$t-RNA$ binds to an amino acid at its:

If a certain group of cells utilizes the amino acid glycine exclusively for protein synthesis,and if a growing culture of these cells is fed radioactive glycine,radioactivity will be found first in the

Assertion: Replication and transcription occur in the nucleus,but translation occurs in the cytoplasm.
Reason: $mRNA$ is transferred from the nucleus into the cytoplasm,where ribosomes and amino acids are available for protein synthesis.

In protein synthesis,the polymerization of amino acids involves three steps. Which of the following is not involved in protein synthesis?

Define/Explain the following:
$1.$ Transfer $\text{RNA}$ $(t\text{-RNA})$
$2.$ Ribosomal $\text{RNA}$ $(r\text{-RNA})$

In a polypeptide chain consisting of $125$ amino acids,if the $25^{th}$ amino acid codon mutates to $UAA$,what will happen?