Eukaryotic cells (from the Greek meaning truly nuclear) comprise all of the life kingdoms except monera. They can be easily distinguished through a membrane-bound nucleus. Diagram of an animal cell. Eukaryotic cells also contain many internal membrane-bound structures called organelles. These organelles such as the mitochondrion or chloroplast serve to perform metabolic functions and energy conversion. Other organelles like intracellular filaments provide structural support and cellular motility. The function of individual organelles is described in detail in the Cell Anatomy Section. Diagram of a plant cell. Another important member of the eukaryote family is the plant cell. They function essentially in the same manner as other eukaryotic cells, but there are three unique structures which set them apart. Plastids, cell walls, and vacuoles are present only in plant cells.
Structure
Description & Function
Found in Animals?
Found in Plants?
Plasma Membrane
Membrane boundary of cell; regulates cell transport
X
X
Nucleus
Large structure surrounded by double membrane; species cellular proteins
X
X
Nucleolus
Granular body within nucleus; site of r-RNA synthesis
X
X
Endoplasmic reticulum
Network of internal membranes; site of membrane lipid & protein synthesis
X
X
Golgi Complex
Stacks of flattened membrane sacs; modifies, packages & secretes proteins
X
X
Lysosomes
Membranous sacs; contains enzymes to digest materials
X
X
Vacuoles
Membranous sacs; transport and store water & other materials
X
X
Mitochondria
Sacs containing 2 membranes; site of Krebs cycle, electron transport system, chemiosmosis.
X
X
Plastids
Sac-like structures with internal thylakoid membranes; photosynthesis
X
Microbodies
Membranous sacs containing enzymes, diverse reactions
X
X
II. Particulate Structures
Structure
Description & Function
Found in Animals?
Found in Plants?
Chromosomes
Composed of DNA-protein complex; contains genes
X
X
Ribosomes
Granular organelles composed of RNA & protein; synthesize proteins
X
X
Microtubules
Hollow tubes of tubulin; structural support for organelles of movement
X
X
Microfilaments
Solid, rodlike structures of actin, structural support
X
X
Centrioles
Small hollow cylinders; involved in cell division & anchors flagellae & cilia
X
Cilia
Short hair-like structures; movement, food intake, usually >>1 on a cell.
X
X
Flagella
Long projections; cellular locomotion, usually 1-5 on a cell.
X
X
III. Extracellular structures
Structure
Description & Function
Found in Animals?
Found in Plants?
Cell wall
Multiple-layers of cellulose; structural support
X
-Nucleus directs the cells activities
-Cell respiration takes place in mitochondria
-Ribosomes manufacture proteins and take place in replication, transcription, and translation.
The three main components of a eukaryotic cell are the cell walls, vacuoles, and the plastids.
It depends according to cell. They have several functions.
Eukaryotic cells are larger than prokaryotic cells.
Prokaryotic cells have no nuclei and eukaryotic cells have a true nuclei. prokaryotic DNA is circular where eukaryotic DNA is linear.
prokaryotic and eukaryotic
Both eukaryotic cells and prokaryotic cells have a plasma membrane.
Eukaryotic DNA sequences called enhancers have a function similar to the operators of prokaryotic operons. In eukaryotic cells, repressor proteins inhibit transcription by binding to silencers.
are taste bud cells prokaryotic or eukaryotic
Eukaryotic cells are larger than prokaryotic cells.
There are quite a few differences between eukaryotic and prokaryotic cells. Prokaryotic cells do not have a nucleus, while eukaryotic cells do. Prokaryotic cells are not found in humans while eukaryotic cells are. Prokaryotic cells are primitive while eukaryotic cells are much more evolved.
Prokaryotic and eukaryotic cells are similar in which of the following ways?
Prokaryotic cells have no nuclei and eukaryotic cells have a true nuclei. prokaryotic DNA is circular where eukaryotic DNA is linear.
prokaryotic and eukaryotic
No, but eukaryotic cells contain a descendant of a prokaryotic organism.
Both prokaryotic and eukaryotic cells divide; eukaryotic cells through mitosis, prokaryotic cells through binary fission.
viruses, prokaryotic cells, eukaryotic cells
Both eukaryotic cells and prokaryotic cells have a plasma membrane.
The main primary difference between prokaryotic and eukaryotic cells is that the prokaryotic cells don't contain a nucleus. The eukaryotic cells are also larger than the prokaryotic cells.
The cells found in the human body are eukaryotic cells. Organisms that have eukaryotic cells are usually multicellular like humans. Organisms that have prokaryotic cells are usually unicelluar, like bacteria.