Small nuclear RNA (snRNA) is not a type of RNA molecule, but rather a type of non-coding RNA that is involved in the processing of pre-messenger RNA (pre-mRNA) in the nucleus.

Transcription is the process by which DNA is copied into RNA. It is carried out by an enzyme called RNA polymerase, which synthesizes a complementary RNA strand using one of the DNA strands as a template.

A deoxyribose sugar is not a component of a nucleotide, but rather a component of DNA. Nucleotides are composed of a nitrogenous base, a phosphate group, and a ribose sugar.

Translation is the process by which RNA is translated into a protein. It is carried out by ribosomes, which are large protein complexes that read the sequence of codons in mRNA and assemble the corresponding amino acids into a polypeptide chain.

Transversion is not a type of mutation, but rather a type of substitution mutation in which a purine base is replaced by a pyrimidine base, or vice versa.

The genetic code is also known as the codon table. It is a set of rules that specifies the relationship between the sequence of codons in mRNA and the sequence of amino acids in a protein.

Quaternary structure is not a type of protein structure, but rather a type of protein assembly in which multiple polypeptide chains come together to form a functional protein complex.

Protein folding is the process by which proteins are folded into their functional conformations. It is a complex process that is driven by a variety of forces, including hydrophobic interactions, hydrogen bonding, and disulfide bond formation.

Ligases are not a type of enzyme, but rather a type of enzyme that catalyzes the formation of new covalent bonds between two molecules.

Mitosis is the process by which cells divide. It is a continuous process that consists of four distinct stages: prophase, metaphase, anaphase, and telophase.

Sporulation is not a type of cell division, but rather a process by which some microorganisms produce spores.

Endocytosis is the process by which cells take in nutrients from their surroundings. It is a complex process that involves the formation of vesicles that engulf the nutrients and transport them into the cell.

Receptors are not a type of transport protein, but rather a type of protein that binds to specific molecules and triggers a cellular response.

Signaling is the process by which cells communicate with each other. It involves the release of chemical messengers, called signaling molecules, that bind to receptors on the surface of target cells and trigger a cellular response.

Growth factors are not a type of signaling molecule, but rather a type of protein that stimulates the growth and division of cells.