Flashcards in bio Deck (44):
what does the nucleus do
controls the cells activity
what does the cell membrane do
controls what comes in and out of the cell
what does the cytoplasm do
a substance which chemical reactions take place
what does the cell wall do
supports the cell
what does the vacuole do
stores water and chemicals, supports the cell
what does the chloroplast do
required for photosynthesis
what is yeast
yeast is a single celled fungus
what can we use yeast for
for brewing ad baking
what 3 structures do a animal cell have
what 3 structures do a plant cell have but an animal cell doesn’t
what is an antibiotic
an antibiotic is a chemical that stops the growth of a microorganism
what can you make using yeast
what are cells
building blocks of life
how do you make yogurt
you add bacterix go milk
3 reasons why the milk is heated up in the yogurt making process
to remove air
to change the milks proteins
to kill bacteria
what is the difference between biological and non-biological detergents
biological detergents contain enzymes and non-biological don’t
what are the advantages and disadvantages or biological detergents.
.clean better. .allergic reactions
.low temperature .high cost of product
.save energy and money. .enzymes may digest natural fibres such e. as wool and silk
what is an antibiotic
an antibiotic is a chemical that prevents the growth of an micr organism
what are antibiotics used for
to fight bacterial infections.
each antibiotic is affective against different types of bacteria
who discovered penicillin.
what is penicillin
penicillin is a natural chemical produced by fungus which is toxic to some bacteria but not toxic to humans
bacteria which are sensitive to an antibiotic are
killed by the presence of that antibiotic and will show no growth near that antibiotic.
bacteria which are resistant to an antibiotic are
not affected by the presence of that antibiotic and will still grow near that antibiotic.
how to anti-fungus creams work
They work by killing fungal cells and preventing further growth.
how does anti bacterial cleaners work
They remove dirt and kill bacteria.
They can also prevent bacteria from growing on the surface for some time after use.
how are new cells produced and what is the process called
by cell devision
Mitosis is when the cell divides to form 2 identical daughter cells.
what are chromosomes
Chromosomes in the nucleus carry the genetic information of a cell.
Mitosis makes new cells for
growth and repare
bacteria need good conditions to grow. what are these conditions
source of nutrients/energy
what is the function of DNA
to pass on inherited characteristics from parents to offspring
where is the DNA information stored and how many of them are there
what are chromosomes made up of
which give you particular characteristics
Chromosomes are made of tightly coiled DNA.
what does DNA give instructions to
Proteins are used for cell parts, enzymes, hormones, antibodies, etc.
what is DNA profiling
DNA profiling is a technique used by forensic scientists to assist in the identification of individuals using their DNA.
what can DNA profiling be used for
•in forensics (to identify criminals)
•in paternity testing (test to find out the father of a child)
•to assess future health risks
what can you got DNA cells from
do identical twins have the same DNA
what is forensics
identifying a dead body or DNA samples found at a crime scene.
Can identify a dead body.Can identify suspects at a crime scene. Can reduce wrongful convictions.
On it’s own it’s inconclusive – DNA evidence could be planted at a crime scene or been there prior to criminal activity. Samples are easily contaminated.
what is Paternity testing
identifying the biological father.
Identify the biological father. Can be used in child support cases.
Expensive. Identify the biological father (could cause problems).
what is Archaeology
identifying human remains.
Could identify the ethnicity of the individual. Could identify if remains found together were related.
Difficult to get a suitable sample, i.e. tissue/cells to analyse.
what is Assessing future health risks
identifying potential for developing different genetically inherited illnesses.
Able to alter lifestyle accordingly. Seek correct medical treatment sooner. Understand impact on potential offspring.
Information could be shared – violation of privacy. Information could be used by companies to deny a product e.g. bank loan, health insurance.
what is Photosynthesis
Photosynthesis is the process by which green plants make high energy foods (sugar and starch).
carbon dioxide + water ————oxygen + sugar