UMKC BIO 108 Unit 1 questions with
100% correct answers already passed
All organisms are composed of what? - CORRECT ANSWER ✔✔Matter
Matter is - CORRECT ANSWER ✔✔anything that takes up space and has mass
What is an element? - CORRECT ANSWER ✔✔substance that cannot be broken down to other
substances by chemical reactions
what is a compound? - CORRECT ANSWER ✔✔substance consisting of 2 or more elements
How many elements are essential to life? - CORRECT ANSWER ✔✔About 25 of the 92
What 4 elements make up 96% of living matter? - CORRECT ANSWER ✔✔carbon, hydrogen,
oxygen, nitrogen (CHON)
What 4 elements make up the remaining 4% of living matter? - CORRECT ANSWER ✔✔calcium,
phosphorus, potassium, sulfer (CaPKS)
What is an atom? - CORRECT ANSWER ✔✔smallest unit of matter that still retains the
properties of an element
What are the 3 subatomic particles? - CORRECT ANSWER ✔✔protons+, neutrons, electrons-
,What 2 subatomic particles are found in the nucleus? - CORRECT ANSWER ✔✔Protons+,
neutrons
What is the mass of protons and neutrons? - CORRECT ANSWER ✔✔1 Dalton (Da)
What is an atomic number? - CORRECT ANSWER ✔✔amount of protons in an atom
What is a mass number aka atomic mass? - CORRECT ANSWER ✔✔sum of protons and neutrons
What is an isotope? - CORRECT ANSWER ✔✔atoms with a different number of neutrons
What is a radioactive isotope? - CORRECT ANSWER ✔✔nucleus of an isotope spontaneously
decays off particles and energy
What are 3 things we use radioactive isotopes for in biological research? - CORRECT ANSWER
✔✔Dating fossils, tracing atoms through metabolic processes, diagnosing medical disorders
How is energy defined? - CORRECT ANSWER ✔✔capacity to cause change by doing work
What is potential energy?** - CORRECT ANSWER ✔✔energy that matter possesses because of
its location or structure
How to electrons have potential energy? - CORRECT ANSWER ✔✔because of how they are
arranged in relation to the nucleus
What ratio of location to potential energy do electrons have?** - CORRECT ANSWER ✔✔more
distant from the nucleus the greater potential energy
, Electrons can change shells by absorbing or losing energy in what amounts? - CORRECT
ANSWER ✔✔exact amounts i.e. they can't stop in between shells
What factor determines the chemical behavior of an atom? - CORRECT ANSWER ✔✔distribution
of electrons in the outermost shell
How many electrons can be stored in the first shell? - CORRECT ANSWER ✔✔2
How many electrons can be stored in all other shells except the first? - CORRECT ANSWER ✔✔8
What are electrons on the outermost shell called? - CORRECT ANSWER ✔✔valence electrons
What is an atom with a complete valence shell? - CORRECT ANSWER ✔✔unreactive
What is an orbital? - CORRECT ANSWER ✔✔3D space where an electron can be found 90% of
the time
How many electrons can occupy an orbital? - CORRECT ANSWER ✔✔no more than 2
What forms when atoms with an incomplete valence shell share or transfer valence electrons
with other atoms? - CORRECT ANSWER ✔✔bonds
What is a covalent bond? - CORRECT ANSWER ✔✔sharing of valence electrons by 2 atoms
Do ions form from covalent or ionic bonds? - CORRECT ANSWER ✔✔ionic bonds
What is a molecule? - CORRECT ANSWER ✔✔2 or more atoms held together by covalent bonds
100% correct answers already passed
All organisms are composed of what? - CORRECT ANSWER ✔✔Matter
Matter is - CORRECT ANSWER ✔✔anything that takes up space and has mass
What is an element? - CORRECT ANSWER ✔✔substance that cannot be broken down to other
substances by chemical reactions
what is a compound? - CORRECT ANSWER ✔✔substance consisting of 2 or more elements
How many elements are essential to life? - CORRECT ANSWER ✔✔About 25 of the 92
What 4 elements make up 96% of living matter? - CORRECT ANSWER ✔✔carbon, hydrogen,
oxygen, nitrogen (CHON)
What 4 elements make up the remaining 4% of living matter? - CORRECT ANSWER ✔✔calcium,
phosphorus, potassium, sulfer (CaPKS)
What is an atom? - CORRECT ANSWER ✔✔smallest unit of matter that still retains the
properties of an element
What are the 3 subatomic particles? - CORRECT ANSWER ✔✔protons+, neutrons, electrons-
,What 2 subatomic particles are found in the nucleus? - CORRECT ANSWER ✔✔Protons+,
neutrons
What is the mass of protons and neutrons? - CORRECT ANSWER ✔✔1 Dalton (Da)
What is an atomic number? - CORRECT ANSWER ✔✔amount of protons in an atom
What is a mass number aka atomic mass? - CORRECT ANSWER ✔✔sum of protons and neutrons
What is an isotope? - CORRECT ANSWER ✔✔atoms with a different number of neutrons
What is a radioactive isotope? - CORRECT ANSWER ✔✔nucleus of an isotope spontaneously
decays off particles and energy
What are 3 things we use radioactive isotopes for in biological research? - CORRECT ANSWER
✔✔Dating fossils, tracing atoms through metabolic processes, diagnosing medical disorders
How is energy defined? - CORRECT ANSWER ✔✔capacity to cause change by doing work
What is potential energy?** - CORRECT ANSWER ✔✔energy that matter possesses because of
its location or structure
How to electrons have potential energy? - CORRECT ANSWER ✔✔because of how they are
arranged in relation to the nucleus
What ratio of location to potential energy do electrons have?** - CORRECT ANSWER ✔✔more
distant from the nucleus the greater potential energy
, Electrons can change shells by absorbing or losing energy in what amounts? - CORRECT
ANSWER ✔✔exact amounts i.e. they can't stop in between shells
What factor determines the chemical behavior of an atom? - CORRECT ANSWER ✔✔distribution
of electrons in the outermost shell
How many electrons can be stored in the first shell? - CORRECT ANSWER ✔✔2
How many electrons can be stored in all other shells except the first? - CORRECT ANSWER ✔✔8
What are electrons on the outermost shell called? - CORRECT ANSWER ✔✔valence electrons
What is an atom with a complete valence shell? - CORRECT ANSWER ✔✔unreactive
What is an orbital? - CORRECT ANSWER ✔✔3D space where an electron can be found 90% of
the time
How many electrons can occupy an orbital? - CORRECT ANSWER ✔✔no more than 2
What forms when atoms with an incomplete valence shell share or transfer valence electrons
with other atoms? - CORRECT ANSWER ✔✔bonds
What is a covalent bond? - CORRECT ANSWER ✔✔sharing of valence electrons by 2 atoms
Do ions form from covalent or ionic bonds? - CORRECT ANSWER ✔✔ionic bonds
What is a molecule? - CORRECT ANSWER ✔✔2 or more atoms held together by covalent bonds
