IB biology

1. Specialized transmembrane proteins that open or close in response to changes in the electrical potential across a cell membrane, allowing the selective flow of ions.
4. Maintaining a stable internal condition.
6. The shedding of uterine outer lining.
8. Carrier organism that transmits diseases.
11. Is the folding of the cell membrane to create pockets or grooves
13. Makes cells wide and thin
18. The original purpose of the CRISPR system in bacteria.
19. Signaling molecules that pass through the membrane easily.
20. Kingdom lacking cell walls.
24. Virus spread by mosquitos.
26. Human cells that contain multiple nuclei.
28. What distributes excess cholesterol to tissues, potentially contributing to cardiovascular problems?
29. Cancer causing agents.
30. The reason viral evolution is hard to trace due to the lack of ?

2. Intake of nutrients that are needed for proper function.
3. Increase surface area through finger-like extensions off the cell membrane
5. Enzymes that regulate proteins through phosphorylation.
7. Cells that produce myelin in the nervous system.
9. What blood types can a person with type O blood receive in a blood transfusion?
10. Drugs that are ineffective against viruses because they target bacteria.
12. Body process that helps maintain a stable temperature.
14. Receptors that activate G proteins when a ligand binds
15. Awareness that can't be completely controlled.
16. When enzymes cut and insert DNA.
17. A double layer structure made by phospholipids.
21. Cells where mutations are more common due to divisions.
22. Reproductive cells with a short lifetime.
23. mOuter layer that gives shape and protection in bacteria.
25. Global outbreak that caused widespread concern.
27. A mutation that doesn't change the amino acid sequence.