BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 4.7, Problem 2CC
Summary Introduction
To determine: The consequence of a chaperone protein not binding to a protein before being imported into the mitochondrial matrix.
Introduction: A eukaryotic cell consists of many cell organelles enclosed within a plasma membrane. Mitochondria and chloroplast are considered as semi-autonomous organelles because they possess the ability to grow and divide due to the presence of their own DNA. However, they are semi-autonomous as they depend on other parts of the cell, such as cytosol to import their internal components.
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Chapter 4 Solutions
BIOLOGY (LL)
Ch. 4.1 - What properties of deep-sea vents made them...Ch. 4.1 - Which protobiont seems most similar to todays...Ch. 4.1 - Core Skill: Connections Look back at Figure 3.11....Ch. 4.1 - Prob. 3CCCh. 4.2 - Prob. 1CCCh. 4.2 - Prob. 2CCCh. 4.3 - Prob. 1CSCh. 4.3 - Prob. 1CCCh. 4.3 - Prob. 2CSCh. 4.4 - Prob. 1CS
Ch. 4.4 - Describe the type of movements that occur between...Ch. 4.4 - Prob. 2CSCh. 4.5 - Prob. 1CCCh. 4.5 - Prob. 1CSCh. 4.5 - If we consider the Golgi apparatus as three...Ch. 4.5 - The Nucleus and Endomembrane System Experimental...Ch. 4.5 - Prob. 2EQCh. 4.5 - Prob. 3EQCh. 4.5 - Prob. 3CCCh. 4.6 - Prob. 1CCCh. 4.6 - Core Skill: Connections Look ahead to Figure...Ch. 4.7 - Prob. 1CCCh. 4.7 - Prob. 2CCCh. 4 - The cell theory states that a. all living things...Ch. 4 - Prob. 2TYCh. 4 - Prob. 3TYCh. 4 - Prob. 4TYCh. 4 - Each of the following is part of the endomembrane...Ch. 4 - Prob. 6TYCh. 4 - Functions of the smooth endoplasmic reticulum...Ch. 4 - Prob. 8TYCh. 4 - Prob. 9TYCh. 4 - Which of the following observations would not be...Ch. 4 - What are the four stages that led to the origin of...Ch. 4 - Explain how motor proteins and cytoskeletal...Ch. 4 - Prob. 3CQCh. 4 - Discuss the roles of the genome and proteome in...Ch. 4 - Prob. 2COQ
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- 1) Which of the following contains all of the information required to target a precursor protein from the cytosol to the mitochondrial matrix? a. N-terminal uptake-targeting sequence b. C-terminal uptake-targeting sequence c. post-translational organelle d. translocon e. None of the above 2) In the absence of targeting information, what is the default location of proteins synthesized on cytosolic ribosomes? a. Golgi apparatus b. ER lumun c. Cytosol d. Cell plasma membrane e. ER membranearrow_forwardFor each of the following statements regarding protein import into mitochondria, indicate whether it is likely to be true or false. [Select] into the mitochondria matrix. [Select] [Select] being translated [Select] unfolded state. The signal sequence is always retained after proteins are imported Chaperon proteins are needed for protein import into mitochondria ✓ Imported proteins cross the mitochondrial membrane while it is still Proteins imported into mitochondria cross the membrane inarrow_forwardWhich complex is the only complex from the respiratory pathway that has noproteins encoded by the mitochondrial chromosome?arrow_forward
- Mitochondrial matrix proteins can never be mis-targeted to the endoplasmic reticulum during synthesis because MRNAS encoding mitochondrial matrix proteins bind to a special class of cytoplasmic ribosomes that only synthesize mitochondrial proteins they are frequently targeted to the endoplasmic reticulum but are rapidly degraded they don't interact with signal recognition particle they are always synthesized inside the mitochondriaarrow_forwardDescribe the source or sources of energy needed for unidirectional translocation across the membrane in (a) cotranslational translocation into the endoplasmic reticulum (ER); (b) post-translational translocation into the ER; (c) translocation into the mitochondrial matrix.arrow_forwardWhat is the function of mitochondrial DNA?arrow_forward
- What did you learn about mitochondrial protein trafficking? Select all that apply. Protein enters nuclear pore as a folded protein. A signal sequence is required Protein enters nuclear pore as an unfolded protein. It is post-translationalarrow_forwardYou have a precursor protein that is translated in the cytosol with an N-terminal mitochondrial localization signal (MLS). a) Where will this protein go? b)You perform organelle isolation in cultured cells and compare this protein’s levels in the cytosol and the mitochondria. You perform a western blot which separates the proteins based on their size. Using the same antibody that recognizes this protein you notice that there is a difference in the protein’s size in the cytosol vs mitochondria. How will you explain this?arrow_forwardHow is the function of the thylakoid membrane similar to that of the inner mitochondrial membrane?arrow_forward
- Explain why the structure of the ER, mitochondria, and Golg apparatus assist their respective functions.arrow_forwardDoes the Tom complex take/require energy? What kind of proteins do the Tom complex bring into the mitochondria?arrow_forwardDetermine the reason due to which it is possible that the translation of a single mitochondrial protein might be affected specifically.arrow_forward
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