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An antigen is a molecule that is located on viruses, bacteria, cancer cells, and other pathogens. An antigen is very specific to each pathogen. A flu antigen is different from a pneumonia antigen, and an HIV antigen is different from a measles antigen. I like to think of an antigen as a lock, understanding that all locks are different and very specific. The key that fits these antigen locks is called an antibody. Antibodiesare found on certain types of white blood cells that our body produces. Antibody-producing white blood cells are called lymphocytes. Lymphocytes travel around our body and attach antibodies to pathogen antigens. Once an antigen has an antibody attached to it, phagocytes attack the pathogen, engulf it, and kill it. Sometimes the antibody disables the pathogen so that it cannot reproduce or release toxins.
Source
BYU Course BIOL 049 Lesson 3
What else can I help you with?
Is a CD4 molecule also a type of antigen?
No, a CD4 molecule is not an antigen. CD4 is a protein found on the surface of helper T cells, a type of immune cell that plays a crucial role in the adaptive immune response by helping to coordinate immune responses. Antigens are molecules that can be recognized by the immune system, such as proteins on the surface of pathogens or foreign substances.
A DNA molecule consists of how many stands?
The DNA molecule has two strands connected by a sugar phosphate backbone.
A marker molecule on a cell that the immune system uses to recognize a pathogen?
The major histocompatibility complex (MHC) molecules are marker molecules on cells that the immune system uses to recognize pathogens. MHC molecules present fragments of pathogens on the cell surface to alert immune cells to the presence of the pathogen. This helps the immune system to target and eliminate infected cells.
What is the organic molecule of the waxy surface on plants?
Carbohydrates
What is the potential energy surface of a molecule?
The potential energy surface of a molecule is a 3D map showing the molecule's potential energy at different atomic configurations. It reveals how the molecule's energy changes as its atoms move relative to each other. This information is crucial for understanding chemical reactions and molecular behavior.
What occurs when pathogens are transferred from one surface to another?
When pathogens are transferred from one surface to another, it can lead to the contamination of the new surface. This can increase the risk of infection if individuals come into contact with the contaminated surface. Regular cleaning and proper hygiene practices can help reduce the spread of pathogens between surfaces.
Is a CD4 molecule also a type of antigen?
No, a CD4 molecule is not an antigen. CD4 is a protein found on the surface of helper T cells, a type of immune cell that plays a crucial role in the adaptive immune response by helping to coordinate immune responses. Antigens are molecules that can be recognized by the immune system, such as proteins on the surface of pathogens or foreign substances.
What occurred when pathogens are tranfered from one surface to another?
When pathogens are transferred from one surface to another, they can potentially contaminate the new surface, leading to the risk of infection if a person comes into contact with it. This transfer can occur through direct touch, airborne particles, or contaminated objects. The viability of the pathogens depends on factors such as the type of pathogen, the surface material, and environmental conditions. Effective cleaning and disinfection practices are essential to mitigate the spread of these pathogens.
How are the strands of the DNA molecule connected with one onother?
spirally
What is a Whole water molecule?
One water molecule is a combination of one Oxygen molecule and 2 Hydrogen molecules connected through a covalent bond.
A DNA molecule consists of how many stands?
The DNA molecule has two strands connected by a sugar phosphate backbone.
To what do antibodies attach on the pathogen?
Antibodies attach to specific antigens on the surface of pathogens.
A marker molecule on a cell that the immune system uses to recognize a pathogen?
The major histocompatibility complex (MHC) molecules are marker molecules on cells that the immune system uses to recognize pathogens. MHC molecules present fragments of pathogens on the cell surface to alert immune cells to the presence of the pathogen. This helps the immune system to target and eliminate infected cells.
What is attached to surface of pathogens?
Pathogens typically have various structures attached to their surfaces, such as proteins, carbohydrates, and lipids, which can include adhesins, pili, and fimbriae. These components help pathogens adhere to host cells, evade the immune system, and facilitate infection. Additionally, some pathogens possess surface antigens that can trigger immune responses, while others may have protective capsules to enhance their virulence.
What happens if a molecule with a high kinetic energy happenes to be close to the liquid's surface?
Then that molecule will escape the surface of the liquid and become a molecule of gas. This is the process by which water slowly evaporates even when not heated.
Is carbon a molecule or a atom?
Carbon is an element. Elements are atoms at its simplest. A molecule is a collection of atoms connected by an electric charge.
Which part of a phospholipid molecule contains a phosphate group?
Phospholipid molecule is actually almost similar to a lipid molecule. It is a alcohol connected to 2 fatty acids and a phosphate group.(In lipids, its connected to 3 fatty acids)
