Tham khảo tài liệu 'sat ii biology episode 1 part 4', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CHEMISTRY ATOMS AND COMPOUNDS polar nature of water and refer to the fact that it attracts polar substances. Choices C through E also reflect interactions that result from the polar nature of water. 8. The correct answer is E . The hydrogen bonds formed in biological molecules refers to the positive nature of available hydrogens such as those found in the bases of nucleic acids that promote the nucleotide base pairing. In addition electrostatic forces are often associated with molecule-molecule binding such as that found in enzyme substrate complexes. Finally choices C and D represent large forces and therefore do not fit the nature of the question posed. 9. The correct answer is B . A peptide bond formed when two amino acids are joined occurs at the site where the amino group NH2 of one amino acid and the carboxyl group COOH are bonded. One H1 of the amino group is removed and coupled with an OH- from the carboxyl group to form water which is removed from the molecule leaving two amino acids bonded together. Choice B indicates the arrows that show these bonding situations. 10. The correct answer is D . Assembling the four fragments in the following way lys-trp-arg arg-pro-gln pro-gln-his-lys lys-asp-ala-gly lys-trp-arg-pro-gln-his-lys-asp-ala-gly indicates that choice D is the correct answer. Peterson s SAT II Success Biology E M CHAPTER 1 Vocabulary acidic adhesion amino acids atom basic carbohydrates cellulose chemical reaction cohesion compound condensation dehydration synthesis deoxyribonucleic acid dipeptide disaccharides electron elements fat glucose glycogen hydrogen bonds hydrolysis hydrophilic hydrophobic lipids monosaccharides neutron nucleic acids nucleotides nucleus organic compounds oxidation peptide bond phospholipids pH scale polypeptide polysaccharides protein proton reactants reduction ribonucleic acid specific heat starch synthesis Peterson s SAT II Success Biology E M Chapter 2 CELLS ORGANIZATION AND .
