BIO 120 LECTURE 6 Flashcards
what are the 3 different forms of energy?
Kinetic energy
potential energy
chemical energy
KINETIC ENERGY?
Energy possessed by an object because of motion.
ex:waterfall, falling rock
POTENTIAL ENERGY?
Form of stored energy, the capacity to perform work
ex-water behind dam
fossil fuels
name a fossil fuel in form of hydrocarbon?
gasoline
name a fossil fuel in form of carbon?
coal
when is the chemical energy stored ins fossil fuels released?
when they are burned into combustion engine.
all chemical molecules store________.
energy
why do different molecules have various potential energy?
due to the arrangement of their atoms
what is thermodynamics or thermodynamic system?
a branch of physics concerning the study of energy, conversion of energy between diff forms and the ability of energy to do work.
FIRST LAW OF THERMODYNAMICS?
LAW OF ENERGY CONSERVATION
WHAT DO U MEAN BY LAW OF ENERGY OF CONSERVATION?
The total amount of energy in the universe remains constant
energy can be changed one ______ to another?
form
SECOND LAW OF THERMODYNAMICS?
LAW OF ENERGY CONVERSIONS
THE LAW OF ENERGY CONVERSIONS
Reducing the order of universe, increasing its entropy
what do u mean by RANDOMNESS in thermodynamic?
amount of disorder in a system.
what is the spontaneous direction of energy flow acc to 2 law of thermodynamics?
rich energy to less organized (less energy)
the amount of “lower quality” energy in the universe is ____________?
increasing
some energy is always lost as ________?
HEAT
What is imp for energy conversions?
Energy input
what happens to a organized system without energy input?
it gets disorganized
CELLULAR METABOLISM?
Sum of chemical activities in a living cell.
_______ increases rate of chemical reaction without the need For an increase in ________.
ENZYMES, TEMPRATURE
enzymes are a group of _________.
catalysts
In a cell, what group of enzymes catalyzes the removal of a phosphate group from a range of molecules.
PHOSPHATASES