Unit 3 Test: Cells

Not all cells are alike. Which of the following is NOT a true statement about differences between cells?

• Cells come in many different shapes.
• Different kinds of cells are different sizes.
• Some cells have a nucleus, but others do not.
• Most cells have a membrane, but some do not.

Tags

B-LS1-2

Which of the following organisms is an example of a prokaryote?

• plants
• animals
• bacteria
• fungi

Tags

B-LS1-2

Which principle of cell theory best supports the idea that new cells will replace damaged cells in a scraped knee?

• All living things are made of one or more cells.
• Cells are the basic unit of life.
• All cells come from other cells.
• The nucleus of cells in animals reproduces when exposed to air.

Tags

NGSS.HS-LS1-4

Where can you find ribosomes in the cell?

• cytoplasm
• rough ER
• smooth ER
• cytoplasm and rough ER
• smooth ER and rough ER

Students come across across a packet of chips and wonder how their body uses it for energy. Which organelle in their cells converts the chemical energy stored in the chips into a more useable energy source (ATP) through the process of cellular respiration?

• chloroplast

• Golgi apparatus

• endoplasmic reticulum

• mitochondria

Tags

NGSS.HS-LS1-7

The primary function of the cell wall is to...

• support and protect the cell.
• store DNA.
• direct the activities of the cell.
• help the cell move.

Tags

NGSS.MS-LS1-2

If a cell's plasma (cell) membrane stopped working, which of the following would be a logical conclusion?

• The cell would not be able to make proteins.
• The cell would not be able to regulate materials coming in and out of the cell.
• The cell would not be able to sort and package proteins so they can be shipped out of the cell.
• The cell would not be able to carry out cellular respiration.

Tags

NGSS.HS-LS1-3

Which of the following statements regarding the movement of molecules across cell membranes is true?

• In facilitated diffusion, a molecule is moved across a membrane against its concentration gradient.
• Water molecules are commonly actively transported out of cells using ATP energy.
• Three examples of passive transport are diffusion, facilitated diffusion, and osmosis.
• Polar molecules generally diffuse more readily through the plasma membrane than do nonpolar molecules of the same size.

The diffusion of water across a selectively permeable membrane is called...

• osmotic pressure
• osmosis
• pinocytosis
• active transport

In order for the body to function properly, cells must move molecules across the membrane to maintain homeostasis. Which of the following accurately describes a mechanism for maintaining homeostasis at the cellular level?

• Passive transport, where ATP is used to facilitate the movement of molecules from high to low concentrations.
• Facilitated transport, where enzymes are used to increase the rate of solvent transfer across a membrane.
• Active transport, where the solution is pumped across a membrane from high to low concentrations.
• Active transport, where molecules are pumped across the cell membrane against the gradient from low to high concentration using ATP energy.