Passive Transport and Diffusion in Cells

Play an AI-generated podcast conversation about this lesson

What is the main function of lysosomes in the cell?

Store genetic material like DNA

Break down macromolecules like proteins and nucleic acids (correct)

Maintain an acidic pH environment

Generate energy through cellular respiration

How are enzymes synthesized and delivered to lysosomes?

Delivered directly by Golgi to lysosomes

Synthesized in lysosomes, then delivered by vesicles

Synthesized in rough ER, sorted in Golgi, then packaged into lysosomes (correct)

Packed by Golgi in lysosomes directly

What is the role of mitochondria in eukaryotic cells?

Break down macromolecules for energy production

Generate usable energy through cellular respiration (correct)

Store genetic information in circular genomes

Maintain an acidic pH environment

What makes mitochondria and chloroplasts semi-autonomous organelles?

They have circular genomes and grow independently of other compartments Signup and view all the answers

Which organelle is responsible for maintaining an acidic internal environment in the cell?

Lysosomes Signup and view all the answers

What is the primary function of contractile vacuoles in the cell?

Regulate water content and prevent cell swelling Signup and view all the answers

What is the function of turgor pressure in a cell?

To resist deformation of the cell wall Signup and view all the answers

Which organelle contributes to turgor pressure in plant and fungal cells?

Vacuole Signup and view all the answers

What is the role of the cytoskeleton in a cell?

Maintaining shape and serving as a network of tracks for movement of substances Signup and view all the answers

What is the main function of a contractile vacuole in a cell?

Expelling excess water from the cell Signup and view all the answers

How does the endomembrane system compartmentalize a cell?

By facilitating communication between organelles through membrane 'bridges' Signup and view all the answers

What is the primary role of the cytoplasm in a cell?

To provide a jelly-like environment surrounding organelles Signup and view all the answers

Which type of transport involves the net movement of substances from areas of higher to lower concentration?

Simple diffusion Signup and view all the answers

What is the primary source of energy for primary active transport?

ATP Signup and view all the answers

What is the main function of aquaporins in cell membranes?

Facilitated diffusion of water Signup and view all the answers

What type of transport utilizes the energy of an electrochemical gradient to drive movement of ions or molecules?

Secondary active transport Signup and view all the answers

Which process is responsible for the movement of water across a selectively permeable membrane?

Osmosis Signup and view all the answers

What prevents cells from lysing or bursting due to excessive water intake in protists and single-celled eukaryotes?

Contractile vacuoles Signup and view all the answers

Which structure helps maintain the shape and internal composition of cells by being external to the cell membrane?

Cell wall Signup and view all the answers