MISC 06 - Finals Quiz Flashcards
Which of the following is NOT TRUE for polysaccharides?
a. Only cellulose is not digested by humans because of the β-1,4-glycosidic bond
b. Starch, glycogen, and cellulose are made up of glucose
c. Both starch and glycogen have α-glycosidic bond
d. Both glycogen and cellulose have β-1,4-glycosidic bond
d. Both glycogen and cellulose have β-1,4-glycosidic bond
Which of the following is true for ATPase?
a. The subunits containing the active site of ATPase rotates and synthesizes ATP when protons are pumped out from the matrix to the intermembrane space
b. The subunits containing the active site of ATPase rotates and synthesizes ATP when NADH is produced via oxidative phosphorylation
c. The subunits containing the active site of ATPase rotates and synthesizes ATP when protons return to the matrix from the intermembrane space
d. The subunits containing the active site of ATPase rotates and synthesizes ATP when FADH2 is produced via oxidative phosphorylation
c. The subunits containing the active site of ATPase rotates and synthesizes ATP when protons return to the matrix from the intermembrane space
Absorption of macronutrients happen in the:
a. Mouth
b. Stomach
c. Large intestine
d. Small intestine
d. Small intestine
The reduction of NADH and FADH2 in the electron transport system
a. Creates the proton gradient between the intermembrane space and the mitochondrial matrix
b. Sends ATP into the cytoplasm
c. Sends ATP to the mitochondrial matrix
d. Favors anaerobic respiration
a. Creates the proton gradient between the intermembrane space and the mitochondrial matrix
Which toxic substance is produced from methanol by alcohol dehydrogenase?
a. Formaldehyde
b. Acetaldehyde
c. Ethanol
d. Acetic acid
a. Formaldehyde
Which of the following is the final electron acceptor in the electron transport system?
a. Water
b. Oxygen
c. Carbon dioxide
d. Coenzyme Q
b. Oxygen
Which metabolic respiration is active in yeast?
a. Aerobic respiration
b. Alcohol fermentation
c. Glycolysis
d. Lactic acid fermentation
b. Alcohol fermentation
Which of the following steps in the citric acid cycle does not produce ATP equivalents that enters the electron transport system?
a. Succinate → fumarate
b. Isocitrate → α-ketoglutarate
c. Citrate → isocitrate
d. Malate → oxaloacetate
c. Citrate → isocitrate
Chemical digestion starts in the oral cavity
a. True
b. False
a. True
Which of the following steps in metabolism produces ATP via substrate level phosphorylation?
a. α-Ketoglutarate → succinyl CoA
b. Phosphoenol pyruvate → pyruvate
c. Fumarate → malate
d. 1,3-bisphophoglycerate → 3-phosphoglycerate
d. 1,3-bisphophoglycerate → 3-phosphoglycerate
Which enzyme catalyzes the conversion of glucose to glucose-6-phosphate?
a. Hexokinase
b. Glucose-6-phosphate dehydrogenase
c. Phosphofructokinase
d. Glucose phosphate isomerase
a. Hexokinase
Which condition will favor lactic acid fermentation?
a. Lack of water
b. Lack of ATP
c. Lack of oxygen
d. Lack of carbon dioxide
c. Lack of oxygen
How many ATPs are produced when 1 molecule of glucose is completely oxidized (form glycolysis to Kreb’s cycle) when the shuttle system used is the Malate-Aspartate shuttle?
a. 36
b. 38
c. 30
d. 32
b. 38
Which enzyme catalyzes conversion of pyruvate to acetyl CoA?
a. Pyruvate decarboxylase
b. Citrate synthase
c. Pyruvate dehydrogenase
d. Pyruvate kinase
c. Pyruvate dehydrogenase
Which step in the glycolysis utilizes ATP?
a. Fructose-6-phosphate → fructose-1,6-biphosphate
b. Glyceraldehyde-3-phosphate → dihydroxyacetone phosphate
c. Glyceraldehyde-3-phosphate Fructose-6-phosphate → fructose-1,6-biphosphate Biphosphoglycerate
d. 1,3-Biphosphoglycerate → 3-phosphoglycerate
a. Fructose-6-phosphate → fructose-1,6-biphosphate
