Biology 151 biomolecules Exam A+ Pass

Biology 151 biomolecules Exam A+ Pass What are the four basic bio molecules? - Answer - Carbohydrates Proteins Nucleic Acids Lipids Water fearing - Answer - Hydrophobic Water loving - Answer - Hydrophillic A molecule with the chemical formula C6H12O6 is probably a Select one: a. carbohydrate. b. lipid. c. monosaccharide d. carbohydrate and lipid only. e. carbohydrate and monosaccharide only. - Answer - e An enzyme is likely to be what kind of biomolecule? Select one: a. A nucleic acid b. A lipid c. A carbohydrate d. A protein - Answer - d Lactose, a sugar in milk, is composed of one glucose molecule joined to one galactose molecule. How is lactose classified? Select one: a. as a pentose b. as a hexose c. as a monosaccharide d. as a disaccharide e. as a polysaccharide - Answer - d The long hydrocarbon fatty acid tail of a phosopholipid is Select one: a. hydrophilic b. hydrophobic c. amphipathic d. It depends - Answer - b What are the three components of a nucleotide? Select one or more: a. Phosphate b. Ribose sugar c. A nitrogenous base d. An amino acid - Answer - a,b,c What are the three elements present in all carbohydrates? Select one or more: a. Carbon b. Hydrogen c. Oxygen d. Nitrogen e. Phosphate - Answer - a,b,c What type of bond links amino acids into a protein chain? - Answer - peptide bond Is water polar or non polar - Answer - polar A polar molecule in which a concentration of positive electron charge is separated from a concentration of negative charges. - Answer - dipole ______ molecules are more likely to be symmetrical - Answer - non polar In ______ the pentose sugar is deoxyribose (H) while in ______ the pentose sugar is ribose (OH). - Answer - DNA, RNA Nucleotides are the _________ of nucleic acids. - Answer - monomers Researchers can examine the relative size of pieces of DNA by separating a mixture inside a gel - kind of like a slab of jello. They use electricity to do this. Essentially one end of the gel is connected to the positive lead from a power supply and the other is connected to the negative lead. You load the DNA at one end and it moves through the gel. Why might this work? A. The electrical current will carry the DNA along like a boat of a river. B. The DNA is negatively charged so will move towards the positive electrode. C. The DNA is positively charged so will move towards the positive electrode. D. The DNA is negatively charged so will move towards the negative electrode. E. The DNA is positively charged so will move towards the positive electrode. F. The electricity is strong like bear. - Answer - B