SB1d

A potato core was placed in a beaker of water as shown in the figure below. Which diagram best represents the net movement of molecules?

• A.

• B.

• C.

• D.

Tags

NGSS.MS-PS1-2

The following question(s) is/are based on the following situation and data table. A laboratory technician places red blood cells into three different solutions. Observations are recorded each minute for five minutes. Which of the following best explains what is causing the red blood cells in solution 1 to change size over the five-minute period?

• Solvent is entering the cells faster than it is leaving the cells.

• Solute is entering the cells faster than it is leaving the cells.

• The cells are making new protein.

• The cell’s membranes are dissolving.

Tags

NGSS.MS-LS1-2

The diagram shows a plant cell before and after it is placed in a solution. After the cell is placed in the solution, it changes shape. Which table shows the initial concentration of solute in the cell and in the solution that would cause the cell to change shape as shown in the diagram?

• Location: Inside cell 12%, Outside cell 12%

• Location: Inside cell 3%, Outside cell 6%

• Location: Inside cell 7%, Outside cell 5%

• Location: Inside cell 0%, Outside cell 0%

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

A student wants to model the net movement of water into a cell using a semi-permeable bag, water, a large beaker and salt. Which setup could he use to model the net movement of water into a cell?

• Place a bag containing a 20% salt solution into a beaker containing a 40% salt solution

• Place a bag containing a 30% salt solution into a beaker containing a 10% salt solution

• Place a bag containing a 30% salt solution into a beaker containing a 40% salt solution

• Place a bag containing a 10% salt solution into a beaker containing a 10% salt solution

An excess of hydrogen ions maintains the positive charge of the extracellular fluid surrounding plant cells. Plant cells use active transport to maintain this positive charge. Why must cells use active transport to maintain a positive charge?

• ATP is required to move all charged particles

• The concentration of hydrogen ions is lower inside the cell

• The hydrogen ions are too large to move freely across the cell membrane

• Passive transport can only be used to move particles with a negative charge

Tags

NGSS.MS-LS1-2

Oxygen and carbon dioxide molecules pass freely through cell membranes. Which factor determines the direction most molecules will pass through the cell membrane?

• the ionic charge on the outer shell of the gas molecules

• the concentration of the gas molecules on each side of the membrane

• the strength of the covalent bonds holding the gas atoms in the molecules

• the size of the gas molecules

Tags

NGSS.MS-LS1-2

The diagram below illustrates how plant root cells take in mineral ions from the surrounding soil. Which of the following processes is illustrated?

• active transport

• diffusion

• osmosis

• passive filtration

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

Which of the diagrams below best represents the net movement of molecules in osmosis?

• A

• B

• C

• D

The table below lists the concentrations of water inside and outside a cell under four different conditions. Under which condition will the cell experience a net loss of water to its environment?

• Condition 1

• Condition 2

• Condition 3

• Condition 4

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of these is the process by which water moves across a selectively permeable membrane?

• osmosis

• transpiration

• capillary action

• active transport

Tags

NGSS.MS-LS1-2