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86) The chemical bond connecting one nucleotide to the next along one strand of a DNA molecule is called a A) peptide bond.                                       B) phosphate bond. C) glycosidic bond.                                  D) phosphodiester bond.

60) Macromolecules that are used by most organisms to store hereditary information are called: A) transfer RNA molecules.                             B) DNA molecules. C) proteins.                                                                D) ribosomal RNA molecules.

41) A codon is composed of how many bases? A) three B) two C) four D) 64

42) The Central Dogma of biology can be stated as A) proteins

The two oxygen atoms in oxygen gas (O2) share four electrons forming a _____.  A)  hydrogen bond                                                            B)  double covalent bond C)  single covalent bond                                                 D)  triple covalent bond

61) Biological membranes contain bilayers containing mostly ______. A) phospholipids                                    B) oils C) cholesterol                                         D) triglycerides

Which of the following statements about evolution is true?    A) Evolution only results in the addition of traits to existing organisms.    B) Evolution only results in the loss of traits from existing organisms.    C) Evolution can result in the addition or loss of traits in existing organisms.    D) Evolution has nothing to do with the addition or loss of traits.

Which of the following diagram represents metaphase I of meiosis? 

68) In aerobic respiration, chemiosmotic generation of ATP is driven by: A) PO4 transfer through the plasma membrane. B) the Na+/K+ pump. C) a difference in H+ concentration on the two sides of the inner mitochondrial membrane. D) osmosis of macromolecules.

56) Negatively charged subatomic particles that have almost no mass are called: A) neutrons.                                  B) electrons. C) ions.                                             D) protons.