Biology Chapter 3, 2

Front 1

Chromatin

Back 1

Network of fibrils consisting of DNA and associated proteins observed within a nucleus that is not dividing

Front 2

Chromosome

Back 2

Rodlike structure in the nucleus seen during cell division; contains the hereditary units, or genes

Front 3

Nuclear Envelope

Back 3

Double membrane that surrounds the nucleus and is continuous with the endoplasmic reticulum

Front 4

Nuclear pore

Back 4

Opening in the Nuclear envelope that permits the passage of proteins into the nucleus and ribosomal subunits out of the nucleus

Front 5

Nucleolus

Back 5

Dark-staining, spherical body in the nucleus that produces ribosomal subunits

Front 6

Nucleoplasm

Back 6

Semifluid medium of the nucleus containing chromatin

Front 7

Endoplasmic Reticulum

Back 7

Membranous system of tubules, vesicles, and sacs in cells, sometimes having attached ribosomes. Rough ER has ribosomes; smooth ER does not

Front 8

Glycoprotein

Back 8

Protein in plasma membranes that bears a carbohydrate chain

Front 9

Golgi Apparutus

Back 9

Organelle, consisting of flattened saccules and also vesicles, that processes, packages, and distributes molecules within or from the cell

Front 10

Lysosome

Back 10

Membrane-bounded vesiscle that contains hydrolytic enzymes for digesting macromolecules

Front 11

peroxisome

Back 11

Enzyme-filled vesicle in which fatty acids and amino acids are metabolized to hydrogen peroxide that is then broken down to harmless products

Front 12

Polyribosome

Back 12

String of ribosomes simultaneously translating regions of the same mRNA strand during protein synthesis

Front 13

Secretion

Back 13

Release of a substance by exocytosis from a cell that may be a gland or part of a gland

Front 14

Vacuole

Back 14

Membrane-bounded sac that holds fluid and a variety of other substances

Front 15

Vesicle

Back 15

Small, membrane-bounded sac that stores substances within a cell