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 outsid
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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
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