2B. TRANSLATION 1. Choose the true statement about the genetic code. a. The genetic code is redundant, with multiple cod

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2b Translation 1 Choose The True Statement About The Genetic Code A The Genetic Code Is Redundant With Multiple Cod 1 (163.77 KiB) Viewed 14 times

2B. TRANSLATION 1. Choose the true statement about the genetic code. a. The genetic code is redundant, with multiple codons specifying a single amino acid. b. The genetic code encodes 64 amino acids, one for each of the 64 corresponding codons. c. The genetic code varies widely among organisms, with each having a different set of codons for a corresponding amino acid. d. mRNA codon is made of four nucleotides to specify a single amino acid. 2. Which of the following does NOT have direct role in translation? a. tRNA b. DNA c. Ribosomes d. Amino acids 3. Choose the true statement about protein synthesis. a. In eukaryotes, translation occurs in the nucleus; in prokaryotes, translation occurs in the cytoplasm. b. Prokaryotic cells produce polycistronic mRNA as a product of transcription, which must then be spliced to remove introns prior to translation. c. The first amino acid in a eukaryotic protein sequence is methionine, whereas the first amino acid in a prokaryotic protein sequence is formyl methionine. d. In eukaryotes, translation can start before transcription finishes, whereas prokaryotic mRNA must first undergo processing. 4. How is translation terminated? a. When the ribosome runs out of the mRNA b. When there are no more charged tRNA molecules c. When the A, P, and E sites are all filled d. When ribosome reaches the stop codon, a protein called a release factor enters and binds to the A site 5. How does the ribosome know if the entering charged tRNA is correct? a. The anticodon on the tRNA base pairs to the codon on the mRNA. b. The incorrect tRNA does not fit into the A site. c. The preceding amino acid will not permit it to enter the A site. 6. Choose the true statement(s) about stop codons [mark all correct answers] a. Stop codons are needed to terminate transcription. b. All organisms use the stop codon AUG to terminate protein synthesis. c. There are more than one stop codons in the genetic code. d. Under specific circumstances, stop codons may encode non-standard amino acids seen in Archaea and Bacteria. 7. The site of translation is a. ribosomes b. plasma membrane c. nucleus d. Golgi apparatus