BIOL 1306 Test 1 - Questions and Answers

BIOL 1306 Test 1 - Questions and Answers Molecules which are amphipathic, means they __________. are composed of a hydrophilic (polar) region and a hydrophobic (non-polar) region. Most chemical reactions of the body occur in _______. Water Blood NaCl the stomach None of the above The biochemical properties of phospholipids affect the fluidity of the plasma membrane. All the following factors contribute to making the plasma membrane more fluid EXCEPT Short hydrocarbon tails. The presence of double bonds (kinks) within the hydrocarbon tails. The lateral movement of phospholipids in the bilayer. The presence of cholesterol in the plasma membrane. All the above factors contribute to making the plasma membrane more fluid. The polysaccharide found in animal cells is _____. Glycogen The Octet Rule that governs the orbital shells of atoms, applies to all shells of an atom. False Water is a polar molecule making it a good solute. False Some plants, like potatoes, store polysaccharides as ________. Starch A hypothesis is _____________. A tentative answer to a question formed by observation; a proposed idea that can be tested. A covalent bond between two atoms is likely to be polar if ___________. One of the atoms is more electronegative (more negatively charged) than the other. The scientific name for humans is Homo sapiens. The name Homo is the _____ to which humans are classified. genus Which of the following represents the correct order of the classification hierarchy from most inclusive to least inclusive? Domain, kingdom, phylum, class, order, family, genus, species The complete genetic makeup of an organism is called the ________ Genome Which is NOT a function of lipids? Store energy. Cushions vital organs. Forms steroid hormones. Contributes to the fluidity of plasma membrane. All the above are functions of lipids. All the following statements are true regarding the sugar in DNA EXCEPT The sugar in DNA is a hexose sugar, and the sugar in RNA is a pentose sugar. The sugar in DNA has 5 carbon atoms. The sugar in DNA has 4 oxygen atoms. The sugar in DNA is not the same as the sugar in RNA. The sugar in DNA is deoxyribose. The most diverse group of prokaryotic cells are Archeans. False All the following are true regarding cholesterol EXCEPT Cholesterol is a lipid. Cholesterol is the precursor for all other steroids. Cholesterol us a molecule consisting of 4 fused rings. Cholesterol contributes to the fluidity of the plasma membrane by making it more fluid. All the above statements are true regarding cholesterol. In an atom, the further away an electron moves away from the nucleus, the more energy it has. True All the following statements are true regarding Science EXCEPT Science is a series of never-ending questions. The truth of Science is always changing. Science can never be considered "settled". Science is True whether you believe it or not. Science and technology evolve together.