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Ch. 3 - Chemical Principles of MicrobiologyWorksheetSee all chapters
All Chapters
Ch. 1 - Introduction to Microbiology
Ch. 2 - Disproving Spontaneous Generation
Ch. 3 - Chemical Principles of Microbiology
Ch. 4 - Water
Ch. 5 - Molecules of Microbiology
Ch. 6 - Cell Membrane & Transport
Ch. 7 - Prokaryotic Cell Structures & Functions
Ch. 8 - Eukaryotic Cell Structures & Functions
Ch. 9 - Microscopes
Ch. 10 - Dynamics of Microbial Growth
Ch. 11 - Controlling Microbial Growth
Ch. 12 - Microbial Metabolism
Ch. 13 - Photosynthesis
Ch. 15 - DNA Replication
Ch. 16 - Central Dogma & Gene Regulation
Ch. 17 - Microbial Genetics
Ch. 18 - Biotechnology
Ch. 21 - Viruses, Viroids, & Prions
Ch. 22 - Innate Immunity
Ch. 23 - Adaptive Immunity
Ch. 24 - Principles of Disease
Atoms- Smallest Unit of Matter 
Introduction to Chemical Bonding
Covalent Bonds
Noncovalent Bonds
Ionic Bonding
Hydrogen Bonding

Concept #1: Isotopes

Practice: What is TRUE about carbon-13 and carbon-14?

a) They are isotopes.

b) They have the same mass number.

c) They have the same number of neutrons in their nuclei.

d) They behave differently in biological reactions.

e) None of the above are true.

Practice: How are Carbon-13 and Nitrogen-15 respectively different from the more abundant isotopes Carbon-12 and Nitrogen-14?  Carbon-13 and Nitrogen-15 _______________:

a) Each have an extra neutron.     

b) Each have an extra proton.     

c) Each have one less neutron.

d) Each have one less proton.      

e) Each have one less electron.  

Practice: The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains ________.

a) 7 neutrons.

b) 8 neutrons.

c) 8 protons.

d) 15 protons.

Concept #2: Isotopes

Practice: Radioactive isotopes are utilized for all of the following except:

a) Dating fossilized material of once living things.

b) Radiation treatment to slow or stop the development of cancer cells.

c) Labeling regions of the body with radioactivity for special imaging techniques.

d) All of the above.

Practice: The isotope Carbon-14 has a half-life of 5,730 years. How many years must pass for a sample of Carbon-14 to break down to ¼ of its original amount?

a) 5,730 years 

b) 17,190

c) 11,460

d) 2,865