It can be anchored to the cytosolic half of fthe lipid bilayer by an amphipathic alpha helix. It can be covalently attached to a lipid molecule on either side of hte bilayer. It can be attached to the membrane by relatively weak, noncovalent interactions with other membrane proteins.

The question is incomplete. The complete question has been attached below.

Option (1).

Explanation:

The plasma membrane or cell membrane consists of the lipid bilayer as well different types of proteins. Carbohydrates are also present in the plasma membrane in association with lipid and proteins.

The protein may be inserted in the plasma membrane as intergral membrane proteins or may span the membrane bilayer as transmembrane protein. The protein is attached with lipid bilayer by spanning the layer as alpha helix or barrel proteins.

Thus, the correct answer is option (1).

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.