Aresearch group has discovered an organism with cells that contain a previously undescribed organelle. they do some tests on the isolated organelle to see if it is involved in any major metabolic reactions. to do this, they incubate these organelles for a period of time and determine changes in the amount of various substances in the suspending solution. the results follow.

glucose: none
co2: increase
o2: none
atp: increase
nadh: increase

based on this analysis, which part of cellular respiration do you conclude is taking place in this organelle?

a) pyruvate oxidation
b) citric acid cycle
c) glycolysis
d) electron transport chain/oxidative phosphorylation
e) glycolysis and the citric acid cycle

B) citric acid cycle

Explanation:

Citric acid cycle or Krebs cycle is a part of cellular respiration and occurs in mitochondria in eukaryotes. In this process oxidation of acetyl-coA ( which comes from carbohydrates, fats and proteins) takes place and energy is released.

Along with acetyl-coA, water is also used and in the end NAD+ is reduced to NADH, ATP is produced and by product CO2 is generated. ATP is used as a source of energy. NADH also enters electron transport chain in next stage for production of more ATP.

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.