Put these steps of translation in the right order. The tRNA that has lost its am

Question

Put these steps of translation in the right order. The tRNA that has lost its amino acid is ejected from the ribosome. The ribosome moves the distance of one codon A tRNA holding an amino acid enters the ribosome, and binds next to met-tRNA. A ribosome with a methioninc-tRNA assembles at the start codon on mRNA. A peptide bond is formed between the amino acids. 4, 2, 3, 1, 5 4, 3, 5, 2, 1 3, 4, 2, 5, 1 4, 5, 2, 1, 3 "Wobble" during protein synthesis refers to the use of one of THREE possible stop signals during protein synthesis the movement of a ribosome by a measured distance of 3 bases the point third base pair between a codon and anticodon is not specific the fact that the genetic code is essentially universal between species The enzyme peptidyl transferasre is one of the proteins found in ribosomes is one of the rRNA's in the ribosome catalyzes formation of peptide bonds between amino acids A and C B and C Which of these cause induced mutations? radiation A, B, and C errors in DNA replication B and C only jumping genes If a normal amino acid sequence is -ala-trp -leu-ser-arg--.and a mutation produces the amino acid sequence: -ala- trp-phc-val- asn- pro-.... then this is an example of a(n) nonsense mutation missense mutation silent mutation frameshift mutation Which of these bacteria cells are transformed? A bacteria cell receives F plasmid DNA from another bacteria cell, so this bacteria also develops 'sex pili' A bacteria cell picks up DNA from its environment, and develops new traits because of the genes it has acquired A bacteria cell is infected by a virus, only this virus contains bacteria DNA (!) ALL of the above are examples of transformation In E. coil and other bacteria many genes are grouped into operons. Which of these is the BEST description of an operon? A group of genes that operate together in a biochemical pathway The genes found together on a plasmid A cluster of similar genes, descended from an ancestor by gene duplication A group of genes, clustered together, and arc controlled by a single promoter and an 'operator'

Explanation / Answer

Answer :

Question number 19 : The correct option is C. These steps explains the events that occurs during the initiation and elongation of protein synthesis.

Question number 20 : The correct answer is C

Explanation :

Wobble hypothesis was proposed by crick to explain the possible cause of degeneracy of genetic codons in which a single tRNA can recognise more than one codon and it states that strict Watson and crick base pairing applies only to the first two bases of a codon and the third base has relaxed base pairing. This means that the first two letters of each codon are the primary determinants of specificity and the third base in the codon often fails to recognise the specific complementary base in the anticodon which allows the tRNA to recognise more than one codon. For example, Inosinate in the tRNA can form hydrogen bonds with three different nucleotides (U, C, and A) of mRNA.

3   2   1            3   2   1           3   2   1

Anticodon (3’)       G- C- I            G- C- I           G- C- I

Codon        (5’)       C-G - A           C-G – U          C-G - U

1   2   3            1   2    3           1   2   3

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