Transport Across Membranes: Protein Structure and Function

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What is the driving force for diffusion, movement, or transport to happen?

Concentration gradient (correct)

Carrier proteins

Channel proteins

ATP

In which direction does movement occur when solute moves from a lower concentration to a higher concentration?

Against the concentration gradient

Down the concentration gradient

Up the concentration gradient (correct)

Along the channel protein

What type of transport is opposite to the concentration gradient?

Active transport (correct)

Facilitated diffusion

Passive transport

Simple diffusion

What is an indication that a transport process is active rather than passive?

Use of carrier proteins Signup and view all the answers

Why can ions not easily pass through the cell membrane?

High hydrophobicity of the membrane interior Signup and view all the answers

Why is the presence of ATP a good indication of active transport?

ATP is involved in providing energy for moving solutes against the concentration gradient Signup and view all the answers

What is the main factor driving movement in diffusion?

Concentration gradient Signup and view all the answers

In which type of transport does water move to achieve equilibrium?

Osmosis Signup and view all the answers

What happens to a cell in a hypertonic solution?

Cell shrinks Signup and view all the answers

What is the role of GLUT1 in cellular transport?

Transporting glucose Signup and view all the answers

Which process involves the combined effect of concentration gradient and charge gradient?

Active transport Signup and view all the answers

What is the main difference between isotonic and hypotonic solutions?

Hypotonic causes cell to burst, while isotonic maintains cell size. Signup and view all the answers

What type of transport involves the movement of one solute in one direction?

Uniport Signup and view all the answers

Which type of channel protein allows the rapid passage of various solutes across membranes?

Porins Signup and view all the answers

In which type of transport do carrier proteins move two solutes simultaneously?

Coupled Signup and view all the answers

Transport Across Membranes: Protein Structure and Function

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Questions and Answers

What is the driving force for diffusion, movement, or transport to happen?

In which direction does movement occur when solute moves from a lower concentration to a higher concentration?

What type of transport is opposite to the concentration gradient?

What is an indication that a transport process is active rather than passive?

Why can ions not easily pass through the cell membrane?

Why is the presence of ATP a good indication of active transport?

What is the main factor driving movement in diffusion?

In which type of transport does water move to achieve equilibrium?

What happens to a cell in a hypertonic solution?

What is the role of GLUT1 in cellular transport?

Which process involves the combined effect of concentration gradient and charge gradient?

What is the main difference between isotonic and hypotonic solutions?

What type of transport involves the movement of one solute in one direction?

Which type of channel protein allows the rapid passage of various solutes across membranes?

In which type of transport do carrier proteins move two solutes simultaneously?

Which transmembrane protein is responsible for facilitating the direct crossing of specific solutes?

What type of transport moves solutes in the opposite direction?

Which channel protein structure is tetrameric with four central atoms?

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