Proteins for sure because lipids don't have enough antigen
Photosynthetic organisms capture energy from sunlight with pigments.
Answer:
Sperm-egg interaction
Explanation:
The formation of fertilization envelope is well-studied on the model system- sea urchin. It has been shown that, the fertilization envelope is formed after the initial sperm-egg interaction from the egg surface vitelline envelope and the paracrystalline protein fraction which is derived from cortical granules. Secretion from cortical granules, prevents polyspermy.
Answer:
Binding the rna polymerase to the promoter sequence
Nuclear Membrane
The nuclear membrane is a double layer that encloses the cell's nucleus, where the chromosomes reside
