BMB 211

Look at the structures of the following molecules, which one do you think can diffuse most rapidly through a phospholipid bilayer ? Which one most slowly? ANS Urea (Most Rapid) and Lysine (Slowest) Which of the following statements about the mechanism of the Na+/K+ pump is correct? ANS The Na+/K+ ATPase uses energy to pump 3 Na+ outside the cell and 2 K+ inside. During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for: ANS Complex I...

All Life Obeys the Same Chemical and Physical Laws: What Are They? ANS 1) Life is complex and dynamic. 2) Life is organized and self-sustaining. 3) Life is cellular. 4) Life is information-based. 5) Life adapts and evolves. How is life organized? ANS Atom -> Molecule -> Organelle -> Cell -> Tissue -> Organ -> Organ System What are functional groups of organic biomolecules? ANS Most organic molecules are derived from hydrocarbons. Hydrocarbons are carbon and hy...

T/F: Proteins are involved in many building reactions both catabolic and anabolic ANS True Receptors, antibodies— are.... ANS proteins Name the amino acid that is achiral: ANS glycine why is glycine achiral? ANS 2 hydrogen A-chiral= ANS Not 4 different side groups attached to center amino acid; no asymmetric carbon atom Name the amino acid that has S as part of its side group and is able to form disulfide bonds: ANS cystein

What are catalysts? ANSWER catalysts enhance rate of chemical reaction, but are not permanently altered by the reaction Are enzymes organic in nature? ANSWER yes, they are biological and all enzymes are catalysts, but not all catalysts are enzymes What are non-enzymatic catalysts? ANSWER Inorganic compounds What are Enzymes?

When you digest dietary fat the fat is packaged into chylomicrons by enterocytes (small intestinal cells). Where does the chylomicron go after first leaving the enterocyte? Hepatic artery Aorta Lymph duct Hepatic vein ANS lymph duct The breakdown of triacylglycerol molecules into free fatty acids occurs in which cell? Adipocytes RBCs Hepatocytes Whatever cell is using the fat as fuel ANS adipocytes (fat cells) Hepatocytes (liver cells) and adipocytes (fat cells) have very dif...