Unit 2 Practice Test (v2)

Which statement about active transport is most accurate?

• Active transport utilizes energy from ATP molecules.

• Active transport is essential to move water into and out of a cell.

• Active transport is the only way to move ions into and out of a cell.

• Active transport is required to move ions into and out of a cell.

Single-celled pond organisms have contractile vacuoles that maintain water balance within each cell. This is a an example of what scientific principle?

• buffering

• homeostasis

• osmosis

• photosynthesis

Tags

NGSS.HS-LS1-3

Which process involves the movement of molecules across the plasma membrane from areas of high to low concentration without any assistance or energy from the cell?

• active transport

• diffusion

• facilitated diffusion

• metabolism

How is Adenosine Triphosphate (ATP) used in the digestion, respiration, and excretion processes in all cells?

• for the transport of proteins

• for the transport of carbon dioxide

• as the source of energy

• as the source of oxygen

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

A student with swollen gums gargles with warm salt water and experiences decreased swelling. Which statement best explains what has occurred?

• The high temperature of the warm salt water kills all infection-causing microbes.

• The saltwater solution is absorbed by cells in the gums.

• The water in the gums moves from a high to a low concentration of water.

• The salt in the saltwater solution is transferred into the cells through passive transport.

The paramecium contains a contractile vacuole that helps regulate water balance. Its cytoplasm contains a greater solute concentration compared to its freshwater environment, so water moves into the organism.

How does the contractile vacuole help regulate the excess water?

• The contractile vacuole collects and stores all the excess water.

• The contractile vacuole swells and expels the water outside.

• The contractile vacuole reduces the solute concentration in the cytoplasm.

• The contractile vacuole distributes the water to different organelles for use.

Tags

NGSS.HS-LS1-3

What cell structure's primary role is cellular mobility?

• 
• 
• 
• 

Tags

NGSS.MS-LS1-2

What structure is specialized for the detection of the stimulus that triggers a phototaxic response in certain protist?

• 
• 
• 
• 

Which statement describes the difference between the DNA of a prokaryotic cell and a eukaryotic cell?

• Eukaryotic cells have circular DNA contained in a nucleus.

• Eukaryotic cells have DNA contained in chromosomes not inside a nucleus.

• Prokaryotic cells have circular DNA not contained in a nucleus.

• Prokaryotic cells have DNA contained in chromosomes inside a nucleus.

What is one important consequence of the structure of the lipid bilayer in the cell membrane?

• It inhibits the movement of large, polar molecules directly across the membrane.

• It inhibits the movement of small, non-polar molecules across the membrane.

• The absence of proteins from the membrane ensures that there is no interference with osmosis.

• The membrane provides a rigid, inflexible structure to help support plants against gravity.