A pairs only with T. C pairs only with G. The nucleotides in one strand The two strands of DNA are held together by hydrogen bonds (dotted lines) between the bases. Nucleotides are linked together by covalent bonds to form one strand of DNA. Phosphate Sugar (deoxyribose) are paired with the nucleotides in the complementary strand. Sugar-phosphate Base Nucleotide Nucleotide bases: Adenine Thymine Guanine Cytosine
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.
| Q1: Name two base pairs. Q2: Why is the DNA structure referred to as a “ladder”? What part of the DNA represents the rungs of the ladder? What part represents the sides? Q3: Is the hydrogen bond that holds the base pairs together a strong or weak |
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