Chapter 2 Flashcards
What happens in a nucleotide sequences
Genetic info is encoded
What do genes do aka gene expression
Program the cells protein production by being transcribed into MRNA
Genomics
Large scale analysis of DNA
Systems biology is mainly an attempt to
understand the behavior of entire biological systems by studying interactions among its component parts.
A controlled experiment……
Tests experimental and control groups in parallel
Which sentence best describes the logic of scientific inquiry?
If my prediction turns out to be correct, my hypothesis is supported.
What are the 2 ways matter consists
In the pure form of chemical elements and chemical compounds
Element vs. Compound
Elements cannot be chemically broken down any further.
What makes up 96% of living matter
Oxygen, hydrogen, carbon and nitrogen
What determines an elements properties
It’s atomic structure
Atom
Smallest unit of an element
What is an atom comprised of
Nucleus: holds protons and neutrons
Protons: positive charge; determines element
Neutrons: no charge; determine isotope
Electrons: outside of nucleus on orbital rings; negative charge;determine chemical behavior
What does an electrically neutral atom have
Equal numbers of electrons and protons
What determines the atom is number
Protons
Atomic mass is the_____ and is measured in _______
Mass number, daltons
What makes an isotope unstable
The nucleus has an uneven ratio of protons to neutrons
What do unstable isotopes do
Give off particles and energy as radioactivity
Isotopes
When different molecules or elements all have the same number of protons but different number of neutrons
Electrons distribution determines the…..
Chemical behavior of an atom
Valence shell
An atom that has an incomplete outer shell that is reactive
Atomic number=
Number of protons
Number of protons=
Number of electrons (in a stable element)
Go over how to draw a Bohr model
Look at yellow flash card
The formation and function of molecules and ionic compounds depend on
Chemical bonding between atoms
