Can RNA be found in chloroplast?
Chloroplasts are thus analogous to mitochondria in that they contain ribosomal and transfer RNA species that can be clearly differentiated from the corresponding cytoplasmic RNA species.
Do chloroplast have mRNA?
Altogether, the available data demonstrate that chloroplast mRNAs are stable in the absence of translation and do not require physical protection by ribosomes.
Is chloroplast dna polycistronic?
Chloroplasts contain their own genome, organized as operons, which are generally transcribed as polycistronic transcriptional units.
Is RNA processing rare?
RNA editing is relatively rare, with common forms of RNA processing (e.g. splicing, 5′-capping, and 3′-polyadenylation) not usually considered as editing. In other organisms, such as squids, extensive editing (pan-editing) can occur; in some cases the majority of nucleotides in an mRNA sequence may result from editing.
What is chloroplast in RNA?
The chloroplast genome encodes proteins required for photosynthesis, gene expression, and other essential organellar functions. Derived from a cyanobacterial ancestor, the chloroplast combines prokaryotic and eukaryotic features of gene expression and is regulated by many nucleus-encoded proteins.
Does chloroplast contain DNA and RNA?
C. Chloroplast DNA. Each chloroplast contains from about 22 to 900 cpDNA copies and each encodes 123 genes. These include four genes for rRNA, 20 genes for ribosomal proteins, 30 genes for tRNAs, many of the photosynthetic proteins, six of the nine genes for ATPase, and chloroplast RNA polymerase.
Do chloroplasts have own DNA?
Chloroplasts and mitochondria are subcellular bioenergetic organelles with their own genomes and genetic systems. DNA replication and transmission to daughter organelles produces cytoplasmic inheritance of characters associated with primary events in photosynthesis and respiration.
Which RNA HELS are in the process of photosynthesis?
RNA-P is often the major non-storage form of P in photosynthetic organisms, and any attempts to increase the P-use efficiency of growth of algae and plants must include a consideration of economizing on the use of RNA.
How does chloroplast DNA replicate?
Chloroplasts contain multiple copies of a DNA molecule (the plastome) that encodes many of the gene products required to perform photosynthesis. The plastome is replicated by nuclear-encoded proteins and its copy number seems to be highly regulated by the cell in a tissue-specific and developmental manner.
Why is chloroplast DNA important?
Creation of disease-resistant plants by gene engineering The chloroplast genome is a circular DNA containing some number of genes necessary for functioning of the chloroplasts and maintaining their structure. These DNA also contain the genes of ribosomal and transport RNA.
How are exon different from introns?
The parts of the gene sequence that are expressed in the protein are called exons, because they are expressed, while the parts of the gene sequence that are not expressed in the protein are called introns, because they come in between the exons.