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Human Anatomy and Physiology

Cell Biology (cytology)

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.

Asked in The Difference Between, Cell Biology (cytology)

How do plant cells differ from animal cells?

The main difference is that plant cells have a cell wall as well as a cell membrane. Animal cells only have a cell membrane. More Details: Plant cells have cell walls, which support a rigid structure. These structures are composed of cellulose, hemicellulose, and a variety of other materials. An animal cell does not have this cell wall; With animal cells there is a diversity of shapes, though most are roughly spherical. Green Plant cells have chlorophyll, the light-absorbing pigment required for photosynthesis. This...
Asked in Microbiology, Cell Biology (cytology)

What is the function of the cytoplasm?

The cytoplasm is a semi fluid material surrounding organelles; site of many cellular reactions. The Cytoplasm offers support to the cell and speeds up inter-cellular travel. It allows the cell to take up 3-dimensional space and the cell's many organelles to "float" freely throughout. It also acts as a medium for transport inside the cell. Cytoplasm is the homogeneous, generally clear jelly-like material that fills cells. The cytoplasm consists of cytosol and the cellular organelles, except the nucleus. The cytosol is made up of...
Asked in Microbiology, Cell Biology (cytology)

Do animals cells have a cytoplasm?

All cells have a cytoplasm.It's in what all the organelles of a cell are present.A jelly-like viscous substance.Cytoplasm needs to be isotonic to it's surroundings for to function properly. ...
Asked in Microbiology, Biochemistry, Cell Biology (cytology)

What is the importance of the cytoplasm?

It is within the cytoplasm that most cellular activities occur, such as many metabolic pathways including Glycolysis, and processes such as cell division. cytoplasm is a part of the cell that holds the other organelles of the cell together. ...
Asked in History, Politics & Society, Cell Biology (cytology)

What is the outer covering of the vacuole?

Vacuoles, organelles that are present in all plant and fungal cells as well as those of other organisms (animal, bacterium, protist), are closed compartments containing molecules enclosed by water. This organelle therefore serves many functions. The primordial utricle and the tonoplast are examples of cytoplasm that is present around the vacuoles of plants. ...
Asked in Microbiology, Cell Biology (cytology)

Is the central vacuole an organelle?

Yes. The central vacuole like any other structure in the cytoplasm is an organelle. Other examples include the nucleus and mitochondria. ...
Asked in Cell Biology (cytology)

Water moves in and out of cells through?

Water molecules move by osmosis through the cell membrane which is a selectively permeable membrane. Since the middle of the lipid bilayer is hydrophobic, the movement of water is made possible by water channels or aquaporins in the membrane. ...
Asked in Biology, Biochemistry, Cell Biology (cytology)

What do glycolipids do?

Glycolipids may be involved in cells signalling that they're ''self''; to allow the immune system to recognise them. They could also be hormone receptors Glycolipids are a carbohydrate with lipids attached. Their main function is to provide energy and to serve as markers for cellular recognition. Glycolipids are found in cell membrane animals tissues and nerve cells, composed of lipids and carbohydrates such as glucose or galactose as in cerebrosides or combination with sialic acids in gangliosides. It provide energy as well as cell...
Asked in Cell Biology (cytology)

Why do skin cells have mitochondria?

Mitochondria is a cell organelle which provides the cell with energy in the form of ATP ( Adenosine triphosphate ) molecules by performing the function of respiration. It is known as the powerhouse of the cell. Hence, irrespective of any type of cell, mitochondria is present as the cell will not be able to perform basic functions without energy supply. ...
Asked in Cell Biology (cytology)

Why do cells give off waste?

Because most living organisms have the need to release waste products. The inability to excrete waste might cause toxic effects, inflammation and infection. Cells engulf and separate chemical compounds to obtain their energy. The energy of the elements that once consisted the said chemical compound are already released and absorbed by the cell. The elements, therefore, lost their usefulness and would be a burden (extra mass means extra energy needed) if the cells carried them around. Also, if the cells did not release...
Asked in Cell Biology (cytology)

What are the functions of the cytoskeleton?

The cytoskeleton provides shape and gives [mechanically] structural support. It also serves as a monorail to transport substances around the Cell; Structural: It provides structural support to Cells and stabilizes the Desmosomes [Cell-Gap junctions]; Movement: It assists with cytosol streaming and internal Cell motility; It helps move organelles and materials throughout the Cell; and It helps with the movement of chromosomes during Cell division; It is also responsible for providing the "structural Ladder" that the Enzyme Working Motors use for motility [this motility is used for...
Asked in Microbiology, Cell Biology (cytology), Cell or Plasma Membranes

Why is the cell membrane not permeable?

The cell membrane is permeable but not totally thereby said to be selectively or partially permeable. If this layer would not have been around our cells, we would all have died since exchange of materials(food, oxygen, excretory waste products) between the body and the environment would not have been possible. ...
Asked in Biology, Genetics, Cell Biology (cytology)

What molecule carries instructions for making proteins?

In the nucleus of the cell you have the DNA; the big archive with all the instructions for the cell including the one to make each protein. mRNA carries these instructions out of the cell nucleus to the ribosomes (the protein factories) where tRNA delivers the right amino acids to the ever growing chain to form the right protein as "written" on the mRNA. ...
Asked in Biology, Biochemistry, Cell Biology (cytology)

In what process are carrier proteins important?

Carrier proteins is important in facilitated diffusion. Facilitated diffusion transports molecules from one area of higher concentration on one side of the membrane to an area of lower concentration on the other side .Because the molecules are moving down their concentration gradient , facilitated diffusion is passive transport. ...
Asked in Science, Cell Biology (cytology)

What are the three factors affecting the transport of substances through the cell?

i) active transport, ii) passive transport, and iii) diffusion. Answer 2 Above given are processes of transport not factors . Factors include 1: concentration gradient 2 : Temperature , 3 :Surface area . ...
Asked in Biology, Biochemistry, Cell Biology (cytology)

How does alcohol affect the permeability of the cell membrane?

You have to be careful with this question, alcohol does not affect the permeability of the cell membrane. However alcohol increaces the rate of diffusion throught the cell membrane. Answer 2 Alcohol dissolves lipids from cell membrane thus it increases permeability as it can be seen in case of Gram staining . ...
Asked in Science, Cell Biology (cytology)

What an analogy for cell wall?

A good analogy for a cell wall is either a city wall which protects the city from attack and holds it together. or possibly a brick wall of a building. which supports the building, protects it from harsh elements and only allows materials to enter through certain entrances and exits. ...
Asked in Biology, Cell Biology (cytology)

What two organelles are not seen in a cheek cell?

A human cheek cell contains the same organelles as any other mammal cell and just about the organelles of any animal. It doesn't have several organelles, but the two physical characteristics present in a plant cell but absent in an animal cell are the chloroplast and central vacuole. The chloroplast carries out photosynthesis with its own set of DNA. The central vacuole contrasts with the many smaller vacuoles in an animal cell as the largest organelle in a plant cell. Vacuoles simply store...
Asked in Biology, Human Anatomy and Physiology, Cell Biology (cytology)

What is a cell with a large nucleus?

White blood cells possess a large nucleus as compared to other cells .
Asked in Biology, Genetics, Evolution, Cell Biology (cytology)

Where do you expect genetic differences between cells to arise from mitosis or from meiosis?

Genetic differences arise during meiosis due to crossing over , independent assortment/random segregation and genetic mutations, which result in variation. ...
Asked in Science, Cell Biology (cytology)

What are two types of monerans?

Bacteria and cyanobacteria are two types of Monera.
Asked in Microbiology, Cell Biology (cytology)

What is the purpose of the Golgi?

It packages things like proteins and other materials for transport and distribution either somewhere else inside the cell or sometimes out of the cell. ...
Asked in Microbiology, Cell Biology (cytology)

What is the central vacuoles function?

The central vacuoles primary function is to transport water and minerals throughout each and every cell inside of a green plant. ...