Biology Test Flashcards
How would you look at a prepared slide under the microscope?
1) Put slide on stage under clips
2) Using smallest objective lens, and looking at the side rack your slide as close as you can to the objective lens
3) Look down ocular lens and use coarse focusing knob first
4) Then use fine focusing knob to make image look good and sharp
5) Repeat using medium power
Repeat using high power
What is the relationship between magnification and the Field of View?
As the magnification increases, the field of view decreases.
As the magnification decreases, the field of view increases.
How many millimetres are in a micrometer?
1mm = 1000Mm
Write an equation that shows the action of yeast on glucose.
Yeast
Water + Glucose ——–> Ethanol + CO2
What kingdom does yeast belong to?
Fungi kingdom
How does yeast reproduce?
By budding.
Why do bakers use yeast to make bread?
To make the bread rise. Yeast produces CO2 and CO2 is a gas which makes the bread rise.
Why do Brewers use yeast to make beer?
To make the alcohol. The yeast breaks down the glucose (sugar) to make alcohol.
Label 12 different parts of a plant cell.
Mitochondria, chloroplast, LARGE vacuole, nucleus , cell wall, cell membrane, nuclear membrane, smooth endoplasmic reticulum, rough endoplasmic reticulum, gogli complex, ribosomes, cytoplasm.
Name 3 parts of a plant cell which are not in an animal cell.
Chloroplasts, LARGE vacuole, cell wall.
What do the mitochondria do?
Produces energy for the cell.
What do the chloroplasts do?
Site of photosynthesis.
What do the endoplasmic reticulum do?
Transports or moves things around the cell.
What do the centrioles do?
Controls the movement of chromosomes during mitosis.
What do ribosomes do?
Where the protein of the cell is made.
What does the nucleus do?
Holds the DNA of the cell and controls the cell.
What is the name of the group of animals that are made up of only one cell?
Unicellular organisms.
What is mitosis?
A type of cell division that produces 2 daughter cells identical to the parent cell.
Name and describe the 5 stages of mitosis.
Interface - normal cell function
Prophase - nuclear membrane disappears, chromosomes do spiral dance thing so become visible, chromosomes make a copy of themselves
Metaphase - chromosome pairs line up in middle of cell, one on each side of middle
Anaphase - chromosome pairs are pulled apart from each other
Telophase - chromosomes unravel and become invisible, neclear membrane reforms, cell splits in half
What is a cell organelle?
A part of a cell that has a specific job.
Label 11 different parts of an animal cell.
Ribosomes, SMALL vacuoles, nucleus, centrioles, nuclear membrane, smooth endoplasmic reticulum, rough endoplasmic reticulum, cytoplasm, gogli complex, mitochondria, cell membrane.
Define the term stem cell.
An unspecialised cell which can change into different types of cells.
Name 3 places you will find stem cells.
Bone marrow, umbilical cord or human embryo.
Describe 2 ways stem cells have helped human.
1) Can be used for diabetic patients to make insulin producing cells
2) Can be used to grow new organs for people who’s organs are damaged or aren’t working properly.
