0
What else can I help you with?
Which layer controls selective permeability?
The cell membrane controls selective permeability. Larger substances can enter the cell through endocytosis and exit through exocytosis.
How do transport proteins work?
They are used in Facilitated Diffusion, helping to transport ions, macromolecules, and other substances incapable of entering a cell by themselves to cross through the plasma membrane of the cell.
Bacterial cells are usually much larger than eukaryotic cells?
There are 2 basic cell types: prokaryotic and eukaryotic. Prokaryotic cells arebacteria.Eukaryotic cells generally are larger and more complex than prokaryotic cells.
Why is the cell membrane called semi-permeable?
The cell membrane is hydrophilic outside and hydrophobic from inside thanks to the phospholipid. The membrane also contains protein gated channels which allow some molecules to pass through and ion channels. The transport in an out of cells is also controlled by osmotic pressure, the electric charge etc.
Trait that improves a species chance of survival?
Adaptation is a trait or structure that improves an organism's chance for survival and reproduction. Benthos is organisms that live on or near the ocean bottom, sometimes attached to surfaces.
What does eukaryote have that prokayote does not?
Eukaryotes have membrane-bound organelles such as a nucleus, mitochondria, and endoplasmic reticulum, which prokaryotes lack. Additionally, eukaryotic cells have linear chromosomes enclosed in the nucleus, while prokaryotic cells have circular DNA floating freely in the cytoplasm. Eukaryotes are generally larger and more complex in structure compared to prokaryotes.
What is the difference between eukaryotes and prokaryotes?
Prokaryotes do not have a nucleusA eukaryote has a 'true' (membrane enclosed) nucleus and extensive system of membrane enclosed organelles, such as; mitochondria, endoplasmic reticulum, Golgi apparatus ect. and the ribosomes are found both free in the cytoplasm and attached to the rough ER. Prokaryotes have no membrane enclosed organelles or nucleus and the chromatin material is free is the cytoplasm, often in a "nuclear area", the Ribosomes in prokaryotes are all free in the cytoplasm.
What is the purpose of ribosomes and what do they look like?
Ribosomes are involved in protein synthesis inside the cell, they are very small And are located either freely innthe cytoplasm or atached to the Rough endoplasmatic reticulum. They are roundish in shape.
What organelles will be easily seen when you examine your cheek cells?
The larger organelles, such as nucleus, mitochondria, and cellular membrane.
What part do all cells contain?
All cells have a plasma (cell) membrane, cytoplasm, and hereditary material. The plasma membrane controls what enters and leaves the cell. Cytoplasm is where most of the life processes occurs. The activities of the cell are controlled by the hereditary material. In small, simple cells called prokaryotes, this coded hereditary material floats free inside the cytoplasm. In larger, more complex cells called eukaryotes, the coded DNA is contained in a membrane bound structure called the nucleus. Eukaryotic cells have other cell part (organelles) that prokaryotes don't. So both prokayotes and eukaryotes have the three cell parts described above.
Compare the structure of a eukaryotic cell with that of a prokaryotic cell?
Eukaryotic cells have a defined nucleus that houses their DNA, along with membrane-bound organelles like mitochondria and endoplasmic reticulum. Prokaryotic cells lack a nucleus and membrane-bound organelles, with their genetic material floating freely in the cytoplasm. Eukaryotic cells are typically larger and more complex than prokaryotic cells.
What is a free-floating organism that serve as food for larger animals?
plankton
Why aren't there cells 1 foot in diameter or larger?
The reason there is a limit on the size of a single living cell is the mass to surface area ratio. The membrane is where oxygen is exchanged and molecules diffuse and are transported. A membrane will increase linearly with the diameter but the internal volume will increase to the cube of the diameter so at some point there is not enough membrane to service the large amount of living 'stuff' in the cytoplasm.
How does the size of the vacuole different in plant and animal cell?
It is much larger in a plant cell because a cell needs more water in-order to perform photosynthesis. Also plants have one big vacuole, whereas animals have a number of smaller vacuoles floating around in the cytoplasm.
What are free floating nucleotides?
Free floating nucleotides are individual units of nucleic acids, such as DNA or RNA, that are not part of a larger nucleic acid chain. These nucleotides can serve as building blocks for synthesizing new DNA or RNA strands. They are also important for various cellular processes, such as protein synthesis and energy storage.
What is the thin structure surrounding an animal cell?
The thin structure that surrounds the cytoplasm of a cheek cell is called as cell membrane. This is present in most plant, animal and fungi cells. It is a selectively permeable structure and allows the flow of ions and particles from the inside of the cell to the outside and vice-versa.
What surrounds a plant cell and protects it?
The thin structure that surrounds the cytoplasm of a cell is called as cell membrane. This is present in most plant, animal and fungi cells. It is a selectively permeable structure and allows the flow of ions and particles from the inside of the cell to the outside and vice-versa. However plant cells, in addition to the cell membrane also have the cell wall outside the cell membrane. This provides mechanical rigidity to the cell and prevents the flow of larger particles.
