Cells and Organisms Flashcards
How do you calculate total magnification
Eyepiece lens x objective lens
Define the term resolution
Resolution is the ability to distinguish between two separate points in an image
What is the role of the nucleus
Contains DNA in the form of chromosomes. Contains the genetic code.
What is the role cytoplasm in a cell
This is where chemcial reactions take place
What is the function of the cell membrane
Controls what enters and leaves the cells.
What is function of the mitochondria is cells
This is the site of respiration.
Glucose + Oxyen –> Carbon dioxide + water vapour + ATP energy
Define the word ‘magnification’
Magnification is how much bigger an image is compared to it’s actual size.
Can be calculated by using the IAM triange.
The functions of a cellulose cell wall.
This is outer layer of plant cells. It is made of cellulose. It gives the plant strength and support.
Why are ribosomes needed in a cell?
Ribosomes are the site (location) where proteins are made.
What is the function of chloroplasts in plant cells?
Chloroplasts contain a green chemcial called chlorophyll. It traps sunlight energy which is needed for photosynthesis.
Difine the word ‘ribosomes’
a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells.
What is ‘cytoplasm’
The material within a living cell, excluding the nucleus.
What is the function of a ‘nucleus’
it stores the cell’s hereditary material and activates the plants growth
What is the ‘vacuole’ of a plant cell
A vacuole is usually found in all plant and fungal cells, as well as some cells of protists, animals, and bacteria.
What is the function of the ‘cell wall’
To protect the whole of the plant cell
