Question

O) The role of the 23S TRNA of the large ribosomal subunit of E. coli during protein synthesis is: a. aid in initiation of protein synthesis b. contributes to the process of translocation during the elongation stage of protein synthesis c. helps to form the A site within the ribosome d. actively forms a peptide bond e. none of the above P) Spontaneous mutations can be caused by: a. incorrect translation b. telomerase c. chemical mutagens d. tautomeric shifts e. incorrect charging of a tRNA Q) Two formal terms used to describe categories of mutational nucleotide substitutions (point mutations) in DNA are called: a. base analogues and frameshift b. error prone and spontaneous c. transversions and transitions d. euchromatic and heterochromatic e. sense and antisense R) RNA polymerase: a. can bind at any location on DNA to start RNA synthesis b. incorporates nucleotides into growing RNA from the 5 to the 3' end c. uses a template strand of RNA to specify the sequence of bases in DNA d. has 3'-» exonuclease activity e is found in 3 different forms in E coli S) Flower color in the garden pea is due to two interacting genes, A and B. If either gene is recessive (aaB_A_bb, or aabb) then the phenotype is white. A dominant allele must be present at both genes for flower color to be purple. Among the selfed progeny from the genotype AaBb, what ratio will have purple flowers? a. none b. 1/4 c. 9/16 d. 3/4 e. all

Answer 1

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