Answer:
a. MicroRNAs (miRNAs) bind to complementary sequences in mRNA and block its translation.
b. Piwi-associated RNAs (piRNAs) reestablish appropriate methylation patterns in the genome during gamete formation.
Explanation:
MicroRNAs
These are the small non-coding RNA molecule. These RNA consist of about 22 nucleotides. MicroRNAs are found in animals, plants and some viruses,
MiRNAs function
MicroRNAs also represented as miRNA function through base-pairing with complementary sequences of mRNA molecules. Due to this base pairing it functions as RNA silencing and regulation of gene expression.
Piwi-interacting RNA
piRNA expressed in animal cell. piRNA are the small non-coding RNA molecules which form RNA-protein complexes.
Piwi-interacting RNA Function:
Function of these complexes are epigenetic and post-transcriptional silencing of transposons.
Small interfering RNA :
siRNA molecules are the small pieces of double-stranded (ds) RNA. There length is about 21 nucleotides long. siRNA have 3' (3 prime) overhangs
Small interfering RNA Function:
siRNA overhangs are used to "interfere" protein translation. They perform this function by binding and degradation of mRNA at specific sequences
Coronaviruses are viruses that affect animals and humans in the respiratory tract. they can be in common colds, phneumonia and can also effect the gut. Coronaviruses were first identified in the 1960's. In the case of humans this is commonly caught in the winter months or early spring. So far there is currently no cure for this illness.
Answer:
definitely D because a rainforest is extremely vast when it comes to different species
Explanation:
brainliest plz?
Users commonly expressed unpleasant sentiments on social media platforms and shared those emotions.
<h3>What are social networking sites used for?</h3>
The term "social media" refers to online platforms that enable people to share, create, and/or exchange knowledge and ideas with one another. In charge of managing is the Office of Communications und Marketing.
<h3>What is the function of social media?</h3>
Social media is used by billions of people to communicate and exchange information on a global scale. Social media allows you to connect with loved ones, learn new things, pursue your interests, and find enjoyment for yourself.
To know more about social media visit:
brainly.com/question/24687421
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