SB1 Flashcards
How many sub-cellular structures does a plant cell have
8
How many sub-cellular structures does a animal cell have
5
How many sub-cellular structures does a bacteria cell have
5
What does the nucleus do
Contains DNA that controls the cell
What does cytoplasm do
It’s where chemical reactions happen
What does the cell membrane do
Holds the cell together and controls what goes in and out
What does mitochondria do
Where respiration happens
Transfers energy that the cell needs to work
What doe ribosomes do
Where protein synthesis happens
What does the cell wall do
Supports and strengthens cell
What does the vacuole do
Contains cell sap
Holds nutrients and water
What does chloroplast do
Where photosynthesis happens
Contains chlorophyll
What are plasmid DNA
Small loops of extra DNA
What does chromosomal DNA do
Controls cells activities
What does the flagellum do
Helps cell to move
What is a haploid cell
23 chromosomes
What is a diploid cell
46 chromosomes
Are these haploid or diploid:
- bacteria
- animal
- plant
- egg
- sperm
Neither Diploid Diploid Haploid Haploid
Give and explain the role of a specialised cell
Not egg or sperm
Ciliated epithelial cell
Are to move substances
The cilia on top of the cell allow it to do this
What is the equation for magnification
Image size
divided by
Actual size
I
Am
What is the difference between a light and electron microscope
ELECTRON
higher magnification
Higher resolution
Fires electrons at object
LIGHT
Uses light to see object
Define resolution
The smallest distance that two points can be seen as two points
What are the units of measure
Millimeter.
Mm
Micrometer Y(upside down)m
Nanometer
Nm
Picometer
Pm
What enzyme breaks down protein and into what
Protease into amino acids
What enzyme breaks down fats and into what
Lipases into fatty acids
What enzyme breaks down carbohydrates and into what
Amylase into maltose
What is the test for carbohydrates
And how does it work
Iodine
Add iodine to sample
Starch ✅ goes from orange/brown to black
Starch ❌ stays orange/brown
What is the test for sugar
And how does it work
Benedicts
Add benedict solution (blue) to sample
Place in water bath
Sugar✅ blue to brick red
Blue to green to yellow to orange to brick red
Sugar❌ stays blue
What is the test for fats
And how does it work
Ethanol
Put ethanol in sample ,shake , until dissolved then pour in water
Lipids✅they will precipitate our of the liquid as show a milky solution
Lipids❌ no change
What is the test for proteins
And how does it work
Biuret Test
Add (blue) solution to sample
Protein✅ Turn purple
Protein❌ stay blue
Define diffusion
Movement of particles from a high to low concentration
Define osmosis
Movement of water from a high to low concentration through a semi permeable membrane
Define active transport
Movement of particles low to high concentration through a membrane
