Ch. 1 HW ans key - Problems 1 A T G C=100 if T=15 then A=15...

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Ch. 1 HW answer key: MCQ: 1. E 2. D 3. E 4. C 5. C 6. E 7. C Fill in the blanks: 1. Complementarity 2. Restriction enzymes 3. Alleles 4. Phenotype 5. Model organisms Short questions: 1. The features of DNA that are vital to its being the hereditary molecule are: a) ability to replicate b) its informational content c) relative stability while still retaining the ability to mutate or change 2. Adenine: thymine, guanine: cytosine 3. The genetic code consists of a linear series of three adjacent nucleotides present in mRNA molecules. 4. Functional and structural relationships among DNA, RNA and protein. 5. Both are gene products and composed of a string of amino acids. Enzymes are catalysts for most biochemical reactions. Non-enzymatic proteins include structural (collagen), protective (immunoglobulin) and transport (hemoglobin) proteins.
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Unformatted text preview: Problems: 1. A+T+G+C=100%, if T=15%, then A=15%. C= 100-15(2)/2= 35% 2. a) TAA CCA CGT AAT GAA GTC CGA GAT b) 3’- UAA CCA CGU AAU GAA GUC CGA GAU- 5’ 3. Anticodon in the tRNA: AAU 4. a) For the fungus to be orange, as in mutant 1, orange pigment would have to accumulate without changing to red. This would occur if Enzyme C was defective. b) Enzyme B must be defective c) Yellow due to lack of enzyme B 5. Protein function can be destroyed by a mutation that causes the substitution of a single amino acid, even though the protein has the same immunological properties. A substitution of one of the key amino acids may make the enzyme totally non-functional, though there might be no effect on overall size and shape of the protein....
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