more past paper Flashcards
explain why fetal haemoglobin has curve to left
- higher affinity for oxygen
- load oxygen at lower partial pressure oxygen
- placenta has low partial pressure
lack of NAD
lack of NAD
what forms a photosystem ?
pigments
what do accessory pigments do
absorb light and pass energy to reaction centers
what are the holes called on insect body
spiracle
define limiting factor
factor which determines rate when in short supply
briefly describe collagen
- 3 polypeptide chains
- chains twist
- h bonds between chains
- cross links formed
difference between cyclic and non cyclic photophos
cyclic only produces ATP, non also produces NADPH and oxygen
where does chemiosmosis occur in photo synth ?
in the ETC,
protons move into thylakoid from stroma
what do primary pigments do ?
pass electrons to ETC
where is cardiovascular center ?
medulla oblongata
what causes type 1 diabetes ?
beta cells not functioning so unable to produce insulin
TB infective agent
myco bacteria
define biodiversity
abundance of species and variety of alleles
define phylogeny and how is it related to classification
- evolutionary relationship between groups of organisms
- basis of classification
- shows common ancestors
