In all cells it is DNA, in viruses it is sometimes DNA and sometimes RNA.
DNA does. RNA just sends out messages from DNA to the rest of the cell.
DNA is the genetic code
Yes. With the exception of some viruses which use RNA, all organisms on Earth code their genetic information on DNA. In some cases prokaryotes use a modified genetic code where a few codons will have different meanings than they do in eukaryotes, but broadly speaking, the DNA genetic code is a universal feature of all known organisms.
The genetic material that viruses have is RNA. Viruses are unable to truly carry out the processes associated with holding their own DNA.
Viruses contain either DNA or RNA.
Because bacteria have only DNA as genetic material but viruses have RNA or DNA as genetic material. viruses are harmful but most of the bacteria are useful.
Copying the genetic code is called DNA replication. It relates to DNA in that DNA carries the genetic code.
Yes, eukaryotic plant cells have DNA. Everything that is considered 'alive' (animals, plants, fungus, bacteria, viruses etc) has some form of nucleic acid encoding their features. Most have double stranded DNA as their genetic code, but a few species (such as some types of viruses) have single-stranded DNA or RNA as their genetic code. Remember; if it has proteins, it MUST have DNA/RNA.
The genetic code is carried by the macromolecule DNA. In particular, the sequence of nitrogen bases on the DNA determines the genetic code.
DNA carries the genetic code.
The master copy of an organism's genetic code is the DNA.