Cell Membrane and Cell Transport

All cells have a thin, flexible, protective layer around them called

• the cell membrane

• the mitochondria

• the cytoplasm

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The cell membrane is made of a _________________ that allows materials IN and OUT of the cell.

• phospholipid bilayer

• nucleus

• firm, non-flexible layer

Tags

NGSS.MS-LS1-2

The bilayer of the cell membrane is made of

• lipids (phospholipids)

• ribosomes

• carbohydrates

Tags

NGSS.MS-LS1-2

Lipids (phospholipids) are made of a _______________ head and a _______________ tail.

• hydrophobic, hydrophilic

• hydrophilic, hydrophobic

Active transport across a cell membrane from low to high concentration, requires

• energy (ATP)

• no energy

• water

• oxygen

In the context of cell transport, what is the main difference between active transport and passive transport?

• Active transport requires energy, while passive transport does not.

• Passive transport requires energy, while active transport does not.

• Active transport can only move materials out of the cell, while passive transport can move materials in both directions.

• Passive transport can only move materials into the cell, while active transport can move materials in both directions.

Which of the following is NOT a component of the cell membrane?

• Phospholipids

• Ribosomes

• Proteins

• Cholesterol

All of the following are materials that make up the cell membrane EXCEPT:

• phospholipids

• proteins

• carbohydrates

• nucleus

Tags

NGSS.MS-LS1-2

If a substance is able to cross a membrane, the membrane is said to be

• permeable

• impermeable

• selectively permeable

Most biological membranes are _______________ - meaning that some substances can pass and others cannot.

• permeable

• impermeable

• selectively permeable