Mitochondria, Chloroplasts, and Peroxisomes Flashcards
Chapter 12
What are mitochondria?
Organelles that provide cells with ATP through the oxidative catabolism of preformed carbohydrates and lipids
Mitochondria are bounded by double-membrane system consisting of what ?
Inner and outer membranes
What are the folds of the membrane called and where do they extend to?
Cristae , extend into the matrix
What does the matrix contain?
Mitochondrial genome and enzymes responsible for reactions of the citric acid cycle and fatty acid oxidation
What is the site of oxidative phosphorylation?
The inner mitochondrial
What does the outer mitochondrial membrane consist of?
porins that allow passage of molecules less than 1 kDa
What parent do offspring inherit mitochondria ( mitochondrial DNA) from?
The mother
What results in outer membrane fusion?
protein interactions in
between separate mitochondria,
whereupon GTP hydrolysis results in a
conformational change that drives the outer
membranes together
What is the function of Drp1?
assembles into a ring structure around a mitochondrion
What does GTP hydrolysis do ?
drives contraction of the Drp1 ring which results in pinching and fission of the mitochondrion
What is the name of a red fluorescent dye ?
Mito Tracker Red
Name a blue fluorescent dye
DAPI
What is a major source of energy used to generate ATP in cells ?
Oxidative catabolism of carbohydrates ( glucose)
