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How are macromolecules transported across the nuclear envelope? Describe the structure that regulates nuclear membrane permeability.

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Jean Keeling
Jean KeelingLv2
28 Sep 2019

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Related questions

Complete the following sentences to examine various components of the endomembrane system.

Information within the ____________ is transcribed into mRNA and transported outside the nuclear envelope.

Proteins, which are synthesized by ____________ , are then released into the ____________ , where they are further folded and modified.

The ____________ does not have attached ____________ and produces lipids, such as steroids.

Once proteins are folded and modified, transport vehicles called ____________ pinch off and surround them with membranes to be transported elsewhere.

The vesicles are moved to the ____________ where they are sorted and packaged.

Transport vehicles called ____________ carry the macromolecules to the ____________ where they fuse and release their contents to the outside environment.

ribosomes

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smooth endoplasmic reticulum

vesicles

plasma membrane

rough endoplasmic reticulum

nucleus

secretory vesicles

During mitosis, the breakdown of the nuclear envelope depends on the disassembly of
lamin filaments that form a meshwork supporting the membrane. How is that breakdown
accomplished?

Describe the chemical composition of each structures below. (Note that the chemical composition for many of the structures listed is a phospholipid bilayer.)

cell wall

chromatin

cytosol-

chloroplasts

chromoplasts

cytoskeleton

Golgi apparatus

leucoplasts

mitochondria

nuclear envelope

plasma membrane

peroxisomes

ribosomes

rough endoplasmic reticulum

smooth endoplasmic reticulum

tonoplast

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