AP Biology Unit 1 Practice Test MCQ

AP Biology Unit 1 Practice Test MCQ Amino acids are acids because they always possess which functional group? a) amino b) carbonyl c) carboxyl d) phosphate e) hydroxyl c) carboxyl Which of the following is an example of hydrolysis? a) the reaction of two monosaccharides, forming a disaccharide with the release of water b) the synthesis of two amino acids, forming a peptide with the release of water c) the reaction of a fat, forming glycerol and fatty acids with the release of water d) the reaction of a fat, forming glycerol and fatty acids with the consumption of water e) the synthesis of a nucleotide from a phosphate, a pentose sugar, and a nitrogenous base with the production of a molecule of water d) the reaction of a fat, forming glycerol and fatty acids with the consumption of water Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic material but do not have their DNA encased within a nuclear envelope? a) animal b) plant c) archaea d) fungi e) protist c) archaea From its atomic number of 15, it is possible to predict that the phosphorus atom has a) 15 neutrons b) 15 protons c) 15 electrons d) 8 electrons in its outermost shell e) 15 protons and 15 electrons e) 15 protons and 15 electrons Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins? a) hydrophobic interactions b) disulfide bonds c) ionic bonds d) hydrogen bonds e) peptide bonds d) hydrogen bonds Normal hemoglobin is a tetramer, consisting of two molecules of β hemoglobin and two molecules of α hemoglobin. In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and assemble into large fibers. Based on this information alone, we can conclude that sickle-cell hemoglobin exhibits a) altered primary structure. b) altered secondary structure. c) altered tertiary structure. d) altered quaternary structure. e) altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered. e) altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered. The partial negative charge in a molecule of water occurs because a) the oxygen atom acquires an additional electron. b) the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom's nucleus than around the hydrogen atom's nucleus. c) the oxygen atom has two pairs of electrons in its valence shell that are not neutralized by hydrogen atoms. d) the oxygen atom forms hybrid orbitals that distribute electrons unequally around the oxygen nucleus. e) one of the hydrogen atoms donates an electron to the oxygen atom. b) the electrons shared between the oxygen and hydrogen atoms spend more time around the