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What is to living organisms as atoms are to molecules?
Cells are to living organisms as atoms are to molecules. Cells are the basic structural and functional units of living organisms, similar to how atoms are the building blocks of molecules. Just as molecules are made up of atoms, living organisms are made up of cells that work together to carry out essential functions.
What functional group plays a major role in energy transfer?
The functional group that plays a major role in energy transfer is the phosphate group. This group is found in molecules like ATP (adenosine triphosphate), which carries energy within cells for various cellular processes.
Where are Class II molecules found?
Presented by APCs as MHC-exogenous peptide complex
What is large molecules to small molecules called?
The process of breaking down large molecules into smaller molecules is called catabolism. This process releases energy that cells can use for various functions.
How do molecules of food rearrange when they react with oxygen in the cells of your body?
When food molecules react with oxygen in the cells of your body through a process called cellular respiration, they are broken down to release energy in the form of ATP. This involves a series of chemical reactions that convert complex food molecules into simpler molecules like carbon dioxide, water, and ATP. These rearrangements allow your cells to generate the energy needed to carry out essential functions.
Do T cells have major histocompatibility complex (MHC) molecules?
Yes, T cells have major histocompatibility complex (MHC) molecules.
Do antigen presenting cells have major histocompatibility complex class I molecules?
Yes, antigen presenting cells have major histocompatibility complex class I molecules.
How do phagocytes recognize foreign cells or bacteria?
Lymphocytes are part of the human body's innate immune system. Natural killer cells seek out and destroy foreign cells by distinguishing surface molecules of major histocompatibility complex class.
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.
How do some molecules get into cells?
Some molecules get into cells by going through their permeable membrane.
What is the major molecule in plants?
The major molecule in plants is cellulose. Cellulose is a polysaccharide that forms the structural component of plant cell walls, providing rigidity and support to plant cells and tissues. It is one of the most abundant organic compounds on Earth.
What major fuel is used for the cell's activities in the human body?
Cells primarily use carbohydrates, especially glucose, which is broken down during cellular respiration, forming molecules of ATP, which are used by the cells in order to get energy to do work (cellular activities). Cells get energy from ATP molecules when they are broken down into ADP and P, which releases energy.
Which major class of lymphocytes become cytotoxic T cells?
CD8+ T lymphocytes, also known as cytotoxic T cells, become cytotoxic when they are activated by presenting antigens on major histocompatibility complex class I molecules. These cells play a key role in the immune response by directly killing infected or abnormal cells.
Level of organisation in a plant does molecules come before cells?
Yes. Cells are made of molecules.
Is cell larger than molecule?
Cells are larger than molecules. Cells normally have molecules inside them and constantly passing through their membranes. Cells normally contain water molecules along with glucose and other molecules.
What cell is not and antigen presenting cell?
Red blood cells are not antigen presenting cells because they lack major histocompatibility complex (MHC) molecules, which are required for presenting antigens to T cells.
What molecule displays an antigen on the surface of the cells?
Major histocompatibility complex (MHC) molecules display antigens on the surface of cells. There are two main classes: MHC class I, which presents antigens to CD8+ cytotoxic T cells, and MHC class II, which presents antigens to CD4+ helper T cells. These molecules play a crucial role in the immune response by enabling the recognition of foreign substances by T cells.
