piRNA Notes: Definitions & Explanations PDF | Download eBooks
Study piRNA lecture notes PDF with biology definitions and explanation to study “What is piRNA?”. Study pirna explanation with biology terms to review biology course for online degree programs.
piRNA Definition:
PiRNAs induce formation of heterochromatin, blocking expression of some parasitic DNA elements in the genome known as transposons.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
piRNA Notes:
Piwi-interacting RNA (piRNA) is the largest class of small non-coding RNA molecules that are expressed in animal cells. Just like siRNA and miRNA, piRNAs form RNA-protein complexes, but they form a complex with piwi proteins. These piRNA complexes are mostly involved in the epigenetic and post-transcriptional silencing of transposons however they are also known to be involved in regulating other genetic elements specifically in the germ line cells. They differ from microRNA in size as they comprise about 26-31 not which is larger than the miRNAs. They also lack of sequence conservation.
Keep Learning with Biology Notes
What is Analogous features?
he term analogous structures pertain to the various structures in different species having the same function but have evolved separately, ...
What is Thyroid gland?
The thyroid gland is an endocrine gland located in neck, consists of two lobes. it is situated below the Adam's ...
What is Sexual dimorphism?
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in ...
What is Anaerobic respiration?
Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O2). Although oxygen is not the final electron acceptor, ...
What are Monomers?
The smaller units of a polymer that chain together in large numbers and form a macromolecule that is a polymer ...
What is Hydroponic culture?
Hydroponics is a method of growing plants in a water based, nutrient rich solution. Hydroponics does not use soil, instead ...