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molec bio 2
exam 3
50
Biology
Undergraduate 2
11/12/2008

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Cards

Term
What process is depicted in the figure? (Insertion, Transloaction into Matrix, etc)
Definition
Post-translational membrane transport
Term
What forms of energy are required to import the protein into the matrix?
Definition
H+ gradient and ATP
Term
What is protein A?
Definition
TOM
Term
What is protein B?
Definition
TIM 23
Term
What other organelles import protein via this mechanism?
Definition
Lysosome
Term
Where does beta-oxidation occur?
Definition
Peroxisome
Term
What protein hydrolyzes GTP during gated transport?
Definition
Ran
Term
What is the default route for endocytosis?
Definition
Plasma membrane to endosome to lysosome
Term
What is the default route for exocytosis?
Definition
ER to golgi to plasma membrane
Term
What type of vesicle transports proteins from the Golgi apparatus back to the ER?
Definition
COP I
Term
What process is depicted in the figure? (Lipid-linked oligosaccharide, growing polypeptide chain, etc)
Definition
N-linked glycosylation
Term
What enzyme carries out the process depicted?
Definition
Oligosaccharyl transferase
Term
Is the oligosaccharide pictured always the final carbohydrate present on the protein at its site of function?
Definition
False
Term
Where does this process occur?
Definition
Rough ER
Term
During translation initiation, the MET-tRNA binding directly yo what feature of the mRNA?
Definition
5' cap
Term
What type of endocytosis is involved in the downregulation of cell surface receptors?
Definition
Caveolae
Term
Where is the LDL receptor split from the LSL particle and recycled back to the plasma membrane?
Definition
Endosome
Term
Where does N-linked glycosylation occur?
Definition
Rough ER
Term
What molecule "donates" the carbohydrate during N-linked glycosylation?
Definition
Dolichol
Term
What amino acids "accept" carbohydrates during O-linked glycosylation?
Definition
Serine and Threonine
Term
Which of the following is NOT directly produced by the Kerb's cycle?
Definition
ATP
Term
Which of the following would most likely be modified by the addition of mannose-6-phosphate?
Definition
Acid hydrolase
Term
Where does glycolysis occur?
Definition
Cytosol
Term
What is the final electron acceptor in the respiratory electron transport chain?
Definition
Oxygen
Term
What type of energy is produced as a result of this process? (Intermembrane space, inner mitochondrial membrane, matrix, donor, acceptor).
Definition
Proton gradient
Term
What is protein complex A?
Definition
Cytochrome oxidase
Term
What is molecule B?
Definition
Ubiquinone
Term
What molecules act as the final electron acceptor?
Definition
Oxygen
Term
What molecules act as the electron donor?
Definition
NADH and FADH2
Term
What process is this electron chain a part of?
Definition
Aerobic respiration
Term
Which of the following is required for vesicle fusion?
Definition
Rab
Term
Animal cells contrain glyoxysomes?
Definition
False
Term
Where does phosphorylation of mannose to form mannose-6-phosphate occur?
Definition
Cis Golgi Network
Term
What is the final product of glycolysis?
Definition
Pyruvate
Term
Where does acetyl-CoA formation occur?
Definition
Mitochondrial matrix
Term
Where is cytochrome P450 located in a cell?
Definition
Smooth ER
Term
Where does the charging of tRNA's occur?
Definition
Cytosol
Term
Where do new aminoacyl-tRNAs enter the ribosome during translation elongation?
Definition
A-site
Term
Where does vesicle traffic occur within the ER?
Definition
Transitional ER
Term
The coupling of an H+ gradient to ATP production is referred to as chemiomosis.
Definition
True
Term
What site imports proteins via co-translational transmembrane transport?
Definition
Rough ER
Term
Which of the following processes provide two-way transport?
Definition
Vesicle transport and gated transport
Term
What molecule pinches-off vesicles from a donor membrane?
Definition
Dynamin
Term
Vesicles contain an intact protein coat during docking with the target membrane.
Definition
False
Term
What is a simple sequence of amino acids on the end of a protein that acts as a sorting signal?
Definition
Signal peptide
Term
Protein import receptors can be both soluable and membrane-bound.
Definition
True
Term
Most energy is "lost" from a cell in what form?
Definition
Heat
Term
What process brings large molecules such as bacteria into a cell?
Definition
Phagocytosis
Term
All autotrophic organisms convert light energy into chemical bond energy (carbohydrates).
Definition
False
Term
All heterotrophic organisms use aerobic respiration as the major energy producing process.
Definition
False
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