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What is a double membrane system?
Mitochondria are surrounded by a double-membrane system, consisting of inner and outer mitochondrial membranes separated by an intermembrane space (Figure 10.1). The inner membrane forms numerous folds (cristae), which extend into the interior (or matrix) of the organelle.
What is the function of the double membrane in mitochondria?
This membrane surrounds the mitochondrial matrix, where the citric acid cycle produces the electrons that travel from one protein complex to the next in the inner membrane. At the end of this electron transport chain, the final electron acceptor is oxygen, and this ultimately forms water (H20).
Which organism has double membrane?
Besides the nucleus, two other organelles — the mitochondrion and the chloroplast — play an especially important role in eukaryotic cells. These specialized structures are enclosed by double membranes, and they are believed to have originated back when all living things on Earth were single-celled organisms.
What is the function of the double membrane in the chloroplast?
A chloroplast is a type of plastid (a saclike organelle with a double membrane) that contains chlorophyll to absorb light energy.
Which of the following is a double membrane structure?
Generally, eukaryotic cells have double-membrane-bounded organelles , including the nucleus, mitochondria, and chloroplasts. A eukaryotic nucleus consists of the nucleoplasm, nuclear envelope (NE), nuclear lamina, and nucleolus (Matsuanga et al.
What are the types of reactions mediated by enzymes?
Within biological systems there are six major classes of biochemical reactions that are mediated by enzymes. These include group transfer reactions, the formation/removal of carbon-carbon double bonds, isomerization reactions, ligation reactions, hydrolysis reactions, and oxidation-reduction reactions.
What is the function of the B cell membrane?
B Cell membrane a thin covering that separates the cell from the outside environment cells basic building blocks of life cell wall a rigid covering of a plant cell made of cellulose chloroplast a green pigment that traps the energy in sunlight chlorophyll
How are chemical reactions organized into metabolic pathways?
The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed through a series of steps into another chemical, each step being facilitated by a specific enzyme. Enzymes are crucial to metabolism because enzymes act as catalysts – they allow a reaction to proceed more rapidly.
What is the function of the cristae in the cell membrane?
It has many folds that form a layered structure called cristae and this helps in increasing the surface area inside the organelle. The cristae and the proteins of the inner membrane aids in the production of ATP molecules. The inner membrane is strictly permeable only to oxygen and to ATP molecules.