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Home⇒ Medical Science⇒ Biochemistry⇒ Water ph and macromolecules
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Hydrogen bonds and hydrophilic interactions are types of weak chemical bonds that link together separate molecules [other wrong options] [Discuss in forum] weak chemical bonds that hold together the atoms within a molecule strong chemical bonds that hold together the atoms within a molecule strong chemical bonds that link together separate molecules |
Q22 ⇒ The reason that fats contain more energy than simple sugars, is fats have many more covalent bonds [other wrong options] [Discuss in forum] carbon atoms hydrogen atoms hydrogen bonds |
Q23 ⇒ A Bronsted acid becomes __________ upon losing a proton. its conjugate base [other wrong options] [Discuss in forum] highly reactive its conjugate acid a hydronium ion |
Q24 ⇒ Who discovered and described the blood groups (ABO) classification? Karl Landsteiner [other wrong options] [Discuss in forum] Theodor Kocher Otto Warburg Karl Hooper |
Q25 ⇒ The dissociation constant of H2O at 25° C is 10-14 M [other wrong options] [Discuss in forum] 1014 M 10-7 M 107 M |
Q26 ⇒ Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages. covalent [other wrong options] [Discuss in forum] noncovalent ionic hydrogen |
Q27 ⇒ A compound that is capable of forming hydrogen bonds with water contains at least some polar covalent bonds [other wrong options] [Discuss in forum] is probably held together by noncovalent bonds should act as a good buffer for acids and bases does not dissolve well in water |
Q28 ⇒ The strength of an acid depends on electronegativity [other wrong options] [Discuss in forum] number of neutrons gain number of double bonds number of protons released |
Q29 ⇒ The reactions of molecules are the reactions of the functional groups [other wrong options] [Discuss in forum] are independent of the functional groups require an enzyme in all cases all of the above |
Q30 ⇒ Which of the following acid/base pairs act as natural buffers in living systems? All of these [other wrong options] [Discuss in forum] H2CO3/HCO3- H2PO4-/HPO42- Histidine+/histidine |
Q31 ⇒ The lone pair electrons on oxygen in a H20 molecule carry a partial negative charge [other wrong options] [Discuss in forum] carry a partial positive charge are not important for the properties of water form covalent bonds in ice |
Q32 ⇒ Which of the following will easily dissolve in a polar solvent? sodium chloride [other wrong options] [Discuss in forum] gasoline (heptanes & octanes) methane argon |
Or |