Which complex in the electron transport chain converts O2 to H2O?  

The number of ATP molecules produced by oxidative phosphorylation is imprecise due to variability in the structure and function of ATP synthase. Which of the following factors contributes to this imprecision? Contextual Information:The number of ATP molecules produced by oxidative phosphorylation is imprecise due to variability in the number of subunits in the c-ring of the Fo region of ATP synthase. The c-ring can have between 8 and 15 subunits, with each subunit requiring 1 proton for rotation. A full 360-degree rotation of the c-ring produces 3 ATP molecules. Therefore, the proton-to-ATP ratio depends on the number of c-ring subunits. For example: If the c-ring has 10 subunits, it requires 10 protons for one full rotation. Since 3 ATP molecules are produced per rotation, the proton-to-ATP ratio is 10 ÷ 3 ≈ 3.33 protons per ATP. If the c-ring has 12 subunits, it requires 12 protons for one full rotation. The proton-to-ATP ratio is 12 ÷ 3 = 4 protons per ATP. If the c-ring has 8 subunits, it requires 8 protons for one full rotation. The proton-to-ATP ratio is 8 ÷ 3 ≈ 2.67 protons per ATP. Additionally, for each NADH, approximately 10 protons are pumped across the inner mitochondrial membrane, while about 6 protons are pumped for each FADH₂. The variability in the number of c-ring subunits and the protons pumped by NADH and FADH₂ contribute to the imprecision in calculating ATP yield.

What is the net production of ATP, pyruvate, and NADH when one molecule of glucose undergoes glycolysis?

Which of the following is a function of ubiquinone (coenzyme Q) in oxidative phosphorylation?

During the electron transport chain, protons are pumped out of the matrix of the mitochondria at all major sites, except:

Please review the figures below. Which combination of subunits of the ATP synthase rotates?   A B

A hinge joint would be considered which of the following? (only one correct answer!)

Reading #2 | Question 2 In paragraph B, what does the phrase stay in the loop mean?

Transitions INSTRUCTIONS: Read each sentence, and match each underlined transition word or phrase with its purpose. Furthermore, in those brief moments in which we are offline, we often make it a priority to get back online as quickly as possible. [answer1]  Indeed, one of the first pieces of information that anyone seeks when entering a cafe, hotel, or shopping mall is the Wi-Fi password. [answer2] As a result, many people have chosen to do whatever it takes to continuously stay in the loop. [answer3] By contrast, in our current age, evenings and weekends have become fair game. [answer4] It must be said, however, that such remedies are only temporary escapes. [answer5]

Reading #2 | Question 1 What is the main idea of the first paragraph?