RNA (Ribonucleic Acid) is not an amino acid. Instead, it is a nucleic acid, one of the fundamental macromolecules essential for all known forms of life. Amino acids are the building blocks of proteins and play various roles in metabolism and physiology. In contrast, RNA is made up of a long chain of nucleotide units, each composed of a sugar (ribose), a phosphate group, and a nitrogenous base. RNA is crucial in the coding, decoding, regulation, and expression of genes. It plays a pivotal role in protein synthesis where, through the processes of transcription and translation, the genetic code in the DNA is translated into the amino acid sequence of proteins. RNA and amino acids interact closely in cellular functions, but they are distinct entities with different roles and structures.

Yes, you can paint floorboards with emulsion, but it may not be the ideal choice. Emulsion paint, typically used for walls and ceilings, isn't designed to withstand the heavy foot traffic, abrasion, and cleaning processes floors are subjected to. For a more durable finish, specifically formulated floor paints or varnishes are recommended. These products are made to resist wear and tear, providing a longer-lasting finish. If you decide to use emulsion for aesthetic reasons, applying a clear, durable sealant over the emulsion can help protect the finish. Keep in mind, the longevity and resilience of the painted floorboards using emulsion will likely be less compared to using a product intended for flooring.

Fixing a hole in a polyethylene kayak typically involves plastic welding, a method used to melt and fuse the material around the damage. First, clean the area thoroughly with alcohol to remove any debris or contaminants. Then, using a heat gun and a piece of compatible polyethylene (sometimes a piece from a repair kit or a section from another damaged kayak), carefully heat the edges of the hole and the repair material until they're soft. Press the molten plastic onto the damaged area, ensuring it fully bonds by spreading it evenly over the hole and a bit beyond for reinforcement. Cooling it down slowly will prevent stress formation. Practice on a scrap piece before attempting the repair to get comfortable with the heat gun and melting process. For larger holes, a patch might be necessary, which should be welded around the edges in the same manner.