B1 Flashcards
Plant and animal cells are both what type of cell ?
Eukaryotes
What type of cell is a bacteria cell
Prokaryotes
Which organelle is the site of aerobic respiration
Mitochondria
What does a ribosome produce/synthesise
Protein
Which organelle controls the movement of substances in and out of the cell
Cell membrane
What 3 organelles can you find in a plant cell but not in an animal cell
Cell wall, chloroplasts, vacuole
Where is the genetic material found in an animal cell
Nucleus
What are the circular rings of DNA called in bacteria
Plasmids
How many chromosomes are there in a human body cell
46
How many chromosomes are there in a human sex cell (gamete)
23
What are the two advantages of an electron microscope over a light microscope
Higher magnification higher resolution
What happens to chromosomes before mitosis
They duplicate
What is a stem cell
An undifferentiated cell
What diseases can stem cells be used to treat
Diabetes, paralysis, stroke, heart disease
Name the part of a plant used for stem cells
Meristem
How are root hair cells specialised
They have a larger surface area
What transport is the net movement of particles from a high concentration to a low concentration
Diffusion
What three things affect the rate of diffusion
Temperature, concentration gradient and surface area
Osmosis
The movement of water from a less concentrated solution to a more concentrated one through a semipermeable membrane
Active transport
The movement of molecules across the membrane from a low concentration to higher concentration using energy from respiration
