Which of the following is the correct order of steps in translation?

1. the ribosome translocates the trna in the a site to the p site and the empty trna in the p site is moved to the e site where it is released
2. the large ribosomal subunit attaches with the initiator trna with the amino acid methionine (met) located in the p site
3. a release factor, a protein shaped like an aminoacyl trna, promotes hydrolysis and releases the polypeptide
4. a small ribosomal subunit binds to a molecule of mrna5. the anticodon of an incoming aminoacyl trna base-pairs with the complementary mrna codon in the a site

4,2,1,3

Explanation:

4. A small ribosomal subunit binds to a molecule of mRNA5. the anticodon of an incoming aminoacyl tRNA base-pairs with the complementary mRNA codon in the A site.

2. The large ribosomal subunit attaches with the initiator tRNA with the amino acid methionine (Met) located in the P site.

1. The ribosome translocates the tRNA in the A site to the P site and the empty tRNA in the P site is moved to the E site where it is released.

3. A release factor, a protein shaped like an aminoacyl tRNA, promotes hydrolysis and releases the polypeptide.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).