Overview Of Cell Flashcards
(22 cards)
What is the outer boundary of a typical plant cell?
The outer boundary of a typical plant cell is a distinct cell wall.
What is the outer structure of human cheek cells?
The outer structure of human cheek cells is a cell membrane.
What is the dense membrane-bound structure inside each cell?
The dense membrane-bound structure inside each cell is called the nucleus.
What does the nucleus contain?
The nucleus contains chromosomes, which in turn contain genetic material, DNA.
What are eukaryotic cells?
Eukaryotic cells are cells that have membrane-bound nuclei.
What are prokaryotic cells?
Prokaryotic cells are cells that lack a membrane-bound nucleus.
What occupies the volume of both prokaryotic and eukaryotic cells?
A semi-fluid matrix called cytoplasm occupies the volume of both cell types.
What is the main function of cytoplasm?
Cytoplasm is the main arena of cellular activities in both plant and animal cells.
What are organelles?
Organelles are membrane-bound distinct structures found in eukaryotic cells.
Name some organelles found in eukaryotic cells.
Some organelles found in eukaryotic cells include the endoplasmic reticulum (ER), golgi complex, lysosomes, mitochondria, microbodies, and vacuoles.
Do prokaryotic cells have membrane-bound organelles?
No, prokaryotic cells lack membrane-bound organelles.
What type of organelles are ribosomes?
Ribosomes are non-membrane bound organelles found in all cells.
Where are ribosomes found within the cell?
Ribosomes are found in the cytoplasm, within chloroplasts (in plants), mitochondria, and on rough ER.
What is the function of centrosome in animal cells?
Centrosome helps in cell division in animal cells.
What is the size of Mycoplasmas?
Mycoplasmas, the smallest cells, are only 0.3 µm in length.
What is the size range of bacteria?
Bacteria can be 3 to 5 µm in length.
What is the largest isolated single cell?
The largest isolated single cell is the egg of an ostrich.
What is the diameter of human red blood cells?
Human red blood cells are about 7.0 µm in diameter.
What are some of the longest cells in the body?
Nerve cells are some of the longest cells.
How do cells vary in shape?
Cells may be disc-like, polygonal, columnar, cuboid, thread-like, or irregular.
What influences the shape of a cell?
The shape of the cell may vary with the function they perform.
