Sketch the explains the structure of dna and various types of rna
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The most important feature of DNA is that it is usually composed of
two polynucleotide chains twisted around each other in the form of a
double helix (Figure 6-1). The upper part of the figure (a) presents the
structure of the double helix shown in a schematic form. Note that if
inverted 180° (for example, by turning this book upside-down), the
double helix looks superficially the same, due to the complementary
nature of the two DNA strands. The space-filling model of the double
helix, in the lower part of the figure (b), shows the components of the
DNA molecule and their relative positions in the helical structure.
The backbone of each strand of the helix is composed of alternating
sugar and phosphate residues; the bases project inward but are accessible through the major and minor grooves.
Messenger RNA (mRNA) mRNA accounts for just 5% of the total RNA in the cell. ...Ribosomal RNA (rRNA) rRNAs are found in the ribosomes and account for 80% of the total RNA present in the cell. ...Transfer RNA (tRNA) tRNA is the smallest of the 3 types of RNA having about 75-95 nucleotides.
two polynucleotide chains twisted around each other in the form of a
double helix (Figure 6-1). The upper part of the figure (a) presents the
structure of the double helix shown in a schematic form. Note that if
inverted 180° (for example, by turning this book upside-down), the
double helix looks superficially the same, due to the complementary
nature of the two DNA strands. The space-filling model of the double
helix, in the lower part of the figure (b), shows the components of the
DNA molecule and their relative positions in the helical structure.
The backbone of each strand of the helix is composed of alternating
sugar and phosphate residues; the bases project inward but are accessible through the major and minor grooves.
Messenger RNA (mRNA) mRNA accounts for just 5% of the total RNA in the cell. ...Ribosomal RNA (rRNA) rRNAs are found in the ribosomes and account for 80% of the total RNA present in the cell. ...Transfer RNA (tRNA) tRNA is the smallest of the 3 types of RNA having about 75-95 nucleotides.
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