Flashcards in Chapter 4 Vocab Words - Part 2 Deck (24):
A digestive organelle in eukaryotic cells, contains hydrolytic enzymes that digest the cell's food and wastes.
The thinnest of the 3 main kinds of protein fibers making up the cytoskeleton of a eukaryotic cell; a solid, helical rod composed of the globular protein actin.
A photograph taken through a microscope.
The thickest of the 3 main kinds of fibers making up the cytoskeleton of a eukaryotic cell; a straight, hollow tube made of globular proteins called tubulins. Microtubules form the basis of the structure and movement of cilia and flagella.
The fluid contained within the inner membrane of a mitochondrion.
An organelle in eukaryotic cells where cellular respiration occurs. Enclosed by 2 concentric membranes, it is where most of the cell's ATP is made.
A double membrane, perforated with pores, which encloses the nucleus and separates it from the rest of the eukaryotic cell.
A dense region of DNA in a prokaryotic cell.
A structure within the nucleus of a eukaryotic cell where ribosomal RNA is made and assembled with proteins imported from the cytoplasm to make ribosomal subunits.
The genetic control center of a eukaryotic cell.
A membrane-enclosed structure with a specialized function within a cell.
An organelle containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide.
The membrane that sets a cell off from its surroundings and acts as a selective barrier to the passage of ions and molecules into and out of the cell; consists of a phospholipid bilayer in which are embedded molecules of protein and cholesterol.
An open channel in a plant cell wall through which strands of cytoplasm connect from adjacent cells.
A type of cell lacking a membrane-enclosed nucleus and other membrane-enclosed organelles; found only in the domains Bacteria and Archaea.
A cell structure consisting of RNA and protein organized into 2 subunits and functioning as the site of protein synthesis in the cytoplasm. The ribosomal subunits are constructed in the nucleolus.
A network of interconnected membranous sacs in a eukaryotic cell's cytoplasm. Rough ER membranes are studded with ribosomes that make membrane proteins and secretory proteins.
A microscope that uses an electron beam to study the surface architecture of a cell or other specimen.
Scanning Electron Microscope (SEM)
The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water; Sugars are made in the stroma by the enzymes of the Calvin cycle.
One of a number of disk-shaped membranous sacs inside a chloroplast. Thylakoid membranes contain chlorophyll and the enzymes of the light reactions of photosynthesis. A stack of thylakoids is called a granum.
A microscope that uses an electron beam to study the internal structure of thinly sectioned specimens.
Transmission Electron Microscope (TEM)
A tiny membranous sac in the cell's cytoplasm carrying molecules produced by the cell. The vesicle buds from the endoplasmic reticulum or Golgi and eventually fuses with another membranous organelle or the plasma membrane, releasing its contents.
A membrane-enclosed sac that is part of the endo-membrane system of a eukaryotic cell, having diverse functions.