination |
| | B) | mutations |
| | C) | crossing over |
| | D) | All the above. |
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| 12.
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The definition of a genome is |
| | A) | the chemical or physical results of the genetic code. |
| | B) | the total genetic endowment of an organism. |
| | C) | all the alleles possessed by an organism. |
| | D) | any mistake in an organism’s genetic code. |
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