Transports electrons from complex I AND Complex II to complex III in the ETs. a.
ID: 91921 • Letter: T
Question
Transports electrons from complex I AND Complex II to complex III in the ETs. a. Cytochrome-e b. Ubiquinone c. NADH d. Oxygen e. -CoASH Which of the following molecules can be utilized as "metabolic fuel?" 1. Glucose 2. Palmitate (a fatty acid) 3. Adenosine monophosphate (a nucleotide) 4. Glycine (an amino acid) 5. Acetyl-CoA 6. ketone bodies a. 1, 3, 4, 6 b. 1, 2, 3, 5 c. 2, 4, 5, 6 d. 1, 4, 5 e. All of the above Which of the following reactions liberates CO_2? 1. Pyruvate rightarrow Acetyl-CoA 2. Succinate rightarrow Fumarate 3. Malate rightarrow Oxaloacetate 4. DHAP rightarrow G3P 5. Isocitrate rightarrow alpha-ketoglutarate 6. alpha-ketoglutarate rightarrow Succinyl-CoA a. 1, 2, 3 b. 2, 4, 6 c. 1, 5, 6 d. 1, 2, 3, 5 e. 1, 2, 3, 5, 6 Which of the following play a role in Acid-Base balance or homeostasis? 1. DCT 2. VRG 3. Central pH chemoreceptors 4. Collecting ducts 5. Hemoglobin 6. pCO_2 a. 1, 2, 3 b. 1, 3, 5, 6 c. 2, 3, 4, 5 d. 1, 3, 4, 5, 6 e. All of the above The usual number of oxygen molecules loaded & unloaded from hemoglobin during "resting" or "quiet" respiration is ____ a. All four b. three c. only one d. two e. extremely variable so that all of the above could be the answerExplanation / Answer
Answer to Question 81:
b. Ubiquinone
There are four protein complexex in ETC, Complex I,II,III and IV
Complex I pumps four hydrogen ions across the membrane from matrix into the intermembrane space.
Complex II delivers additional electrons into the quinone pool
Ubiquinone accepts electrons from both the complexes and transports to complex III.
Answer to Question 82: E
Glucose is the general metabolic fuel, that is readily metabolised by any cell.
Palmitate undergoes oxidation (mitochondrial oxidation of fatty acids) and produce Acetyl Co-A.
Glycine is used as a metabolic fuel in gastro intestinal tract. It is used in the synthesis of products like bile and nucleic acids.
AMP formed by adenylate kinase is a metabolic fuel in the body.
Acetyl Co-A delivers acetyl group to Kreb's cycle , which is oxidized for energy production. It is a molecule which participates in many reactions of carbohydrate, protein and lipid metabolism.
Ketone bodies are produced by liver from fatty acids during fasting (low food intake). They are converted to Acetyl Co- A which enters the Kreb's cycle., oxidized in mitochondria and generate energy.
Hence the answer is E.
Answer to Question 83: C
Pyruvate, the end product of glycolysis is converted to Acetyl Co-A which enters Kreb's cycle.
The reaction liberates CO2
Succinate to fumarate in citric acid cycle is a dehydrogenation reaction which does not liberate CO2
Similarly malate to oxaloacetate is a dehydrogenation reaction which does not liberate CO2
Isocitrate to alpha keto glutarate is an oxidative decarboxylation reaction which liberate CO2
alpha keto glutarate to succinyl Co- A is an oxidative decarboxylation reaction which liberate CO2
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