LSU Bio 1201 Final Exam Pomarico Questions and Answers Rated A+

LSU Bio 1201 Final Exam Pomarico Questions and Answers Rated A+ Which four elements make up 90% of life? C, H, N, O Does DNA have uracil or thymine? Thymine What is a macromolecule? Molecule made up of polymers What are the complementary base pairs in DNA A-T, G-C Which of the following are not pyrimidines? T, C, U, A, G A, G What causes an element to become an isotope? Change in # of neutrons What is an enantiomer? Two molecules that are mirror images of each other What characteristic is specific of tertiary structure? Interactions with side chains What is a hydrogen bond? A bond between a hydrogen with a partial positive & partial negative charge atom (usually oxygen and nitrogen) Spider walking on water is a result of Surface tension; cohesion Which of the following would most likely have a polar bond? CH, CO, OO, CN, NH CO and NH Products of cellular respiration CO2, water, energy What is the most important product of anaerobic respiration? Regeneration of NAD+ What happens to Co2 in the Calvin Benson cycle? Fixation/reduction; incorporation into sugar molecules Where does the most energy production occur in cellular respiration? Oxidative phosphorylation What are the properties of a proton compared to neutrons and electrons? Heavy, positive Which molecules can cross the membrane the easiest? Nonpolar, small Which isomer has a carbon-carbon double bond? Geometric/cis trans Why is carbon the most versatile organic element? Ability to make 4 bonds Which type of group would a hydroxyl group most likely bond to? Polar Which organelle synthesizes proteins? Rough ER Which organelle prevents future damage from happening? Lysosome What to cellulose, glycogen, and starch have in common? All derived from glucose Which property of water is the reason for many of water's other properties? Hydrogen bonding In DNA structure, what makes up the lateral movement of the structure but not the "stair steps"? Phosphate group + sugar