Question

50) During DNA DNA? replication, which of the following enzymes covalently connects segments of A) helicase B) DNA polymerase III C) ligase D) DNA polymerase I E) primase 51) The nitrogenous base adenine is found in all members of which of the following groups of molecules? A) proteins, triglycerides, and testosterone B) proteins, ATP, and DNA C) ATP, RNA, and DNA D) glucose, ATP, and DNA E) proteins, carbohydrates, and ATP 52) A particular triplet of bases in the template strand of DNA is 5'-AGT-3. The corresponding codon for the mRNA transcribed is A) 3-UCA-5'. B) 3-UGA-5' C) 5-TCA-3 D) 3'-ACU-5'. E) either UCA or TCA, depending on wobble in the first base 53) The genetic code is essentially the same for all organisms. Based on this information, one can logically assume which of the following statements to be correct? A) A gene from an organism can theoretically be expressed by any other organism. B) All organisms have experienced convergent evolution. C) DNA was the first genetic material. D) The same codons in different organisms translate into the different amino acids E) Different organisms have different numbers of different types of amino acids 54) The "universal" genetic code is now known to have exceptions. Evidence for this can be found if which of the following is true? A) if UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only) B) if one stop codon, such as UGA, is found to have the same effect on translation as another stop codon, such as UAA C) if prokaryotic organisms are able to translate a eukaryotic mRNA and produce the same polypeptide D) if several codons are found to translate to the same amino acid, such as serine

Answer 1

50. Ligase.
51. ATP, RNA and DNA
52. 3' UCA 5'

A template strand used by DNA polymerase or RNA polymerase to attach complementary bases during DNA replication or RNA transcription. So, complementary to 5’ AGT 3’ in DNA is 3' UCA 5' in RNA.

53. A gene from an organism can theoretically be expressed by any other organism.
54. If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only).

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