B1-Cell Biology Flashcards
(15 cards)
What are the two types of microscope?
Light microscopes and electron microscopes
Write down the formula used to
calculate the magnification of an object
Magnification = image size ÷ actual size
Name the part of the cell where
protein synthesis occurs
Ribosomes
Name the part of the cell where
aerobic respiration takes place
Mitochondria
Name the part of the cell which
absorbs light energy for
photosynthesis
Chloroplasts
Why can ribosomes not be seen
under the microscope?
They are too small
What term is used to describe the movement of particles from a high concentration to a low concentration?
Diffusion
What term is used to describe the movement of water particles from a high
concentration to a low concentration through a semi-permiable membrane?
Osmosis
What term is used to describe the movement of particles from a low concentration to a high concentration using energy?
Active transport
What will happen to the mass and
length of a piece of potato when it is
placed into a highly diluted sugar
solution?
The mass and length will increase
Why do root hair cells no contain any chloroplasts?
There is no light to photosynthesise under the soil
Explain how the sperm is adapted to its function
Has flagella – to swim
Many mitochondria – energy for
movement
Enzymes in head – break down egg
cells jelly coating
What are stem cells?
Cells that have not become
specialised yet
Name two places where human stem cells are found
Embryonic fluid and bone marrow
Name the place where plant stem cells are found
Meristem
