Properties of Water, Cells, Cell Organells

Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

• All living things are made of cells.

• All cells come from other preexisting cells.

• Cells form through spontaneous generation.

• Cells are the basic structural and functional units of life.

A plant and an animal are both living things. According to the Cell Theory, what can you conclude about these two very different organisms?

• Plants have cells but animals do not.

• They are both made of one or more cells.

• They both come from the same kind of cell.

• They both come from a non-living organism.

Tags

NGSS.MS-LS1-1

The combined observations of Mattias Schleiden, Theodor Schwann and Rudolph Virchow resulted in the formation of the cell theory. Which of the following is not part of the cell theory?

• All cells contain a nucleus.

• All cells come from other living cells.

• All living organisms are made of one or more cells.

• Cells are the basic unit of structure and function of all living things.

Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. How would you define this type of transport across the cell membrane?

• active transport

• passive transport

• facilitated diffusion

• co-transport

The diagram represents a cell of a green plant. Solar energy is used to produce energy-rich compounds in which structure?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?

• The swollen gums have absorbed the saltwater solution.

• The saltwater solution lowers the temperature of the water in the gums.

• The salt in the solution has moved against the concentration gradient.

• The water in the gums has moved out due to the high concentration of salt in the solution.

Tags

NGSS.MS-PS1-2

The diagram represents a cell. Which organelle is the site where amino acids are synthesized into proteins?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS1-2

Joy took the notes shown below while learning about cells: Forms boundary between a cell and the outside environment; Controls the movement of materials into and out of the cell; Consists of double layer of phospholipids. She forgot to write the name of the cell structure that her class was studying that day. What structure is described in her notes?

• endoplasmic reticulum

• cell membrane

• cell wall

• nucleus

Tags

NGSS.MS-LS1-2

Which choice best completes the concept map showing a cell that is surrounded by a rigid coat of cellulose, has a well-defined nuclear membrane and DNA, and contains mitochondria and chloroplasts?

• an animal cell

• a prokaryotic cell

• a virus

• a plant cell

Tags

NGSS.MS-LS1-2

Look at the cross-section diagram of a cell membrane. The cell membrane controls movement of materials into and out of the cell. The particles shown are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?

• simple osmosis

• active transport

• simple diffusion

• facilitated diffusion