List of RNAs

The following are a list of RNAs in nature. Some of these categories are broad, others are single RNA families.

See also

References

External links

RNA

Ribonucleic acid (RNA) is a polymeric molecule implicated in various biological roles in coding, decoding, regulation, and expression of genes. RNA and DNA are nucleic acids, and, along with proteins and carbohydrates, constitute the three major macromolecules essential for all known forms of life. Like DNA, RNA is assembled as a chain of nucleotides, but unlike DNA it is more often found in nature as a single-strand folded onto itself, rather than a paired double-strand. Cellular organisms use messenger RNA (mRNA) to convey genetic information (using the letters G, U, A, and C to denote the nitrogenous bases guanine, uracil, adenine, and cytosine) that directs synthesis of specific proteins. Many viruses encode their genetic information using an RNA genome.

Some RNA molecules play an active role within cells by catalyzing biological reactions, controlling gene expression, or sensing and communicating responses to cellular signals. One of these active processes is protein synthesis, a universal function wherein mRNA molecules direct the assembly of proteins on ribosomes. This process uses transfer RNA (tRNA) molecules to deliver amino acids to the ribosome, where ribosomal RNA (rRNA) then links amino acids together to form proteins.

Royal Naval Air Service

The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps to form a new service, the Royal Air Force, the first of its kind in the world.

During its first year it continued to be the Naval Wing of the joint Royal Flying Corps (which had been set up in 1912), but was administered by the Admiralty's new Air Department, but on 1 August 1915 the RFC became the flying branch of the British Army while the RNAS became "an integral part of the Royal Navy".

Background

In 1908 the British government had recognised that the use of aircraft for military and naval purposes should be investigated. To this end the Prime Minister, H. H. Asquith, approved the formation of an "Advisory Committee for Aeronautics" and an "Aerial Sub-Committee of the Committee of Imperial Defence". Both committees were composed of politicians, army officers and Royal Navy officers. On 21 July 1908 Captain Reginald Bacon, who was a member of the Aerial Navigation sub-committee, submitted to the First Sea Lord Sir John Fisher that a rigid airship based on the German Zeppelin be designed and constructed by the firm of Vickers. After much discussion on the Committee of Imperial Defence the suggestion was approved on 7 May 1909. The airship, named Mayfly, never flew and broke in half on 24 September 1911. The then First Sea Lord, Sir Arthur Wilson, recommended that rigid airship construction be abandoned.

List

A list is any enumeration of a set of items. List or lists may also refer to:

People

Places

Enumerations

Computing

Organizations

Other uses

Homecoming (Heroes)

"Homecoming" is the ninth episode of the first season of the NBC science fiction drama series Heroes.

Plot

The episode begins with Claire and her friend Zach walking into the high school amphitheater with lunch as Claire's former cheerleader friends wait anxiously for the results of the Homecoming Court vote. Claire downplays the entire ritual, but Zach encourages her to check the posting and see if she had won. To Claire's surprise, she has been voted Homecoming Queen, with her main rival, Jackie, merely a member of the court. Astonished, Claire and the rest of the cheerleaders turn around to see much of the student body proclaiming congratulations and support for Claire. She later discovers that Zach had been campaigning for her, working to win the "unpopular vote" by letting everyone know that Claire is not like the popular Jackie. Jackie, however, spoils the moment in an attempt to deflate Claire's victory by poking fun at Zach. Claire, beginning to see the importance of Zach's friendship to her, promptly punches Jackie in the face.

Angle of list

The angle of list is the degree to which a vessel heels (leans, or tilts) to either port or starboard.

A listing vessel is stable and at equilibrium, but the distribution of weight aboard (often caused by uneven loading or flooding) causes it to heel to one side.

By contrast roll is the dynamic movement from side to side caused by waves.

If a listing ship goes beyond the point where a righting moment will keep it afloat, it will capsize and potentially sink.

See also

References