Which is a difference between an alpha-helix and a beta-pleated sheet? Select one: a. An alpha-helix contains mainly amino acids with polar R-groups while a beta- pleated sheet contains mainly amino acids with non-polar R-groups. b. An alpha-helix contains disulfide bonds while a beta-pleated sheet contains ionic bonds. c. An alpha-helix has non-covalent bonds between amino acids near each other in the sequence while a beta-pleated sheet has non-covalent bonds between amino acids far apart in the sequence. d. An alpha-helix has a spiral shape while a beta-pleated sheet has a compact zig-zag shape.
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.
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