Flashcards in Test Questions Deck (47)
What are the main parts of animal cells?
Which parts of a cell are found in plant cells but not animal cells?
Cell wall, chloroplasts, permanent vacuole
Name the parts of bacterial cells?
Cytoplasm, ribosomes, chromosomal DNA, cell membrane, cell wall
What is the function of a nucleus of a cell?
To control the activities of a cell to store the genetic information
If a cell is adapted to do a specialist function, what is it said to be?
What is the function of a cytoplasm?
To provide a place for most of the chemical reactions to take place
What is the function of the cell membrane?
To control the passage of substance into and out of the cell
What is the function of the mitochondria?
To provide a place for most of the energy in respiration to be released.
Where does protein synthesis in the cell happen?
Which feature do plant cells have which help them to strengthen and support their cells?
They have cell walls made of cellulose
What is the function of the chloroplasts?
They absorb light energy to carry out photosynthesis and make glucose
What is found inside the permanent vacuole of plant cells?
What is important about the genetic information in a bacterial cell?
It is not inside a distinct nucleus
Name two features of a sperm cell
Tail to allow it to swim to the egg
Lots of mitochondria meaning lots of energy
Enzymes in the head
Why do ciliated cells and sperm cells have lots of mitochondria?
They move a to therefore they require lots of energy.
How do dissolved substances move in and out of cells?
Diffusion or active transport
What is the definition of diffusion?
The movement of particles from an area of high concentration to an area of low concentration through a semi-permeable membrane.
Diffusion of water molecules is known as what?
Define active transport.
The movement of particles from an area of low concentration to an area of high concentration.
What is needed for active transport to take place?
Explain why a piece of potato will decrease in mass when placed in a high concentration solution of sucrose?
Because water will move out of the potato through osmosis.
What do catalysts do?
They increase the rate of chemical reactions without being used up.
What are biological catalysts called?
What type of molecule are enzymes made from?
What property of enzymes is vital for its function?
The shape of the enzyme molecule
What do high temperatures do to the enzyme?
Change the shape of the enzyme molecule - the enzyme is denatured
What other factor is important for enzymes to function correctly?
What does denatured mean?
When the active site of an enzyme changes shape.
What does amylase do?
It catalyses the breakdown of starch into sugars in the mouth and small intestine.