56. Name the line indicated by tag #56? 57. Name the structure/ line indicated by the tag #57? 58. Identify the whole structure indicated by the tag 58? 56 57 58 58
Nucleotides
It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Nucleic Acids
Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.
Skeletal muscles are composed of elongated, narrow, cylindrical fibres called muscles fibres. These fibres are unbranched and their ends are blunt. Each skeletal muscle is syncytial or multinucleated with characteristic cross striations. The plasma membrane covering the fibre is called sarcolemma whereas their cytoplasm is called sarcoplasm. Sarcoplasm of each muscle fibre consists of long, proteinaceous fibrils called myofibrils.
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