Your body produces lactic acid under anaerobic conditions. What is the purpose of your body producing lactic acid? Select one: a. Lactic acid serves no purpose other than to regulate NAD+. b. Lactic acid combines with co-enzyme A, and then enters the citric acid cycle once O2 becomes available. c. The purpose of Lactic acid is the increase acidity in your blood. d. Lactic acid is utilized as a fuel source by our muscles.

Your body produces lactic acid under anaerobic conditions. What is the purpose of your body producing lactic acid? Select one: a. Lactic acid serves no purpose other than to regulate NAD+. b. Lactic acid combines with co-enzyme A, and then enters the citric acid cycle once O2 becomes available. c. The purpose of Lactic acid is the increase acidity in your blood. d. Lactic acid is utilized as a fuel source by our muscles.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter4: How Cells Obtain Energy

Section: Chapter Questions

Problem 9RQ: What do the electrons added to NAD do? a. They become part of a fermentation pathway. b. They go to...

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In the Alanine Cycle, different organs work together to produce glucose from protein. Which statement below best describes what happens in which organ? a)In liver, pyruvate is transaminated to alanine; in the muscle, alanine is deaminated and pyruvate is used for ATP synthesis. b)In muscle, pyruvate is transaminated to alanine; in the liver, alanine is deaminated and pyruvate is used for gluconeogenesis. c)The liver exports glucose for use by the brain; in the muscle, alanine is deaminated by the urea cycle for use in ATP generation. d)In muscle, pyruvate is transaminated to alanine; in the liver, alanine enters the urea cycle for excretion.
The function of the citric acid cycle is to (a) produce energy during periods of active muscle contraction. (b) break six-carbon chains into three-carbon fragments. (c) prepare the glucose molecule for further reactions. (d) remove hydrogen atoms from organic molecules and transfer them to coenzymes.
a) What is the process by which cells generate ATP through a series of redox (chemical) reactions called? How many ATPs generated through this process from one Glucose molecule? b) What does cellular respiration accomplish for the cell? c) What happens to the NADH produced in glycolysis? Why does it need to get into the mitochondria? d) Write the role of O2 in cellular respiration. e) What happens to our body’s enzyme activity during fever? f) What is the difference between apo-enzyme and holo-enzyme? g) What is meant by the term specificity in relation to enzyme activity? h) If humans evolved from apes, why are there still apes? i) What are the risk factors of type 2 diabetes? j) Why was Lamarck wrong about giraffes?
a. Starting with acetyl-CoA in the mitochondria, how many ATP molecules are needed to synthesize a 14 C fatty acid? A. 3 B. 6 C. 9 D. 12 b. How many FADH2 molecules will be obtained from the complete oxidation of Myristic acid to CO2 ? A. 13 B. 11 C. 15 D. 17 c. If the complete oxidation of a saturated fatty acid result in the production of 82 ATP molecules, how many ATP molecules will be obtained from a mono-unsaturated fatty acid of similar length? A. 80.5 B. 82 C. 84.5 D. 83.5
Which of these is not true of the citric acid cycle?a. The citric acid cycle includes the prep reaction.b. The citric acid cycle produces ATP by substrate-level ATPsynthesis.c. The citric acid cycle occurs in the mitochondria.d. The citric acid cycle produces two ATP per glucose molecule.
How will the cell shift its metabolic processes in response to the level of pyruvate and in order to produce ATP? A. It will shift from aerobic respiration to fermentation B. It will shift from aerobic respiration to anaerobic respiration C.It will continue with aerobic metabolism using oxygen in the cytosol to make ATP D. It will shift from anaerobic respiration to fermentation
What might you expect if a mutation caused the ATP-allosteric site on phosphofructokinase to be permanently inactive? a. Less glucose transported into the cell. b. No effect on ATP production. c. Decreased ATP production d. Excessive ATP production.
Which of the following statements is true? A. The citric acid cycle occurs in the mitochondria matrix B. The citric acid cycle occurs in the cytosol C. Electron transport chain and ATP synthase are in the cytosol D. Oxidative phosphorylation occurs in the mitochondria matrix
Which statement is an accurate comparison of aerobic and anaerobic respiration in humans? A: Aerobic respiration occurs in the cytoplasm and mitochondria, whereas anaerobic respiration occurs only in the cytoplasm B: Aerobic respiration primarily uses carbohydrates to produce energy, while anaerobic respiration uses lipids C: Aerobic respiration produced ATP as the primary energy molecules, while anaerobic respiration produces ADP D: Aerobic respiration requires enzymes to facilitate its biochemical reactions, whereas anaerobic respiration does not use enzymes
Which of the following is NOT a physiological role of phosphorus? Select one: a. Required for ossification of bones during embryonic development b. Required for enzymatic conversions in glycolysis c. Links together ribose sugars and their associated nitrogenous bases d. Important compound required to inhibit auto-oxidation of fatty acids
What must occur before a fatty acid can be metabolized by cellular respiration? A)The fatty acids must be linked to glycerol and form a neutral fat. B)The fatty acid must be broken down into acetic acid, a two-carbon molecule. C)The fatty acid chain must be broken down into three-carbon molecules, pyruvic acid. D)The fatty acid must be broken down into amino acids before they can enter the Krebs cycle.
Which of the following statements concerning the location of the metabolic pathways is correct? a. All reactions of the glycolysis take place in the mitochondria. b. All reactions of the TCA cycle take place in the mitochondria. c. Some reactions of the TCA cycle take place in the cytosol, and some in mitochondria. d. Some reactions of the glycolysis take place in the cytosol, and some in mitochondria.