Asked by: Hammed Diderich
science biological sciences

Which of the following molecules can pass through the lipid bilayer?

Last Updated: 28th June, 2020

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Lipid-soluble molecules can readily pass through a lipid bilayer. Examples include gas molecules such as oxygen (O2) and carbon dioxide (CO2), steroid molecules, and fat-soluble vitamins (A, D, E, and K).

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People also ask, what molecules can pass through the lipid bilayer?

The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.

Additionally, what can pass through the phospholipid bilayer quizlet? Small, nonpolar molecules are hydrophobic, so they can easily cross the phospholipid bilayer of the plasma membrane. Polar molecules and ions are hydrophilic, so they cannot very easily cross the hydrophobic portion of the plasma membrane (formed by the phospholipid tails).

Similarly one may ask, what molecules can pass through the cell membrane?

Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly. On the other hand, cell membranes restrict diffusion of highly charged molecules, such as ions, and large molecules, such as sugars and amino acids.

What 3 molecules Cannot easily pass through the membrane?

The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

Related Question Answers

Silas Bluhmel

Professional

Can water pass through lipid bilayer?

Water can diffuse through the lipid bilayer even though it's polar because it's a very small molecule. Water can also pass through the cell membrane by osmosis, because of the high osmotic pressure difference between the inside and the outside the cell.

Sashko Brant

Professional

What is a lipid bilayer made of?

membrane lipids
A bilayer is composed of two sheets of phospholipid molecules with all of the molecules of each sheet aligned in the same direction. In a water medium, the phospholipids of the two sheets align so that their water-repellent, lipid-soluble tails are turned and… … common of which is the bilayer.

Adella Bogdanova

Professional

What is meant by a lipid bilayer?

The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells.

Facundo Ferrel

Explainer

How lipid bilayer is formed?

Being cylindrical, phospholipid molecules spontaneously form bilayers in aqueous environments. In this energetically most-favorable arrangement, the hydrophilic heads face the water at each surface of the bilayer, and the hydrophobic tails are shielded from the water in the interior.

Hug Ursua

Explainer

What has a phospholipid bilayer?

The phospholipid bilayer consists of two layers of phospholipids, with a hydrophobic, or water-hating, interior and a hydrophilic, or water-loving, exterior. The hydrophilic (polar) head group and hydrophobic tails (fatty acid chains) are depicted in the single phospholipid molecule.

Souaad Mathiessen

Explainer

Can sucrose cross the lipid bilayer?

The sucrose molecules will not leave the cell because they cannot pass through the membrane. However, since there is less water on the side with the sucrose, water will enter the cell by osmosis.

Philip Schniederjurgen

Pundit

Is diffusion active or passive?

This process is called passive transport or facilitated diffusion, and does not require energy. The solute can move "uphill," from regions of lower to higher concentration. This process is called active transport, and requires some form of chemical energy.

Sherita Gausmann

Pundit

What can passively diffuse across a membrane?

Gases and some small, uncharged molecules, such as ethanol and urea, enter and leave cells by passive diffusion across the plasma membrane.

Hikmat Schindeldecker

Pundit

Do all cells have a cell wall?

Cell wall. Many kinds of prokaryotes and eukaryotes contain a structure outside the cell membrane called the cell wall. With only a few exceptions, all prokaryotes have thick, rigid cell walls that give them their shape. Among the eukaryotes, some protists, and all fungi and plants, have cell walls.

Kazi Rochina

Pundit

What is the cell wall made of?

Plant cell walls are primarily made of cellulose, which is the most abundant macromolecule on Earth. Cellulose fibers are long, linear polymers of hundreds of glucose molecules. These fibers aggregate into bundles of about 40, which are called microfibrils.

Meiqin Sahraoui

Pundit

Do all cells have a nucleus?

Not all cells have a nucleus. Biology breaks cell types into eukaryotic (those with a defined nucleus) and prokaryotic (those with no defined nucleus). You may have heard of chromatin and DNA. If you don't have a defined nucleus, your DNA is probably floating around the cell in a region called the nucleoid.

Radmila Kaesmacher

Teacher

Do all cells have cytoplasm?

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Ribosomes are the non-membrane bound organelles where proteins are made, a process called protein synthesis. The cytoplasm is all the contents of the cell inside the cell membrane, not including the nucleus.

Aihong Schlossberg

Teacher

Is osmosis active or passive?

osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane, so little energy is required to carry out this process, thus it is a form or passive transport.

Scheherazade Jaede

Teacher

What makes up the cell membrane?

Phospholipids make up the basic structure of a cell membrane. This arrangement of phospholipid molecules makes up the lipid bilayer. The phospholipids of a cell membrane are arranged in a double layer called the lipid bilayer. The hydrophilic phosphate heads are always arranged so that they are near water.

Koichi Laranjeira

Teacher

What is a cytoplasm in a cell?

Function of Cytoplasm. The jelly-like fluid that fills a cell is called cytoplasm. It is made up of mostly water and salt. Cytoplasm is present within the cell membrane of all cell types and contains all organelles and cell parts. Cytosol is the part of the cytoplasm that does not contain organelles.

Courage Srikrisna

Reviewer

What is the role of the cell membrane?

The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

Jihad Natxitube

Reviewer

Where is the cell membrane located?

Answer and Explanation:
The cell membrane is located on the outside of a cell. It acts as a border that separates the cell from other cells or substances in the environment.

Lanell Bereziartua

Reviewer

What stabilizes the phospholipid bilayer?

The lipid bilayer is a noncovalent assembly. The proteins and lipid molecules are held together by noncovalent interactions such as Van der Waals forces (which holds the hydrophobic tails together) and hydrogen bonding (which binds the hydrophilic heads with water), which help to stabilize the lipid bilayer structure.

Bernardino Gahete

Reviewer

What is the cell membrane made of quizlet?

1. The plasma membrane (cell membrane) is made of two layers of phospholipids. 3. The plasma membrane regulates the entry and exit of the cell.