Cell Respiration –
talk about energy transformations.
the quality that
distinguishes a vital and functional being from a dead body.
This doesn’t help
– dead is deprived of life, having died, etc.
It’s almost like
circular reasoning in defining life and death, this has plagued scientists for a
long time, today we list a number of characteristics that will help us describe
life, so if we talk about a living thing,
It must grow,
Have the ability to
respond in an adaptive way to stimuli in the environment,
Bear in mind we talk about a human or an amoeba,
they both have the same kind of characteristics.
When we talk about
metabolism, this is a process that comes about because of specific interactions
b/t molecules in the environment.
– the total of all biochemical
processes that take place in a living thing, change.
This doesn’t run on with
its own momentum, it is controlled carefully by a special group of chemicals,
There are 2 subdivisions of metabolism,
about catabolic pathways where a complex organic molecule is going to be
degraded or chemically broken down into simpler subunits, but during this
process, we are going to release energy along the way, this will be used to
drive other cellular reactions.
Cell Respiration is one way that this happens:
The 6 waters is called
The C6H12O6 is also the molecular formula of sucrose and fructose,
they are isomers.
The straight chain is the aldehyde form, it is soluble and
polar but the ring structure is the most prevalent in living systems.
enough to use the molecular formula to see the difference between the sugars.
2. Anabolism – Anabolic pathways
– take these subunits, hook them
together chemically and take larger organic molecules, for bonds using
energy, energy requiring process.
Ex: photosynthesis and protein synthesis.
Cell Respiration can be described in a summary equation, the one above, for
photosynthesis the summary equation is 6CO
O yields with light
Chlorophyll, yields C
This looks like it can be reversed
but it can’t, so the evolutionary significance b/t these 2, the catabolic
pathways provide the energy to drive the anabolic pathways.
– have been around for a long time, they have been used by medical
doctors for things and they have been used for inappropriate ways, they have
been a part of weight lifting for some ppl.
We are going to spend our time talking about catabolic pathways.
– a study of how living organisms manage their energy
anything that has mass and takes up space.
usually is the ability to form work, usually it is against a force, and the force
could be gravity or friction.
As we talk about this area of energy, we want to
talk about 2 laws of Thermodynamics.
Thermo comes from Greek word