2A Cell Structure

4. The material made of DNA and proteins found in the nucleus.
6. Openings in the nuclear envelope that allow substances to move between the nucleus and cytoplasm.
8. A structure made of different tissues that work together to perform a specific function.
11. The main bacterial genetic material that floats freely in the cytoplasm.
12. The folds of the inner mitochondrial membrane where respiration occurs.
14. Vesicles containing digestive enzymes used to break down invading cells or worn-out components.
15. A network of membranes covered in ribosomes that synthesises and processes proteins.
20. Regulates movement of substances into and out of the cell and responds to chemical signals.
21. Tiny folds of the cell-surface membrane that increase surface area for absorption.
23. The double membrane surrounding the nucleus.
24. The protective layer surrounding the genetic material of a virus.
25. A tail-like structure that allows bacteria to move.
26. The structure inside the nucleus where ribosomes are made.
27. The fluid inside the mitochondrion containing enzymes for respiration.

1. The method by which prokaryotic cells divide to produce two daughter cells.
2. A slimy outer layer in some bacteria that protects against the immune system.
3. Organelles that provide energy for the cell through aerobic respiration.
5. An organelle that synthesises and processes lipids.
7. Structures on a virus that enable it to attach to specific host cells.
9. A group of organs working together to carry out a particular function.
10. An organelle that digests invading cells or breaks down worn-out cell components.
13. A group of similar cells that work together to perform a function.
16. A group of fluid-filled, membrane-bound, flattened sacs that process and package proteins and lipids.
17. A small loop of DNA in bacteria that contains extra genes, such as those for antibiotic resistance.
18. Small organelles where proteins are synthesised.
19. Controls cell activities by controlling transcription of DNA.
20. A rigid layer surrounding some cells that provides strength and support.
22. The outer layer of the mitochondrion that controls entry and exit of materials.