BIOLOGY: DIFFUSION

Which direction do particles move in the process of diffusion?

• Low to high concentration

• High to low concentration

How would you describe the movement of particles in the process of diffusion?

• Random

• Ordered

what is the one state in which diffusion cannot occur?

• Liquid

• Gas

• Solid

During the dye making process, what happens to the dye particles when they are added to the water?

• They stick together

• They spread out

What is another example of diffusion?

• Photosynthesis

• Osmosis

• Combustion

Which of these statements about diffusion of molecules is true?

• Facilitated diffusion is powered entirely by GTP hydrolysis

• Never needs the presence of any other molecule

• Diffusion of every molecule is dependent on its concentration gradient and independent of the concentration of other molecular species in the medium

• All of the above

If there was a coolant near the mouth of a crucible heating iodine how would that affect its rate of diffusion?

• Would remain unchanged

• Increase

• Decrease

• It would depend on the nature and temperature of the coolant

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Which of these statements is NOT true?

• Large polar molecules cannot diffuse across a biological membrane

• Carbon dioxide would diffuse faster than bromine gas

• Integral membrane proteins that facilitate diffusion are highly specific about their cargo

• All of the above

Tags

NGSS.HS-LS2-3