**Question:** True about genetic code:

A. The genetic code is universal and the same for all organisms.
B. The genetic code is specific to bacteria and viruses.
C. The genetic code includes stop codons for termination of protein synthesis.
D. The genetic code is specific to plants and animals.

**Correct Answer:**

**Core Concept:** The genetic code refers to the set of instructions used by cells to translate genetic information into functional proteins. It consists of a set of triplets of nucleotides (codons) that correspond to specific amino acids or signal the termination of protein synthesis.

**Why the Correct Answer is Right:**

The correct answer is **A** because the genetic code is indeed universal and the same for all organisms, including bacteria, archaea, and eukaryotes. The code has been conserved throughout evolution, ensuring that proteins can be synthesized accurately across different kingdoms.

**Why Each Wrong Option is Incorrect:**

**B** is incorrect because the genetic code is not specific to bacteria and viruses, as it applies to all living organisms. Bacteria and viruses use the same genetic code as eukaryotes, although with some variations in their tRNA molecules.

**C** is incorrect because the genetic code includes start and stop codons, which indicate the beginning and end of a protein-coding segment, respectively. These are not specific to a particular group of organisms.

**D** is incorrect because the genetic code is not specific to plants and animals. It is the same for all organisms, including bacteria, archaea, and eukaryotes.

**Clinical Pearl:** The universality of the genetic code ensures consistent translation of genetic information into functional proteins across different organisms, enabling interchangeability of genetic information among species. This concept is essential for understanding molecular biology and the translation process in cells.