What helps the plasma membrane function? (1 point)
Responses
channels and chain-like structures
channels and chain-like structures
pumps and gelatin-like material
pumps and gelatin-like material
nuclei and endoplasmic reticula
nuclei and endoplasmic reticula
chloroplasts and mitochondria
chloroplasts and mitochondria
channels and chain-like structures
pumps and gelatin-like material
only 1 answer
pumps and gelatin-like material
Where are organelles like mitochondria and the Golgi apparatus found? (1 point)
Responses
nucleus
nucleus
cytoplasm
cytoplasm
chloroplasts
chloroplasts
plasma membrane
cytoplasm
Which statement correctly describes the function of pumps in the plasma membrane? (1 point)
Responses
Pumps store water in the plasma membrane for later use by the cell.
Pumps store water in the plasma membrane for later use by the cell.
Pumps glue the plasma membranes of adjacent cells together.
Pumps glue the plasma membranes of adjacent cells together.
Pumps hold the plasma membrane together.
Pumps hold the plasma membrane together.
Pumps move substances through the plasma membrane.
Pumps move substances through the plasma membrane.
Which part of the cell functions to recognize other cells? (1 point)
Responses
cell wall
cell wall
cytoplasm
cytoplasm
plasma membrane
plasma membrane
nucleus
plasma membrane
In order to determine what helps the plasma membrane function, we need to understand the structure and composition of the plasma membrane. The plasma membrane is a thin, flexible barrier that surrounds the cell and separates the interior of the cell from its external environment. It is primarily composed of a phospholipid bilayer with embedded proteins and other molecules.
The correct answer among the provided options is "channels and chain-like structures." Channels are proteins that span the lipid bilayer and allow the selective movement of ions and other molecules across the membrane. These channels facilitate the transport of nutrients and waste products in and out of the cell. Additionally, the presence of chain-like structures, such as the cytoskeleton, helps maintain the shape and stability of the plasma membrane.
Let's walk through the options to understand why the other choices are not correct:
- "Pumps and gelatin-like material" is not correct. While pumps, such as ion pumps, do play a role in transporting specific ions across the membrane, they are not the main contributors to the overall function of the plasma membrane. Additionally, there is no gelatin-like material involved in the function of the plasma membrane.
- "Nuclei and endoplasmic reticula" is also not correct. Nuclei are organelles involved in the control of genetic information, while endoplasmic reticula are involved in protein synthesis and modification. Although these organelles are important for the overall function of the cell, they do not directly contribute to the function of the plasma membrane.
- "Chloroplasts and mitochondria" are organelles involved in energy conversion in plant cells, but they are not directly related to the function of the plasma membrane. They have specific roles within the cell, but do not directly contribute to the plasma membrane's function.
Therefore, the correct answer is "channels and chain-like structures."