BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 6, Problem 4WIO
How might a mitochondrion's double membrane make
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How might a mitochondrion’s double membrane make cellularrespiration more efficient than if it had a single membrane?
Mitochondria are the powerhouse of the cell and feature a double membrane. A mutation was discovered in Drosophila melanogaster that prevented the formation of cristae in mitochondria. Which of the following would the researchers observe in Drosophila with this mutation?
H+ ions could not be pumped into the intermembrane space.
The components of the respiratory chain would not colocalize efficiently.
NADH2 could not be transported from the cytoplasm into the mitochondria.
Proteins synthesized in the cytoplasm would not be able to enter the mitochondria.
i and ii
i and iv
ii and iii
iii and iv
In the image below of a region of the mitochondria, which region would have the highest concentration of hydrogen ions?
Choose one from the following:
(a) A
(b) B
Chapter 6 Solutions
BIOLOGY
Ch. 6.1 - Why do all organisms need ATP?Ch. 6.1 - What are the three general ways to generate ATP...Ch. 6.1 - Prob. 3MCCh. 6.1 - Prob. 4MCCh. 6.2 - Prob. 1MCCh. 6.2 - What occurs in each of the three stages of...Ch. 6.3 - Prob. 1MCCh. 6.3 - Prob. 2MCCh. 6.4 - Prob. 1MCCh. 6.4 - Prob. 2MC
Ch. 6.4 - Prob. 3MCCh. 6.5 - Prob. 1MCCh. 6.5 - Prob. 2MCCh. 6.5 - Prob. 3MCCh. 6.5 - Prob. 4MCCh. 6.6 - Prob. 1MCCh. 6.6 - How does the actual ATP yield compare to the...Ch. 6.7 - Prob. 1MCCh. 6.7 - Prob. 2MCCh. 6.8 - Prob. 1MCCh. 6.8 - Prob. 2MCCh. 6.8 - Prob. 3MCCh. 6.9 - Prob. 1MCCh. 6.9 - Why must the first metabolic pathways have been...Ch. 6.9 - What is the evidence that photosynthesis may have...Ch. 6.10 - What hypothesis were the researchers testing, and...Ch. 6.10 - Prob. 2MCCh. 6 - Which of the following best describes aerobic...Ch. 6 - Which stage in cellular respiration produces the...Ch. 6 - What is the role of ATP synthase? a. It uses ATP...Ch. 6 - Prob. 4MCQCh. 6 - Prob. 5MCQCh. 6 - Fats can be broken down into acetyl CoA for use in...Ch. 6 - Prob. 7MCQCh. 6 - What is endosymbiosis? a. A type of fermentation...Ch. 6 - Respiration contains the Latin word root spiro,...Ch. 6 - All steps of cellular respiration are closely...Ch. 6 - How does aerobic respiration yield so much ATP...Ch. 6 - How might a mitochondrion's double membrane make...Ch. 6 - Health-food stores sell a product called pyruvate...Ch. 6 - At what point does O2 enter the energy pathways of...Ch. 6 - Prob. 7WIOCh. 6 - Describe the energy pathways that are available...Ch. 6 - Prob. 9WIOCh. 6 - Describe how aerobic respiration occurs in...Ch. 6 - Explain the fact that species as diverse as humans...Ch. 6 - Prob. 12WIOCh. 6 - Prob. 1PITCh. 6 - Prob. 2PITCh. 6 - Prob. 3PITCh. 6 - Where would fermentation, anaerobic respiration,...
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- In aerobic cellular respiration, which reactions occur only in the cytoplasm? Which ones occur only in a cells mitochondria?arrow_forwardWhat would be the effect on ATP production during chemiosmosis and oxidative phorphorylation, if the pH within the inner membrane space of the mitochondrion were decreased, assuming no effect of pH on the structure of proteins in the membrane? a) it would increase b) it would decrease c)it would stay the samearrow_forwardList down the specific functions of the component structures of mitochondrion relative to cellular respiration.arrow_forward
- The rate of oxygen consumption by mitochondria increases markedly when ADP is added and then returns to its initial value when the added ADP has been converted into ATP (Figure 18.39). Why does the rate decrease?arrow_forwardWhat distinguishes mitochondria from other organelles is their unique property. Why is it referred to as the "powerhouse" of the cell?arrow_forwardYou have been transported into the future, where a nanosensor can be inserted into a living cell and subsequently travel into any organelle. The sensor relays information stating that it has lodged itself in a compartment of the mitochondrion, where there is a concentration gradient of hydrogen ions (H+) and levels of ATP production are high. From what you know about cellular respiration in mitochondria, where is the sensor lodged? (a) inner mitochondrial membrane (b) mitochondrial matrix (c) chloroplast stroma (d) cell cytoplasm (e) plasma membranearrow_forward
- The following diagrams illustrate the two aqueous spaces and the inner membrane of a mitochondrion. In which diagram is the relative concentration of protons auch that ATP synthesis could occur if ATP synthase were present? (Gold spheres represent protons.) 圈圈圈圈圈 A B D E OA OB OC OD OE intermembrane space Anner membrane matriearrow_forwardThe figure below shows an illustration of a mitochondrian. Mustration of a mitochondrion Which of the following best describes the relationship between the structure and function of the mitochondrion? A B с D The shape of the mitochondrion Increases its material-exchange efficiency by maximiz ing its overall volume relative to its surface area. The double-membrane structure of the mitochondrion allows it to maintain its relatively acidic environment in which nutrients can be digested. The folds of the mitochondrion Inner membrane increase its material-exchange effi- ciency by maximizing its surface area relative to its volume. The specific structure of the mitochondrion Inner membrane allows it to correctly guide the folding of proteins into their functional shape.arrow_forwardThe main components of a mitochondrion are: Outer membrane O Thylakoid membrane O Cytosol O Inner membrane Grana O ATP Synthase for chemiosmosis Vacuole O Endoplasmic reticulum Stromaarrow_forward
- What will happen to the proton (H+ions) gradient in the mitochondria if the inner membrane is punctured?arrow_forwardSketch the double-membrane system of the mitochondrion and show where electron transfer chains and ATP synthases are located.arrow_forwardWhere does the process of cellular respiration occur? mitochondria endoplasmic reticulum nucleus chloroplastsarrow_forward
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