Biology, asked by sohan61, 1 year ago

what is the definition of nucleoid,cell wall,cell membrane,prokaryotic cell,eukaryotic cell,cytoplasm,nucleus,plastid,vacuole,mitochondria,lysosomes and ATP

Answers

Answered by Pprraannaavv
2

Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes.
The nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes.
Mitochondria are responsible for ATP production; the endoplasmic reticulum modifies proteins and synthesizes lipids; and the golgi apparatus is where the sorting of lipids and proteins takes place.
Peroxisomes carry out oxidation reactions that break down fatty acids and amino acids and detoxify poisons; vesicles and vacuoles function in storage and transport.
Animal cells have a centrosome and lysosomes while plant cells do not.
Plant cells have a cell wall, a large central vacuole, chloroplasts, and other specialized plastids, whereas animal cells do not.
Key Terms
eukaryotic: Having complex cells in which the genetic material is organized into membrane-bound nuclei.
organelle: A specialized structure found inside cells that carries out a specific life process (e.g. ribosomes, vacuoles).
photosynthesis: the process by which plants and other photoautotrophs generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts
Eukaryotic Cell Structure
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes. However, unlike prokaryotic cells, eukaryotic cells have:

a membrane-bound nucleus
numerous membrane-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)
several rod-shaped chromosomes
Because a eukaryotic cell’s nucleus is surrounded by a membrane, it is often said to have a “true nucleus. ” Organelles (meaning “little organ”) have specialized cellular roles, just as the organs of your body have specialized roles. They allow different functions to be compartmentalized in different areas of the cell.

The Nucleus & Its Structures
Typically, the nucleus is the most prominent organelle in a cell. Eukaryotic cells have a true nucleus, which means the cell’s DNA is surrounded by a membrane. Therefore, the nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes, the cellular organelles responsible for protein synthesis. The nuclear envelope is a double-membrane structure that constitutes the outermost portion of the nucleus. Both the inner and outer membranes of the nuclear envelope are phospholipid bilayers. The nuclear envelope is punctuated with pores that control the passage of ions, molecules, and RNA between the nucleoplasm and cytoplasm. The nucleoplasm is the semi-solid fluid inside the nucleus where we find the chromatin and the nucleolus. Furthermore, chromosomes are structures within the nucleus that are made up of DNA, the genetic material. In prokaryotes, DNA is organized into a single circular chromosome. In eukaryotes, chromosomes are linear structures
Answered by ilikeme
0
nucleoid - The nucleoid (meaning nucleus-like) is an irregularly shaped region within the cell of a prokaryote that contains all or most of the genetic material, called genophore
cell wall -  
cell wall is an outer layer surrounding certain cells that is outside of the cell membrane. All cellshave cell membranes, but generally only plants, fungi, algae, most bacteria, and archaea have cellswith cell walls.
cell membrane - 
the semipermeable membrane surrounding the cytoplasm of a cell. It consists of a lipid bilayer with embedded proteins.
prokaryotic cell - 
Prokaryotic cells are cells that do not have a true nucleus or most other cell organelles
eukaryotic cell - 
Eukaryotic cells are cells that contain a nucleus and organelles, and are enclosed by a plasma membrane.
cytoplasm - 
 In cells, the cytoplasm consists of all of the contents of the cell inside the plasma membrane. 
nucleus - The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.
plastid - 
The plastid is a major double-membrane organelle found in the cells of plants, algae, and some other eukaryotic organisms
vacoule - 
vacuole is a membrane-bound organelle which is present in all plant and fungal cells and some protist, animal and bacterial cells. Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution
mitochondria- 
Mitochondria are organelles, or parts of a eukaryotic cell They make most of the cell's supply of adenosine triphosphate (ATP), a molecule that cells use as a source of energy. Their main job is to convert energy.
lysosomes - 
lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles that contain hydrolytic enzymes that can break down many kinds of biomolecules.
ATP molecules - 
The Adenosine triphosphate (ATP) molecule also known as molecular currency  is used to store and transport chemical energy within cells
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