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GRCC Bi 121 Lab 1.2

GRCC BI 121 - Cell structure & mitosis Lab test 1

QuestionAnswer
Nucleus Contains nucleolus and chromatin
Chromatin Loosely coiled fibers of DNA molecules that are wrapped around proteins (histones)to form a beaded strand
Chromosome Chromatin material that is organized and compacted to form this rodlike structure.
chromatin colored substance
chromosome colored body
When are Chromosomes formed? When cell division begins.
Cell Structual & functional units of an organism
Basic living unit of an organization Cell
Cell theory All organisms are composed of one or more cells
Cells arise from pre-existing cells Cell theory
Cell Membrane Lipid Bi-layer that is the boundary between the external and internal environment and controls what goes in and out.
Selective permeable membrane Cell membrane that controls what goes in and out of the cell.
Cell membrane composed of Lipid bi-layer, proteins and some carbohydrates.
Cytoplasm Jelly like substance that suspends the organelles
Nucleoli Parts/structure of RNA; plural for nucleolus
Microvilli Protrusions outside of cell membrane that help with absorption and secretion.
Cilia Hair like structure beneath cell membrane and propel and move things along
Flagellum Is usually single strand, think sperm that helps cell move and propel.
Organelle Little organs, where each unit specializes to help a cell function.
ribosome provide structural support and ezymatic activity that links amino acids (protein synthesis), located on rough ER
Rough Endoplasmic Reticulum Located outside of nucleus and throughout cytoplasm with ribosomes attached.
Tubular transport system for molecules throughout the cell endoplasmic retitculum
Smooth endoplasmic reticulum absorbs fats from the digestive tract and are added to the protein that came from the rough ER
Golgi appartus manufacture warehouse; recieves protein and other materials from ER, packages and transports to organelles or to cell membrane.
Lysosome Garbage disposal: degradation, recycle of materials, removal of bacteria and worn cells
Peroxisome Catalyze reactions & removes hydrogen peroxide.
Mitochondria Extracts energy from CHO and forms ATP; powerhouse of the cell.
centriole tube like structures (microtubules)that form centrosome; during cell division, each tube migrates to either side of cell forming spindle fibers.
Microtubules Forms ctyoskeleton and is where organelles & chromosomes are anchored; helps move substances
Forms ctyoskeleton and is where organelles & chromosomes are anchored; helps move substances Microfilament
Created by: Wends1984
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