Question

which molecules do not normally cross the nuclear membrane? nucleotide triphosphates mrna proteins dna

Explanation:

DNA is a large, double - stranded molecule that is normally confined within the nucleus. It does not cross the nuclear membrane under normal circumstances. mRNA is synthesized in the nucleus and then transported out of the nucleus through nuclear pores. Proteins can enter and exit the nucleus through nuclear pores. Nucleotide triphosphates are small molecules that can cross the nuclear membrane for DNA and RNA synthesis.

Answer:

DNA