Question

1. dna vs rna (1.6) make a venn diagram comparing dna and rna.
2. nucleic acid structure (1.5) diagram a dna molecule consisting of at least 2 base pairs including all nitrogenous bases. circle a nucleotide, and label sugar, phosphate, and nitrogenous base. draw the correct hydrogen bonding between the base pairs. label 5 and 3 ends. label a purine and pyrimidine.

Explanation:

1. For comparing DNA and RNA in a Venn - diagram: DNA and RNA are both nucleic acids. DNA is double - stranded (usually) and has deoxyribose sugar, while RNA is single - stranded and has ribose sugar. They both have nitrogenous bases, but DNA has thymine and RNA has uracil.
2. For diagramming a DNA molecule: A DNA molecule consists of two strands held together by hydrogen bonds between base pairs. The four nitrogenous bases are adenine (A), thymine (T), guanine (G), and cytosine (C). Adenine pairs with thymine via two hydrogen bonds, and guanine pairs with cytosine via three hydrogen bonds. A nucleotide is composed of a sugar (deoxyribose), a phosphate group, and a nitrogenous base. Purines are adenine and guanine, and pyrimidines are thymine and cytosine. The 5' end has a phosphate group attached to the 5th carbon of the sugar, and the 3' end has a hydroxyl group on the 3rd carbon of the sugar.

Answer:

1. For the Venn diagram: Draw two overlapping circles. In the left - circle (DNA): write "double - stranded", "deoxyribose sugar", "thymine". In the overlapping part: write "nucleic acid", "phosphodiester bonds", "adenine", "guanine", "cytosine". In the right - circle (RNA): write "single - stranded", "ribose sugar", "uracil".
2. For the DNA molecule diagram: Draw two parallel lines representing the sugar - phosphate backbones. Place the base pairs (A - T and G - C) between the lines with the correct number of hydrogen bonds. Circle one nucleotide, label the sugar (deoxyribose), the phosphate group, and the nitrogenous base. Mark the 5' and 3' ends on the appropriate ends of the strands. Label a purine (e.g., adenine or guanine) and a pyrimidine (e.g., thymine or cytosine).