Finals Flashcards
What happens to the activation energy in a rxn with an enzyme?
Lowers the amount required
Cohesion definition
Water molecules stick together
pH scale, which end is basic, acidic, and neutral
Less then 7 basic 7 neutral greater then 7 acidic
Type of bond between H and O in a water molecule
Hydrogen bond
Atomic # represents what subatomic particle?
Protons
Enzymes: are they used up during a chemical rxn or are they recycled
They can be reused over and over
What happens to the shape of the enzyme usually in the presence of heat?
It denatures
Four most common elements in all living organisms
Hydrogen, oxygen, carbon, and nitrogen
In what form are carbs stored in plants and animals?
Starch
What is the cell theory?
- All living things are composed of cells.
- Cells are the basic units of structure and function in living things.
- New cells are produced from existing cells.
What makes the 20 amino acids different from each other?
The R-group
Major type of lipid that makes up cell membrane
Phospholipids
Name examples of polysaccharides
Glycogen, cellulose, and starch
Function of enzymes in a cell
Speed reactions up, build things up or break things down
Organic means the molecule contains what element?
Carbon
Diffusion is the movement of molecules from
High conc. to low conc.
Why are plants green?
Chlorophyll
Reactants for photosynthesis
6H2O 6CO2
Union of egg and sperm vocab word
Zygote
Mendel did most of his work on what organism?
Pea plant
The proteins made from the DNA is dependent on the order of
Codons
Which type of RNA carries the DNA code to the ribosomes
Messenger RNA
Source of all new alleles in a population is
Mutation
Evolution occurs in
Populations
Name of Darwins book
Origin of species
Did prokaryotes evolved before eukaryotes
True
Inferences are never used in science
False