Chapter 2, Problem 9LE

RECALL Give three examples of DNA palindromes.

RECALL Which of the following statements is (are) true? (a) The two strands of DNA run parallel from their 5' to their 3'ends. (b) An adeninethymine base pair contains three hydrogen bonds. (c) Positively charged counterions are associated with DNA. (d) DNA base pairs are always perpendicular to the helix axis.

Calculating human genome If 1.5 percent of the human genome consists of protein-coding sequences, and the entire genome has 3.2x10^9, how many codons are there in the human genome? Remember that a codon is three nucleotides in length.

Biochemical Connection - What is the relationship between Sports and Metabolism

DNA True or false A long chain polymer in which the internucleotide linkages are of the diester type between C-3’ and C-5’ Hydrolyzed by weak alkali (pH 9 to 100°C) Different from RNA since in the latter the internucleotide linkages are between C-2’ and C-5 Usually present in tissues as  a nucleoprotein and cannot be separated from its protein component

RECALL Which of the following statements is (are) true? (a) Bacterial ribosomes consist of 40S and 60S subunits. (b) Prokaryotic DNA is normally complexed with histones. (c) Prokaryotic DNA normally exists as a closed circle. (d) Circular DNA is supercoiled

RECALL State why the following terms are important in biochemistry: polymer, protein, nucleic acid, catalysis, genetic code.

RECALL Describe the cloning of DNA.

DNA: Using the two deoxynucleotides you chose, draw the two monomers bound together into a compound, and label a phosphodiester bond.