F212 - Biology Flashcards
(16 cards)
What is neutralisation in terms of antibodies?
Where antibodies cover the binding sites of the pathogen
Why are pregnant women more important to immunise than most people?
As the baby has an undeveloped immune system
List three roles of lipids in the human body
To form phospholipid bilayers
To provide insulation
Waterproofing
State how you carry out an emulsion test (for lipids)
Add ethanol to sample
Shake
Add to water
Suggest two reasons why the number of species identified is lower than the real number of species
Many species are undiscovered
Microscopic species are hard to see
Name 2 aims of CITES
Stop all trade of endangered species
To allow trade of only less endangered animals and plants to those with permits
What are the only things that can be denatured?
Enzymes
The name for variation that covers a range of values, rather than discrete categories
Continuous variation
What is the system of naming organisms that uses two scientific (Latin) names for species
Binomial
What type of structure is a sequence of amino acids
Primary structure
How are phagocytes able to pass from the blood into the tissue fluid
Histamine that is produced makes the capillary walls leaky
So can squeeze out through pores
Why is a low Simpsons index of biodiversity bad?
As the habitat is dominated by only a few species
So change in one species is likely to affect the whole habitat
So the habitat is unstable
How many stands does RNA have?
1
Define the term immune response
Reaction to an antigen
Involving lymphocytes / production of antibodies
Why is complementary base pairing important in DNA replication
Reduces possibility of mutations
DNA can be replicated without errors
Allows the reformation of hydrogen bonds
Name 3 criteria that the EIA look for
What damage the structure would do
The size of the development
Potential strategies to minimise the impact it has
