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Download Name: DNA and Protein Synthesis Worksheet /14 Goal: The identity
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Name: DNA and Protein Synthesis Worksheet /14 Goal: The identity and function of each cell is determined by the genetic code which is within the DNA molecule. When cells divide DNA needs to be replicated. When important proteins need to be made the cell’s DNA provides the blueprint. 1. Name X in the diagram (1 mark) 2. How many guanines are in a DNA molecule 1000 base pairs long if 20% of the molecule consists of thymine?(1 mark) 3. Why is DNA replication considered semi conservative? ( 1 mark) 4. Referring to the mRNA strand below list the anticodons and identify the amino acids sequence. (2 marks) mRNA – GGU GUA AUU tRNA – Amino acids – 5. Which of the following is not true of a codon? a. it consists of three nucleotides b. it may code for the same amino acid as another codon c. it extends from one end of a tRNA molecule d. it is the basic unit of the genetic code 6. The anticodon of a particular tRNA molecule is a. complementary to the corresponding mRNA codon b. complementary to the corresponding triplet in rRNA c. the part of tRNA that bonds to a specific amino acid d. changeable, depending on the amino acid that attaches to the tRNA 7. How is the structure of tRNA important to its function? (2 marks) 8. What are the three causes of gene mutations? (3 marks) 9. What is the basis for DNA fingerprinting? (2 marks)
