A endow is present time the following type of RNA: A) rRNA B) tRNA C) mRNA D) mi

Question

A endow is present time the following type of RNA: A) rRNA B) tRNA C) mRNA D) microRNA If the sire of an mRNA is 612 bases long. Assuming that all bases are used as codon, the size of the translation product would be: A) 204 amino acids B) 1512 amino acids C) 1200 amino acids D) 1200 amino acids E) 504 amino acids A codon, GGG codes for glycine in E. col. In human, glycine will be coded by: A) AAA B) GGG D) ULTU E) TT During translation, chain elongation continues until what happens? A) No further amino acids are needed by the cell. B) All tRNAs are empty. C) The polypeptide is long enough. D) A stop codon is encountered. E)The ribosome's run of the end of mRNA. "Primer" molecule required for initiation of replication is a piece of: A) RNA B) DNA C) Protein D) Lipid E) Carbohydrate Chloramphenicol inhibits protein synthesis by A) blocks binding of aminoacyl-tRNA to A-site of nib some. B) blocks initiation of RNA chains. C) blocks translocation. D) prevents peptide transferees reaction on ribosome.

Explanation / Answer

22. C) mRNA (A codon is a triplet of nucleotide bases prsent on the mRNA strand that codes for one amino acid.)

23. A) 204 amino acids ( all 612 bases are used as codon and since an amino acid is formed from 3 codons, thus by dividing 612 by 3, we get 204 amino acids)

25. D) A stop codon is encountered. (Chain elongation in translation is terminated when the ribosome encounters a stop codon i.e. UAA, UAG, UGA)

26. A) RNA (In DNA replication, short strands of RNA are used as primer to initiate the replication process.)

27. D) prevents peptidyl transferase reaction on ribosome.

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