Onu Biochem Exam 3

Front 1

If G of the reaction AB is -40 kj/mol under standard conditions the reaction the reaction will proceed spontaneously from left to right

Back 1

a

Front 2

If the reaction A+B C has a G of -29 kj/mol at 25 degrees Celsius starting under standard conditions one can predict at equilibrium the concentration of C will be greater than the concentration of A or B

Back 2

a

Front 3

All of the following contribute to the large negative free energy change upon hydrolysis of “high energy” compounds except Low activation energy of forward reaction (FALSE)

Back 3

a

Front 4

The hydrolysis of ATP has a large negative G^10 ; neverless ATP is stable in solution due to the hydrolysis reaction having a large activation energy

Back 4

a

Front 5

The conversion of 1 mol of fructose1,6 biphosphate to 2 mol of pyruvate by glycolysis pathway results in a net formation of 2 mol of NADH and 4 mol of ATP

Back 5

a

Front 6

When a muscle is stimulated to contract aerobically, less lactic acid is formed than when it contacts anerobically because under aerobic conditions most of the pyruvate generated as a result if glycolysis is oxidized by the citric acid cycle rather than reduced to lactate

Back 6

a

Front 7

Cofactor that participates directly in most of the oxidation-reduction reactions in the fermentation of glucose to lactate is NAD+/NADH

Back 7

a

Front 8

The steps of glycolysis between Glyceraldehyde 3-phosphate and 3-phosphoglycerate includes all the following except Oxidation of NADH to NADH+ (FALSE)

Back 8

a

Front 9

In comparison with the resting rate, actively contracting human muscle tissue has a higher rate of lactate formation

Back 9

a

Front 10

Fluidity of lipid bilayer increases with increasing temperature

Back 10

a

Front 11

In facilitated diffusion across membrane a specific membrane protein decreases activation energy for movement of solute through membrane

Back 11

a

Front 12

Specificity of potassium channel for K+ over Na+ is because differential interaction with selectively filter protein

Back 12

a

Front 13

Receptor enzymes contain enzyme activity that acts up cytosolic substrate

Back 13

a

Front 14

Serpentine receptors have multiple membrane spanning helical domains

Back 14

a

Front 15

Beta adrenergic have cyclic AMP synthesis, GDP replacement via GTP, cAMP dependant PKA, NOT increases Ca2+ concentration

Back 15

a

Front 16

Exergonic reaction goes forward so product concentration is greater than reactant concentration at equilibrium

Back 16

a

Front 17

Large negative free energy change contribute electrostatic repulsion in the reactant, stabilization of products by extra resonance, and ionization, NOT low activation energy of forward reaction

Back 17

a

Front 18

Tautomerization contributes most to hydrolysis of PEP are destabilization of reaction by electrostatic repulsion and stabilization of product via tautomerization

Back 18

a

Front 19

Glycolysis is catabolic

Back 19

a

Front 20

Reoxidation of NADH pyruvatelactate

Back 20

a

Front 21

Glycolysis is not endergonic

Back 21

a

Front 22

Glucoselactate needs NAD+/NADH

Back 22

a

Front 23

Acetate cannot start synthesis of glucose via glucogenesis in mammals n

Back 23

a

Front 24

The concentration of 2phosphoglycerate increases following interation of fluoride with enolase

Back 24

a

Front 25

In seed germination glyoxlate pathway is important because lets seed carry out net synthesis of glucose from acetyl CoA

Back 25

a