BIOS 251 Chapter 3 Questions And Answers 2023 All Verified

BIOS 251 Chapter 3 Questions And Answers 2023 All Verified cells - Answer-are the basic, living, structural, and functional units of the body plasma membrane - Answer-1. Acts as a barrier separating inside and outside of the cell. 2. Controls the flow of substances into and out of the cell. 3. Helps identify the cell to other cells (e.g., immune cells). 4. Participates in intercellular signaling. cytoplasm - Answer-consists of all the cellular contents between the plasma membrane and the nucleus. This compartment has two components: cytosol and organelles cytosol - Answer-the fluid portion of cytoplasm, also called intracellular fluid, contains water, dissolved solutes, and suspended particles organelles - Answer-each has a characteristic shape and specific functions. Examples include the cytoskeleton, ribosomes, endoplasmic reticulum, Golgi complex, lysosomes, peroxisomes, and mitochondria nucleus - Answer-a spherical or oval-shaped structure that usually is the most prominent feature of a cell; is a large organelle that houses most of a cell's DNA; 1. Controls cellular structure. 2. Directs cellular activities. 3. Produces ribosomes in nucleoli. chromosome - Answer-a single molecule of DNA associated with several proteins, contains thousands of hereditary units called genes transmembrane proteins - Answer-an integral protein, which means that they span the entire lipid bilayer and protrude into both the cytosol and extracellular fluid; act as channels or transporters increase the permeability of the membrane enzyme - Answer-catalyzes reaction inside or outside cell concentration gradient - Answer-is a difference in the concentration of a chemical from one place to another, such as from the in