Which 3 factors can influence decisions about science?
What are the 2 types of cell?
Prokaryotic ********* are prokaryotic cells
Which of the cells prokaryotic and eukaryotic contain cells?
Which type of cells is more complex, eukaryote or prokaryote?
Which type of cells are animal and plant cells?
Give an example of a prokaryote organism
What are organelles?
-Parts of cells, each one has a specific function
Name three organelles/structure found in plant cells not found in animal cells
Describe the cell wall
-Made of cellulose, has holes for exchanging substances with adjacent cells
What is the vacuole a compartment for?
What are most organelles surrounded by?
Where can a cell surface membrane be found?
-Animal cells, plant cells, prokaryotic cells
What is the cell surface membrane made of?
-Lipids and proteins
What does the cell surface membrane do?
-Regulates movement of substances into and out of the cell
What do the cell surfaces often contain on the surface? What do they do?
-Respond to chemicals like hormones
How is the cell wall compared to the cell membrane?
Which types of cells does the cell wall surround?
What is the cell wall made of?
What does the cell wall do?
-Supports plant cells
How many membranes does the nuclear envelope have?
-1 Double membrane
What does the nucleus contain?
What is chromatin made of?
-Proteins and DNA (DNA controls the cells activities)
What sort of substances need to move between the nucleus and the cytoplasm? How do they do this?
What is the function of the nucleolus?
Describe the lysosome? (3 marks)
-Surrounded by membrane
-No clear internal structure
What does the lysosome do?
-Contains digestive enzymes, kept separate from the cytoplasm by a surrounding membrane
-Digest invading cells or break down worn out components of the cell
What does a ribosome look like?
Give 2 locations a ribosome can have in the cell?
-Rough endoplasmic reticulum
What is the function of the ribosomes?
-Site where proteins are made
What does RER stand for?
-Rough Endoplasmic Reticulum
What is the core of RER? What are attached?
What is the function of the RER?
-Folds and processes proteins that have been made at the ribosomes
How does the SER differ from the RER? What is its function?
-Synthesise and process lipids
What is a vesicle?
-Small fluid-filled sac in the cytoplasm, surrounded by a membrane
What is the role of a vesicle?
-Transport substances in and out of the cell (via the plasma membrane) and between organelles.
For packaging in vesicles, give examples…