Flashcards in Cell Organelles Deck (23):
Cells that contain a nuclei
Cells that do not contain a nuclei
Portion of the cell outside the nucleus
-allows for diffusion of nutrients and wastes
What is the nuclear envelope?
-composed of two membranes
- surrounds the nucleus
-allows material to move in and out of the nucleus
What is chromatin?
-consists of DNA bound to protein
-found in the nucleus
-spread around the nucleus but condenses to form chromosomes when the cell splits
-long strands of DNA float within the nucleus
What are chromosomes?
-distinct threadlike structures contain genetic information passed through the generations
What is the nucleolus?
-assembly of ribosomes begin
What are ribosomes?
-proteins are assembled on ribosomes
-small pieces of RNA and protein found throughout the cytoplasm
-use copy of DNA to build protein
What is the endoplasmic reticulum?
-site where lipid componentes of the cell membrane are assembled along with other proteins exported from the cell
-rough ER involved in the synthesis of proteins
-when proteins are ready for cellular export they are built on the rough ER
-smooth ER has enzymes which preform specialized tasks
What is the Golgi Apparatus?
-job is to sort, modify and package proteins and other materials from the endoplasmic reticulum for storage or secretion
What are lysosomes?
-small organelles filled with enzymes
-digestion, breakdown of lipids, carbohydrates and proteins
-responsible for breaking down organelles
-"clean up crew"
What is the vacuole?
What is the mitochondria?
Organelles that convert chemical energy into compounds more convenient for the cell
-part of cellular respiration
What are chloroplasts?
Organelles that capture energy from sunlight and convert it into chemical energy through photosynthesis
What is the cytoskeleton?
-found in eukaryotic cells
-network of protein filaments that help the cell maintain shape
-involved in movement
What are centrioles?
-located near the nucleus and help organize cell division
What is the cell membrane?
-cell surrounded by a thin and flexible barrier
-sometimes called the plasma membrane
-regulates what enters and leaves the cell and provides support and protection
-cannot control gases or water
What is the cell wall?
-a strong supporting layer around the membrane
What is the cytoskeleton?
Connects, provides support and helps transport organelles
What is the nucleus?
-control centre for the cell
What is DNA
Contains plans for construction of most of the chemicals
What is the flagellum?
A whip-like tail that helps the cell move