Analyse the statements and pick up the right one regarding mitochondri...
Analysis of Mitochondrial Membranes
- Outer Mitochondrial Membrane: The outer mitochondrial membrane is quite porous because of the presence of many integral proteins known as porins. These proteins form channels that allow the free diffusion of molecules and ions up to a certain size, including small proteins.
- Inner Mitochondrial Membrane: The inner mitochondrial membrane is deeply folded, forming structures known as cristae. These folds increase the surface area of the membrane, thereby enhancing the ability of the mitochondria to produce ATP (adenosine triphosphate), which is the energy currency of the cell.
- Length of Membranes: The statement that the outer membrane is longer than the inner membrane is not correct. The length of the membranes is not a distinct feature of mitochondria. Instead, the inner membrane has more surface area due to its folds or cristae.
- Number of Membranes: Mitochondria are double-membraned organelles. They have an outer membrane and an inner membrane, separated by an intermembrane space. The statement that mitochondria mostly have a single membrane is incorrect.
So, based on the analysis, the correct statement regarding mitochondrial membranes is "The outer membrane is porous while the inner membrane is deeply folded".the inner membrane has more curls and turns compared to outer membrane , you can also take reference of brain(it has many curls and turns(neurons) and many experts say that our brains' neurons are much longer in length of our inner intestine(inner intestine measures 7 meters)).
This question is part of UPSC exam. View all Class 9 courses
Analyse the statements and pick up the right one regarding mitochondri...
Explanation:
Mitochondria are the powerhouse of the cell and are double-membrane-bound organelles. The two membranes of mitochondria are the outer membrane and the inner membrane. The inner membrane is folded into numerous cristae and encloses the matrix, which contains the enzymes and substrates required for the citric acid cycle. The outer membrane is relatively smooth and encloses the entire organelle.
The correct statement regarding mitochondrial membranes is option 'A', i.e., the inner membrane is longer than the outer membrane. This statement is true because of the following reasons:
• The inner membrane of mitochondria is highly folded, and these folds are called cristae. Cristae greatly increase the surface area of the inner membrane, allowing for more space to house the electron transport chain and ATP synthase enzymes.
• The outer membrane of mitochondria is relatively smooth and encloses the entire organelle. It is permeable to small molecules and ions due to the presence of porins, which form channels in the membrane.
• The length of the mitochondrial membranes can vary depending on the size of the organelle. However, in general, the inner membrane is longer than the outer membrane.
• The number of mitochondria in a cell can vary depending on the energy requirements of the cell. Some cells, such as muscle cells, have a high number of mitochondria to meet their metabolic demands.
In conclusion, the correct statement regarding mitochondrial membranes is option 'A', i.e., the inner membrane is longer than the outer membrane.
Analyse the statements and pick up the right one regarding mitochondri...
Answer is a because the inner membrane has more curls and turns compared to outer membrane , you can also take reference of brain(it has many curls and turns(neurons) and many experts say that our brains' neurons are much longer in length of our inner intestine(inner intestine measures 7 meters))
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.