Which location best describes where protons are able to build up at high concentration, as shown in the animation?

Question

BlackTom AI · Accepted Answer

To approach this question, consider where the proton gradient is established in the mitochondrial membrane system.
Option 1: the cytoplasm. While the cytoplasm is the fluid inside the cell outside mitochondria, protons are actively pumped across the inner mitochondrial membrane into the intermembrane space, not into the cytoplasm. Therefore, the cytoplasm is not the site of high proton concentration created by the respiratory chain.
Option 2: the mitochondrial matrix. The matrix is the space enclosed by the inner membrane, inside the mitochondrion. Protons are not accumulated here to build the gradient; instead, protons are pumped across into the intermembrane space, and the matrix has relatively lower proton concentration compared to the intermembrane space.
Option 3: the intermembrane space. This is the compartment between the inner mitochondrial membrane and the outer membrane, where protons are actively transported to create a high proton concentration. The proton motive force that drives ATP synthesis is established across this membrane by the gradient between the intermembrane space (high H+) and the matrix (lower H+).
In summary, the animation depicts protons accumulating in the intermembrane space, establishing the electrochemical gradient used by ATP synthase to generate ATP.

Which location best describes where protons are able to build up at high concentration, as shown in the animation?

查看解析

登录即可查看完整答案

类似问题

Flow of ______ directly through ATPase subunits causes their rotation, in turn directly leading to ATP synthesis.

Which of the following statements is correct?

Question at position 34 What provides energy to ATP synthase?hydrogen (H+) gradientP680P700ATPsunlight

_______ is a process found in both photosynthesis and cellular respiration.

Which statement describes features shared by both chloroplasts and mitochondria?

The b6-f complex generates a proton gradient by using the energy obtained from the electrons that pass through the complex. These protons are pumped into the thylakoid space . They move to the enzyme ATP synthase where they travel down their concentration gradient, which generates ATP .

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单