Definition of gene?

1. What is a gene?

2. Central Dogma of
Biology - By Crick
The flow of information is
from DNA->RNA->
Protein
The formation of mRNA
from a DNA template is
called transcription
The formation of protein
using information on
mRNA on ribosome is
called translation.
There fore Gene is a
segment of DNA coding
for a functional protein or
polypeptide.
Is it enough?
http://www.biologyexams4u.com/2013/03/what-is-gene.html

3. tRNA rRNA
Genes codes for
transfer RNA and
ribosomal RNA
Genes coding for rRNA
are called rDNA genes
There fore Gene is a
segment of DNA coding
for a functional protein or
polypeptide, tRNAs and
rRNAs.
Is it enough?
http://www.biologyexams4u.com/2013/03/what-is-gene.html

4. ribozymes
Ribozymes are RNAs
with catalytic activity
1983-Thomas Cech
discovered ribozymes
Major ribozymes include
Spliceosome in hnRNA
processing
Peptidyl transfersase in
translation
Telomerase involved in
telomere replication
Now the definition of gene
is ?
http://www.biologyexams4u.com/

5. ‘Gene is a segment of DNA
that codes for a functional
protein, tRNA, rRNA or
ribozymes’.
Definition of gene at
present?
http://www.biologyexams4u.com/