Every year, painted lady butterflies make huge migrations from Africa to Europe and back again. They also do this in North America, from Mexico to northern United States and Canada and back again. The migrations can be up to 15000 km long.ggs of the Painted Lady appear to be pale green in color. Caterpillars are grayish brown and darker at the ends. They have a yellow stripe running down the back of their body, and spikes along the back and sides of their body. Pupae can be a variety of colors including a metallic green, brown, or bluish-white.
The Helical Structure of DNA shows a single strand of DNA. However, as stated earlier, DNA exists as a double-helix, meaning two strands of DNA bind together. Figure %: Double-helical DNA As seen above, one strand is oriented in the 5' to 3' direction while the complementary strand runs in the 3' to 5' direction.
How are nucleotides held together vs how DNA strands in a DNA molecule are held together? The nucleotides are linked together covalently by phosphodiester bonds through the 3'-OH group of one sugar and the 5'-PO3 of the next, into polynucleotide chains. A DNA molecule is composed of two of these polynucleotide chains (DNA strands) which are held together by hydrogen bonds between the paired bases. DNA is wound into a _______ _______.