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MCB 3020 EXAM ONE STUDY GUIDE PART 1 QUESTIONS AND ANSWERS
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MCB 3020 EXAM ONE STUDY GUIDE PART 1 QUESTIONS AND ANSWERS
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Name: Score:43 Multiple choice questions
Term 1 of 43
List and explain the impact of microbes on the environment - disease
1) Only a small fraction of microbes cause diseases-
2) Diseases caused by microbes are called Infectious Diseases
1) replicate itself
2) source of energy
3) control flow of chemicals
4) cell membrane
5) DNA as genetic material
1) Ionic (give/accept election)
2) Covalent (shared electron)
3) Hydrogen
- hydrogen bonds are weaker, unlike the other kinds of bonds which are more
permanent.
Other forces:
1) Hydrophobic interaction (hydrophobic molecules clump together when avoiding
water, stabalizing molecule)
3) van der Waals force (interaction among big areas of molecules between positively
and negatively charged regions).
1) Can affect the climate by production/use of CO2, N2, O2, CH4
2) Participate in symbiotic relationships with other organisms
3) primary producers -> can convert N2 gas into form we can absorb
(first organisms were thought to be RNA molecules- all you need are enzymes)
,Term 2 of 43
spontaneous reaction
a reaction that does not favor the formation of products at the specified conditions -
needs outside energy
A chemical reaction that breaks apart a larger molecule by adding a molecule of water
A reaction that will proceed without any outside energy
a chemical reaction in which a water molecule is added to break a covalent bond
Term 3 of 43
List the major contributions to the science of microbiology - Alexander Flemming
He discovered/produced the smallpox vaccine.
Discovered first cure for syphilis.
-> advocated and developed chemotherapy
Invented the microscope - saw microorganisms on cloth through lens.
Discovered penicillin (antibiotics)
Term 4 of 43
hydrolytic reaction
a chemical reaction in which a water molecule is added to break a covalent bond
a chemical reaction in which two or more molecules combine to produce water or
another simple molecule
A chemical reaction that breaks apart a larger molecule by adding a molecule of water
A spontaneous chemical reaction in which there is a net release of free energy.
,Term 5 of 43
exergonic reaction
A spontaneous chemical reaction in which there is a net release of free energy.
a chemical reaction in which a water molecule is added to break a covalent bond
A chemical reaction that breaks apart a larger molecule by adding a molecule of water
A nonspontaneous chemical reaction, in which free energy is absorbed from the
surroundings.
, Term 6 of 43
List and explain the impact of microbes on the environment - relationships and ecology
1) Can affect the climate by production/use of CO2, N2, O2, CH4
2) Participate in symbiotic relationships with other organisms
3) primary producers -> can convert N2 gas into form we can absorb
(first organisms were thought to be RNA molecules- all you need are enzymes)
1) Only a small fraction of microbes cause diseases-
2) Diseases caused by microbes are called Infectious Diseases
Microbes are the first living creatures on planet earth
They are:
1) Are More diverse than plants and animals
2) Are More abundant that any other livings]
3) grow in every ecological niche on earth that has a source of liquid H2O (they can live
almost ANYWHERE)
Can transform the geosphere
-> carbon can have different forms - inorganic and organic (inorganic in gas, organic in
life, etc.)
-> microorganisms can change these from one form to another
ex: organic can be transformed into CO2 or CH4, and CO2 can be transformed back into
organic (interchanging carbon one form to another).
ex: N2 gas into NH4 into organic nitrogen.
Involved in Nitrogen, Carbon, Oxygen, and Sulfur cycles.
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