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Question:I'm in 7th grade, and i just learned today that in a bacterial cell, there is only a cell wall, cell membrane, and ribosomes.Well, if the nucleolus is the area where ribosomes are made, how are there ribosomes, if there's no place for it to be produced? Please help. I have a science test tomorrow!
Answers:Well the ribosomes in the eucaryotic cells are gathered in the nucleus and you can come to know if they are having any activity (i.e .replication) by their appearance, in that case of the procaryotic cells the ribosomes are in the cytoplasm and is said they don't have nucleus because it doesn't have a wall to cover it but you can say that there is one spot in the cell where the DNA is and around are the ribosomes, waiting to do their job the proteic synthesis.
Question:So I have to do a project for school about any plant or animal cell. So i am doing a red blood cell. But I just realized a red blood cell doesn't have a nucleus. Do animal cells have to have a nucleus? Is a red blood cell an animal cell?
Answers:Obviously not all animal cells have nuclei, since blood cells don't. If your project allows you to do any type of cell, and you want to to a red blood cell, go for it.
Question:would this just be a prokaryotic cell? we are learning about prokaryotiv and eukaryotic cells in biology, and I read somewhere that all bacteria's are prokaryotic.
However, what does this make eukaryotic?
would eukaryotic just be a normal, healthy cell? :S I'm confused by this concept.
Answers:Eukaryotic cells have a nucleus and a number of other membrane-bond organelles, such as the Golgi apparatus, the endoplasmic reticulum and mitochondria. Membrane-bound means that these organelles are enclosed in a membrane, and the inside of the organelle is separated from the rest of the cell. Plants, animals, fungi and many aglae are eukaryotes.
Prokaryotic cells lack a nucleus and other membrane-bound organelles. Prokaryote is really an old term, but it is still commonly used, even by biologists, because it can be useful for distinguishing between eukaryotic organisms and non-eukaryotic organisms. There are two large groups of prokaryotes: bacteria and archaea. So, all bacteria are prokaryotes, but not all prokaryotes are bacteria (just like all cats are animals, but not all animals are cats prokaryote is a very large group of organisms).
Prokaryotes and eukaryotes are both living organisms, and both can be healthy or sick. What defines them is the presence or absence of a nucleus and other organelles.
Question:This is for a10th grade science project plez help!!!
Answers:Bacteria do not have a nucleus, archae do not have a nucleus, and red-blood cells do not have a nucleus. With regards to the red-blood cells, there are quite a few types of terminally differentiated cells that do not have a nucleus.
Binary Fission In a Bacterial cell :Check us out at www.tutorvista.com The bacterial cell is surrounded by a lipid membrane, or cell membrane, which encloses the contents of the cell and acts as a barrier to hold nutrients, proteins and other essential components of the cytoplasm within the cell. As they are prokaryotes, bacteria do not tend to have membrane-bound organelles in their cytoplasm and thus contain few large intracellular structures. They consequently lack a nucleus, mitochondria, chloroplasts and the other organelles present in eukaryotic cells, such as the Golgi apparatus and endoplasmic reticulum.Bacteria were once seen as simple bags of cytoplasm, but elements such as prokaryotic cytoskeleton,and the localization of proteins to specific locations within the cytoplasm have been found to show levels of complexity. These subcellular compartments have been called "bacterial hyperstructures". Micro-compartments such as carboxysome provides a further level of organization, which are compartments within bacteria that are surrounded by polyhedral protein shells, rather than by lipid membranes.These "polyhedral organelles" localize and compartmentalize bacterial metabolism, a function performed by the membrane-bound organelles in eukaryotes. Many important biochemical reactions, such as energy generation, occur by concentration gradients across membranes, a potential difference also found in a battery. The general lack of internal membranes in bacteria means reactions such as electron transport occur ...