Question

The answer should be more than one.

Select all statements that describe stop codons. 43 10 Check All That Apply points O U Stop codons bind to release factor proteins. eBook 0 U Stop codons are found in exons. Print References 0 Stop codons are also called nonsense codons. 0 Stop codons are 5'UAA, 5' UAG, and 5' UGA. 0 U Stop codons specifically bind uncharged tRNAs. 0 Stop codons are found in introns 0 U Stop codons code for the amino acid methionine. 0 U Stop codons are 5' AAU, 5' GAU, and 5' AGU.

Answer 1

43. Correct options are below

• Stop codons bind to release factor proteins
• Stop codons are found in exons
• Stop codons are also called non sense codons
• Stop codons are 5'UAA, 5'UAG and 5'UGA

UAA, UAG and UGA designate chain termination. These codons are not read by tRNA molecules but rather by specific proteins called release factor. Binding of these release factors to the ribosomes releases the newly synthesized protein.

44. Correct options are below

• messenger RNA
• ribosomal RNA
• transfer RNA

45. Correct options are below

• Amino acids
• Proteins

Protein synthesis is called translation because information present as a nucleic acid is translated into a different language, the sequence of amino acids in a protein. This complex process is mediated by the coordination of more than a thousand macromolecules such as mRNA, rRNA, tRNA, aminoacyl-tRNA synthetase and protein factors.

46. Correct options are below

• Transcription occurs in the nucleus and translation ocurs in the cytoplasm
• Some RNA's are transcribed but do not code for proteins

Different types of RNA like rRNA and tRNA are also trancribed from DNA but do not code for proteins and have different functions. Transcription is done from DNA in the nucleus whereas the process of translation, that is synhesis of potein from RNA takes place in the cytosol. All proteins are synthesized in the cytosol and those needed in the nucleus are then transferred there from the cytosol.