Unanswered | Answered

Cell Biology (cytology)

Parent Category: Microbiology
Cells are the building blocks of all life. Humans are multicellular beings. The study of cells in called cytology. Ask questions here about the structure and function of cells.
Cytokines, chemokines, and general hormones are the cell messaging  mechanisms in higher organisms. Transcription factors and gene  expression products play big roles, too.
They both have mitchondria, phospholipid by-layer, use ribosomes, nucleus, endoplasmic reticulum.
Smooth ER aren't covered in ribosomes, but rough ER are. ER are like transport tubes that go through the cell.
Small agranulocytes that have a dense nucleus and very little cytoplasm are called Lymphocytes.
because of yo mama looser chupaley :o
The purpose of cytoplasm is to keep all organelles in place.
Basically,1 to 2 ATP molecules combine to make FADH while 2 to 3ATP molecules combine to make NADH.
Cytoplasm is very important for organisms because it is the one who  transfers certain materials all over the cell. Cytoplasm is also  known for being the one who diffuses harmful wastes in a cell.
The location where proteins are exported from the cell is where vesicles containing them fuse at the cell membrane.
A cell membrane is found on both plant and animal cells it selectively chooses what substances may enter or leave the cell. Hence the term selectively permeable. For a more advanced explanation I recommend you research protein icebergs and the different types of transport a membrane can take part in...
Let's look at human cells. If you didn't have cells you wouldn't exist. Your entire body, skeleton, muscles, organs, etc are comprised of cells. Inside those cells are thousands of water molecules (hence the reason your body is 70% water). The cells make it possible for everything in the human body...
Yes. Your question should read 'Are mitochondria only found in  .........'!
Reproduction is not essential for the survival of a single organism  for a relatively brief period of time! A bad question as it is open  to misinterpretation!
No. No prokaryote has any sort of endoplasmic reticulum.
proteins, lipids, carbohydrates   specific   Glycoproteins, Glycolipids, cholestrol and mostly phospholipids
Cholesterol. It maintains the structure integrity of the membranes
The cytoskeleton provides shape and gives [mechanically] structuralsupport. It also serves as a monorail to transport substancesaround the Cell; Structural: It provides structural support to Cells and stabilizesthe Desmosomes [Cell-Gap junctions]; Movement: It assists with cytosol streaming and...
Gram stain binds to peptidoglycan, so bacteria with double  membranes with thin peptidoglycan layers are more likely not to  bind to it, so are usually gram negative, while single membraned  bacteria with thick peptidoglycan layers are more likely to be gram  positive.
No, they break contents of the cell down.
The Golgi apparatus, first described by Camillo Golgi, consists of  a system of membrane-bound vesicles arranged approximately parallel  to each other in stacks called cisterns. The material synthesized  near the ER is packaged and dispatched to various targets inside  and outside the cell...
Mitochondria actually does produce carbon dioxode. In the process  of cellular respiration 2 carbon dioxide molecules are made from  every citrate molecule that starts the Krebs cycle.
nothing the cell does exactly the same thing the only thing that is different is that the cells divide in more pieces depending on the size.formation of a cell plate
Cellular respiration occurs in the mitochondria. The equation for  cellular respiration is C6H12O6 + 6O2 ---> 6CO2 + 6H2O
Part of the DNA molecule (gene) is transcribed into an RNA molecule  that exits through the pores in Penis   the nucleus. Once the RNA reaches the ribosome in the cytoplasm it  translates into a protein.
If cells don't reproduce correctly then most likely the cell diesand dissolves into the system and is replaced by another fromdivision in a different placeto refill the void .
I'm not sure what you mean by 'lost its 3D' but I think you might  mean when a protein is broken down or heated it becomes denatured.
They are selectively permeable, provides structure to cells.
No, they are eukaryotes. -love: Gina Schriefer<3
Google vacuole for many pictures. The vacuole is simply a membranous organelle that holds water, organic, and inorganic molecules for various reasons determined by the cell. Usually circular, and colored some shade of blue in diagrams, can be practically any size.
== Answer ==   Catholics are COMPLETELY against stem cell research.   Another Answer   Catholics are completely against embryonic stem cell research, which is completely immoral because it involves harvesting and destroying human embryos - infants.   Catholics support adult stem cell...
yes.Paramecium is a eukariyotes.All eukariyuotes have mitochondria
The cell membrane is a lipid bilayer. It is mainly composed of lipids, proteins, and carbohydrates.
Both animal cells and plant cells have ER in them.
well there are three instead but you could use two out of those three 1.diffusion2. DNA3. surface area to volume ratioHope this help...
Organelles are the specific units inside the cell (like the cell wall). The structure depends on what specific unit you're talking about. For example: the cell wall is composed of phospholipids.
Yes mitochondria are organelles in the cytoplasm of cells. Their function is to make the energy for a cell.  actually, the mithochondrion (plural mitochondia) is an organelle in both, plant and animal cell, its job is to oxidise biological fuels, such as, liquids, protiens, and fats. so basically...
cytoplasmic organelles both of them have their own DNA
Ribosomes are synthesized in the nucleolus, which is a  non-membrane-bound organelle containing much of the cell's RNA.   The endoplasmic reticulum (more specifically the "rough" ER) in  eukaryotic cells contains temporarily membrane-bound ribosomes,  where RNA goes to be translated.
yes mitochondria is double membrane bound stucture in eukaryotes cell only not in prokaryote becase they are absent in prokaryotes
Fats are known as lipids in biology. Cell membranes consists of a phospholipid bilayer, which are 2 layers of phospholipids. A phospholipid is a phosphate group attached to a glycerol, which is attached to 2 fatty acid tails. At the biochemical level, fat is simply a long chain of carbons with...
They enter/exit through a passive transport process called diffusion. It is caused by a concentration gradient within the two things being exchanged. The molecules diffuse across the membrane from the high concentration to the lower concentration side.
I would always think of the endoplasmic reticulum like FedEx, shipping things out to the Golgi body (Golgi Complex)
nucleolus, nucleoplasm and nuclear pores
Prokaryotic organisms lack membrane bound nuclei, and also.. Lack arms.
1.While eucaryotes have 80 ribosomes(except at mitrochondria and chloroplasts),procaryotes have 70 ribosomes. 2.Procaryotic cells are mainly unicellular in nature (e.g bacteria,archae),while eucaryotic cells are predominately multicellular(e.g plants,animals).
Yes fungus cells are eucaryotic so are algae and protozoa they all belong to the Domain Eucarya.
AN organelle that transports protein through the cellType your answer here...
Interaction between a cell and another cell. It's done usually by lipoproteins embedded in the plasma membrane. It really depends on the type of cell and the situation though.
The endoplasmic reticulum that is why its nickname is the road.
Instructions from DNA are carried to ribosomes by molecules of  amino acids. These are carried by tRNA while mRNA carries  information from the genes to ribosomes.
Stem cells are not an invention, they are the product of biological evolution.
The main organelle that eukaryotes(eukaryotic cells) possess is the NUCLEUS
lysosomes are organelles about the size of small vacoules. they are also called suicide bags. lysosomes burst releasing harmful emzymes when the cell is subjected to any harmful substance. these enzymes digest the substance that the cell identifies as alien thus protecting the cell.
the cell membrane (partially permeable) has tiny pores which allow  certain substances in and out of the cell
through the cell membrane, active transportation
rough er   There are few other organelles too.They are cytoplasm , chloroplasts and mitochondria
cellular diffusion, active and passive transport
All the cells have membrane. A cell membrane is a structure that serves as a boundary to the cell. It conducts ions, and solutes across the membrane by active transport.
Golgi bodies are found in cells. One can not really say how much itis because cells are constantly rejuvenated and dying. It hasimportant role in secretion. Golgi bodies are found in cells. One can not really say how much itis because cells are constantly rejuvenated and dying. It hasimportant role...
69 I really dont know cuz i just farted and im drunk
SSome scientists call protein a small peptides, that is, molecules  with less than 25 amino acids. However, a typical small and very  important protein is the insulin. This protein is crucial for the  metabolism to regulate glucose in blood stream. Insulin is formed  by two amino acid chains...
the large intestine i believe so... am i right?
prokaryotes do not have nucleus and their genetic material or DNA are held up as nucleosome in a bacterial cell.
Because it is studded with ribosomes that cause it to be rough.
It is the gel-like fluid that is inside the cell membrane and it holds all the organelles.
The plasma membrane is also known as the cell surface membrane because it occurs at the surface of the cell ie it encloses the cytoplasm and separates it from the surroundings of the cell.In a plant cell the plasma membrane is between the cytoplasm and the cell wall, and is usually pressed up...
It controls what enters and leaves a cell, it also gives it support and shape.
Mitochondria contain 70s ribosomes inside them.Mitochondria are much larger
The mitochrodion burns glucose, which gives off energy to the cell.
Siegal, Andrew. "Neutrality and consensus:Towarda a Viable Policy on Human Stem Cell Research". Molecular Aspects of Medicine 22.3 (2001):171-181
It gives a structure and protects the inner cells from the external environment.
All eukaryotic organisms have mitochondria. This includes animals plants and fungi.
How to eukaryotes make protein