Cells Xword

3. Marker molecules that can be detected by antibodies
5. Can lead to AIDS
6. A form of immunity provided by the immune response of the body upon detection of a pathogen.
9. The introduction of dead or inactive pathogens to stimulate an immune response to provide long term immunity.
10. The response produced by the immune system when it encounters a pathogen for the first time.
11. An organelle found in plants and algae that is the site of photosynthesis.
12. A phospholipid bilayer studded with proteins that surrounds cells
13. A whip-like structure found on bacterial cells that is used for cell movement.
14. The passive diffusion of water molecules
15. A circular loop of DNA found in the cytoplasm of bacterial cells.
16. An organelle found in eukaryotic cells only
17. A protein found in the blood that is produced by plasma cells which binds to antigens.
19. A type of disease immunity that occurs when a large proportion of a population are vaccinated against a disease
20. The clumping together of cells or particles caused by antibodies which assists phagocytosis.
21. The ability to distinguish two different points in a specimen.

1. A form of immunity provided by the introduction of antibodies to a disease into the body.
2. The response produced by the immune system when it recognises a pathogen that it has encountered before.
3. The active movement of substances from a low concentration to a higher concentration
4. The process of matching the antigens on an antigen presenting cells with the antigen receptors on B and T lymphocytes.
5. A type of T cell in the immune system that stimulates cytotoxic T cells, B cells and phagocytes.
7. The method of cell division used by prokaryotes
8. The process where phagocytes engulf and destroy material.
12. A method of membrane transport where two substances are both transported across a membrane at the same time.
18. An organelle found in eukaryotic cells that is involved in the modification and packaging of proteins.