Characteristics of Life
How many characteristics of life are there?
7
What is an atomic number?
Number of protons
what is the range of numbers on the pH scale?
0-14
what are the three categories of polysaccharides?
starch, glycogen, cellulose
what is the monomer of carbohydrates?
single sugar molecules called monosaccharides
What are the characteristics of life?
cells, metabolism, evolution, homeostasis, reaction to environment, growth
True or false: the number of protons is equal to the number of electrons in a nuetral atom
true
what number on the pH scale represents a neutral state?
7
what are the 4 biological macromolecules?
carbohydrates, lipids, proteins, nucleic acids
what is a disaccharide?
two sugar molecules bonded together
Define homeostasis.
maintaining a stable internal environment
how do you find the number of neutrons in an atom?
mass - the atomic number
what molecule is a 7 on the pH scale?
water
what are considered polymer examples?
carbohydrates, nucleic acids, proteins
what is the function of cellulose?
structural support for plant walls
is a virus a living thing?
no.
how many electrons do the 2nd and 3rd outer ring of an atom hold?
8 electrons
what are the 3 categories of the pH scale?
neutral, acidic, basic
What is a monomer?
a small molecule
what is the function of glycogen?
store carbohydrates for later use, only in animals
who came up with the theory of natural selection?
Charles Darwin
what is hydrogen bonding?
when the negative and positive parts of a hydrogen atoms attract and bond hydrogen atom together
What is a buffer?
A buffer is a substance that keeps pH within normal limits
why are the four macromolecules considered organic?
because they have a carbon backbone
what is the relationship between polysaccharides and monosaccharides?
polysaccharides are made up of patterns of monosaccharides