Unit 2 AP Bio

Which of the following identifies the number of water molecules needed to remove the amino acids from a polypeptide with 20 amino acids?

• 19

• 20

• 21

• 22

Which is the easiest to cross the membrane unassisted?

• Small, nonpolar

• Small, polar

• Large, nonpolar

• Large, polar

If the intracellular concentration is 1.0 M and extracellular concentration is 0.4M. Which direction does water flow?

• Both in and out (equilibrium)

• Into the cell

• Out of the cell

Tags

NGSS.HS-LS1-3

Which organelle helps protist in freshwater?

• Central vacuole

• Contractile vacuole

• Golgi bodies

• Nucleus

Tags

NGSS.MS-LS1-2

In a turgid plant cell, which describes pressure potential of cell water

• Negative

• Positive

Extracellular solution is 0.5M and the cell is 1.0M – which direction will water flow?

• Into cell towards hypertonic solution

• Into cell towards hypotonic solution

• Out of cell toward hypertonic solution

• Out of cell toward hypotonic solution

Tags

NGSS.HS-LS1-3

Pressure potential = 0.2 MPa and solute potential = - 0.6 MPa…

• Water Potential = -0.8MPa

• Water Potential = -0.4 MPa

• Water Potential = 0.4 MPa

• Water Potential = 0.8 MPa

Passive transport

• Does not require input of energy and moves against gradient

• Does not require input of energy and moves with gradient

• Requires input of energy and moves against gradient

• Requires input of energy and moves with gradient

How does oxygen enter blood cells in the lungs?

• Active transport

• Bulk transport

• Facilitated transport

• Simple diffusion

Why is the inner membrane of the mitochondria highly folded?

• Increase volume of mitochondria

• Increase in surface area for oxidative phosphorylation

• Decrease volume of mitochondria

• Decrease in surface area for oxidative phosphorylation