How are proteins normally transported into the mitochondrial matrix, if they were originally synthesized on ribosomes present in the cytosol (not on the rough endoplasmic reticulum)? they are packaged into vesicles with v-SNARES for fusion with their target organelles they can pass freely through large pores in the inner mitochondrial membrane they are secreted by the golgi, captured by receptors, and absorbed by endosomes they must pass through the nuclear envelope by means of nuclear pores they are unfolded in the translocation channel, then refolded by chaperones

How are proteins normally transported into the mitochondrial matrix, if they were originally synthesized on ribosomes present in the cytosol (not on the rough endoplasmic reticulum)? they are packaged into vesicles with v-SNARES for fusion with their target organelles they can pass freely through large pores in the inner mitochondrial membrane they are secreted by the golgi, captured by receptors, and absorbed by endosomes they must pass through the nuclear envelope by means of nuclear pores they are unfolded in the translocation channel, then refolded by chaperones

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter5: Capturing And Releasing Energy

Section: Chapter Questions

Problem 2CT: How is the function of the thylakoid membrane similar to that of the inner mitochondrial membrane?

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Similar questions

An important function of the inner mitochondrial membrane is to provide a selectively permeable barrier to the movement of water soluble molecules and thus to generate different chemical environments on either side of the mem- brane. However, many of the substrates and products of oxidative phosphorylation are water soluble and must cross the inner membrane. How does this transport occur?
Energy-consuming active transport is used to move protons in all of the following directions except: A. from the mitochondrial matrix, across the mitochondrial cristae, into the intermembrane space B. from the extracellular fluid, across the plasma membrane, into the Halobacterium halobium cytosol C. from the cytosol of plant cells, across the vacuolar membrane, into the central vacuole D. from the cytosol of skeletal muscle cells, across the plasma membrane, into the extracellular fluid E. from the chloroplast stroma, across the thylakoid membrane, into the thylakoid space
How is the Inner Mitochondrial Membrane (IMM) different from the Outer Mitochondrial Membrane (OMM) ?
Only 37 of the proteins in mitochondria are encoded by the mitochondrial DNA. The other proteins are encoded in nuclear DNA, then translated and transported to the mitochondria. Describe one unique feature of protein transport across mitochondrial membranes.
Mitochondrial oxidation of fatty acids is a major source of ATP, yet fatty acids can be oxidized elsewhere. What organelle, besides the mitochondrion, can oxidize fatty acids? What is the fundamental difference between oxidation oc- curring in this organelle and mitochondrial oxidation?
Could the inner mitochondrial membrane carry out its functions in the coupling of electron transport and ATP synthesis if its lipid bilayer were readily permeable to hydrogen ions (protons)?
This UCP1 protein allows the protons (H+) of the mitochondrial intermembrane space to enter the mitochondrial matrix without going through the ATP synthase. This bypass represents a shortcut for protons and uncouples (i.e. eliminates the interrelationship between) the following two processes: The entry of protons inside the mitochondrial matrix, following their concentration gradient. The phosphorylation of ADP into ATP by the ATP synthase. It is this uncoupling that gave the protein its name: uncoupling protein 1 (UCP1). The following figure shows the location of UCP1 when it is expressed (synthesized) in the brown adipose tissues (BAT) of hibernating mammals. Question 12 Based on the UCP1 protein structure shown earlier, and based on the figure above, what type of protein is UCP1? Question 12 options: a) A primary active transporter. b) A motor protein.…
the shuttle mechanism which transports fatty acids into the mitochondrial matrix uses as the carrier molecule
In eukaryotic cells, the TCA/citric acid/Kreb's cycle happens in the _______ , while the electron transport chain is in the ________ . cytoplasm; lumen of the lysosome mitochondrial matrix; inner mitochondrial membrane inner mitochondrial membrane; cytoplasm nucleus; mitochondrial matrix
The glycerol phosphate shuttle moves reducing equivalents (electrons) from the cytosol to the mitochondrial matrix. Which of the following is not a feature of this shuttle? a) Cytoplasmic glycerol phosphate dehydrogenase converts dihydroxyacetone phosphate (DHAP) to glycerol-3-phosphate. b) Mitochondrial glycerol phosphate dehydrogenase converts glycerol-3-phosphate to DHAP. c) Cytoplasmic NADH is oxidized to NAD+. d) Mitochondrial NAD+ is reduced to NADH. e) 1.5 ATPs are formed per cytoplasmic NADH shuttled.
In the mitochondrial electron-transport chain, which complex accepts electrons from FADH2? Complex II. Complex I. Complex V. Complex IV. Complex III.
A principle of biology is that structure determines function.Explain how the invaginations of the inner mitochondrialmembrane are related to mitochondrial function.