random Flashcards
which part of the blood helps it to clot if the skin is cut
platelets
your stomach contains which type of acid
hydrochloridric
how are infectious diseases transmitted
air particles
contaminated food and water
surfaces
which one of these is not likely to be a pathogen
mosquito
which of these would not be a feature of a good vaccine
unlikely to produce her immunity
antibodies have to be _______to kill pathogens
specific
why is the term used to describe you not being able to become ill with a particular pathogen
immune
any foreign molecule that is recognise by and able to elicit a specific response from a lymph is called an…
antigen
any foreign molecule that is recognise by and able to elicit a specific response from a lymph is called an…
antigen
A Y shaped protein molecule which recognises specific foreign antigens
antibody
how does a vaccination work
infection someone with weakened or inactive pathogens
primary response
when a person becomes infected with the disease for the first time and responds by producing antibodies
do antibiotics work on viruses
true
what is a “chromosome”
line strand of DNA coiled up into a structure
what shape is dna
double helix
how many chromosome does a human cell usually contain
46
dna is found within all the cells of humans except
red blood cells
there are two parents and genetic information is passed on from both of these to the offspring
sexual reproduction
how many daughter cells are formed during mitosis
2 identical
mitosis is important for
growth, repair and asexual reproduction
during which phase of mitosis does dna replicate
interphase
uncontrollable or runaway cell division results in
cancer
which phase of mitosis do the chromosomes condense and become visible
prophase
during cytokines the cell
divides into two daughter cells
order of mitosis is
interphase
prophase
metaphase
anaphase
telophase + cytokinesis
mitosis results in
four haploid daughter cells
evolution
gradual changing of a species over the time
which individuals are most likely to survive to reproduce
those that are well suited to their environment
what is adaptation
a feature of an organism that allows it to survive in its environment
why are fossils used to prove evolution happened
they provide evidence of different species for a long time ago
what is genetic mutation
a random change in organisms dna
why is survival of the fittest associated with natural selection
within a population individuals who have a selective advantage will survive while others dies out
some genes give characteristics that mean an organism is ———- suited to living in an environment
better r
genetic variation is controlled by
the genes inherited from your parents
the part of an enzyme that’s the substrate interacts with is called the
active site
enzymes are effected by
temperature
concentration
ph
What’s a independent variable
A variable that’s is BEING CHANGED
Control variable
Must kept the same in order to make results affected
Dependant variable
Variable TESTED/MESURED during experiment
