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Which statement best describes the use of a catalyst in a fuel cell?
A catalyst in a fuel cell speeds up the chemical reactions that convert fuel and oxygen into electricity, without being consumed in the process. It lowers the activation energy required for the reactions to occur, increasing the efficiency of the fuel cell.
What is necessary for a convection cell to be set up as a liquid?
For a convection cell to be set up in a liquid, the liquid must be heated unevenly, creating temperature variations. As the liquid near the heat source becomes warmer and less dense, it will rise, while the cooler, denser liquid will sink. This movement of fluid leads to a continuous circulation within the liquid, forming a convection cell.
What major fuel is used in cell activities?
Glucose is the major fuel used in cell activities. Cells break down glucose through a process called cellular respiration to produce energy in the form of ATP.
What term describes the difference in the concentrations of a substance across a cell's membrane?
The term that describes the difference in concentrations of a substance across a cell's membrane is called the concentration gradient. This gradient drives the movement of substances such as ions or molecules across the membrane through processes like diffusion or active transport to achieve equilibrium.
The statement below refers to a structure of the sale oxygen diffuses to destruction by a sodium ion me need to active transport what structure in the statement most likely referred to?
The structure most likely referred to in the statement is the cell membrane. Active transport mechanisms in cells, like the sodium-potassium pump, are responsible for transporting ions such as sodium against their concentration gradient to maintain proper cellular function. Oxygen diffusing into the cell would typically occur through passive transport mechanisms like simple diffusion across the cell membrane.
What statement best describes extracellular digestion?
large insoluble molecules are converted to small soluble molecules outside the cell
What statement best describes the role of the cell membrane?
The cell membrane controls what goes in an out of the cell.
What statement best describes a change that would most likely be observed in the cells formed as s result of mitotic cell division?
One cell becomes two cells that have identical copies of DNA.
What describes the major role of lipids within a cell?
They are the main structural components of membranes
What are a cell's three major subdivisions?
A cell has three major subdivisions: the plasma membrane that surrounds the cell, the cytoplasm which is the gel-like substance inside the cell, and the nucleus that contains the genetic material of the cell.
What fluid mosaic model describes the?
Cell Membrane
What is the liquid portion of a cell?
The liquid part of the cell that contains all the organelles is called the cytoplasm.
What describes mitochondria?
it is the powerhouse of a cell
What best describes the brain?
Cell
What is a repeating series of events that describes the life of a cell?
Cell Cycle
Difference between dry cell and wet cell?
a dry cell is a cell that has electrolyte that is a paste a wet cell is a cell that has a liquid electrolyte -sads
What is the connection of protoplast with cell?
liquid content of the cell
