Which of the following is surrounded by two phospholipid bilayers?

the ribosomes

the vesicles

the cytoplasm

the nucleoplasm

The correct answer will be option-the nucleoplasm.

Explanation:

The nucleoplasm is the nuclear sap which is enveloped or enclosed by the nuclear envelope. The nucleoplasm contains the nucleolus, enzymes and the chromosomes.

The nuclear envelope is made up of two layers of the lipids called the outer and inner membrane which are composed of lipids. The envelope contains the nuclear pore to transport substances like mRNA.

Thus, option-the nucleoplasm is the correct answer.