Eukaryotic cells Flashcards
Do eukaryotic cells make up multicellular or unicellular organisms?
Mylticellular
Give 3 examples of multicellular organisms that are composed of eukaryotic cells
animals,plants,fungi
Eukaryotic cells contain membrane-bound organelles in their cytoplasm.True or false
True
what is the cytoplasm composed of
cytosol
Where do chemical reactions take place in a cell
cytoplams
what is cytosol made of?
salt,water and organic matter
What is metabolism?
The sum of all chemical reaction that take place within each cell that makes up a living organism and that produce the energy for:
-vitral processes like respiration
-anabolic reactions
-catabolic reactions
What to chemical reactions require to occur?
-enzyme
-specific conditions
What is an anabolic reaction?
Reactions that involve synthesis/building up of molecules
What is a catabolic reaction?
Reactions that involve breaking down of molecules
What organelles present in a plant cell aren’t present in an animal cell?
-large permanent vacuole(animals may have vacuoles but its small and temporary)
-cell wall
-chloroplasts
What organelles are present in an animal cell and are not present in a plant cell?
-centriole
-lysosome
-microvilli
Tell me similarities between plant cell and animal cells?
-both eukaryotic
-have cell-surface membrane
-have membrane-bound organelles
-have mitochondria
-have 80 S ribosomes,RER,SER,Golgi apparatus
-cilia
-cytoskeleton
-nucleus
-vesicles
-microtubules
What are the roles of the cell-surface membrane?
-controls the exchange of materials between the external environment and the internal cell environment
-has receptor molecules which allow the cell to respond to chemicals like hormones
-hold the cell together(less important)
What is the cell-surface membrane formed from?
phospholipid bilayer
give me a brief summary of what the phospholipid bilayer contains
-proteins that acts as carriers
-contains cholesterol that controls the fluidity of the membrane
-has phospholipids which help regulate the movement of substances in an dout of the cell
How big is the cell surface diameter
10nm
The cell-surface membrane is selectively permeable. True or false
False.It is partially permeable
What is one disadvantage of cell-surface membrane
Its fragile,if water enters by osmosis the cell will burst
What does the cell wall consist of in plants
cellulose-a complex polysaccharide
What is the role of the cell wall
-provides mechanical strength to the cell
-shapes the cell
-acts as a defense mechanism,protecting the contents of the cell from invading pathogens
Is the cell wall present in both animals and plants
no only in plants
The cell wall is freely permeable.true or false
True
What makes the cell wall rigid
The contents of the cell press against the cell wall