2.1 Flashcards
Name the parts of an animal cell.
Cell membrane Cytoplasm Nucleus Mitochondria Ribosomes
What is the function of cell membrane?
Controls the molecules that can enter and leave the cell
What is the function of a nucleus?
Contains DNA which controls the activities of the cell
What is the function of cytoplasm?
Contains enzymes to carry out reactions in the cell
What do mitochondria do?
Release energy by respiration
What do ribosomes do?
Carry out protein synthesis to make proteins
What are the parts of a plant cell?
Cell membrane Cytoplasm Nucleus Ribosomes Mitochondria
Cell wall
Vacuole
Chloroplasts
What do plant cells do to aid photosynthesis?
Trap light
What do chloroplasts do?
Absorb light energy to make food (photosynthesis)
What is the cell wall made of? What does it do?
Cellulose
Strengthens the cell
Why does a plant need a cell wall and an animal cell doesn’t?
A plant doesn’t have a skeleton
What in is the permanent vacuole?
Cell sap
What cell structure is an algae structure the same as?
Plant cell
What are flagella for?
Aids movement.
How does flagella help algae cells?
Helps it swim towards the light
What are all living thins made up of?
Cells
What is special about yeast and bacterial cells?
Single-celled organisms
What are the parts of a yeast cell?
Nucleus
Cell membrane
Cell wall
Cytoplasm
What are the parts of a bacteria cell?
Cell membrane
Cell wall
Cytoplasm
Strand of DNA
What doesn’t a bacteria cell not have?
Nucleus
What is meant by a specialised cell?
They have special features so they can carry out their job
What is the function of a sperm cell?
Swim to egg
What special features does a sperm cell have? What do they do?
Tail- swimming
Streamlined - helps movement
Mitochondria- respire and release energy
Enzymes- digest egg wall
What is the function of a red blood cell?
Carry oxygen from lungs to cells
What special features does a red blood cell have? What do they do?
Haemoglobin- sticks to oxygen
Large S.A- increase oxygen diffusion
No Nucleus-extra room for haemoglobin
What is the function of a nerve cell?
Send electrical impulses around body
What is the function of a palisade cell?
Absorb light for photosynthesis
What is the main feature of a palisade cell? What’s it for?
Chloroplasts- absorb light
What is the function of a root-hair cell?
Absorb water and minerals from the soil .
What features does a root-hair cell have?
Long hair-increase S.A
No chloroplasts
What does diffusion mean?
Movements of molecules from a high concentration to a low concentration.
What do cells need to be able to release energy in respiration?
Oxygen
How does oxygen enter cells
By diffusion
When is diffusion fastest?
When there’s a bigger concentration difference
What must dissolved substances pass through to enter cells?
Cell membrane
What does net movement mean?
The total movement of a substance
