Portage Learning BIOD 171 FINAL EXAM latest
FINAL EXAM
1. True or False: A virus is considered a microorganism.
False. Viruses are not living and as
... [Show More] such are not considered microorganisms. Viruses can,
however, be classified as microbes, a more general term that includes microorganisms and
viruses.
2. What is the smallest biological unit of life?
A cell.
3. At a generalized level, all cells are comprised of what?
Macromolecules*
*A student may also answer: Proteins, Lipids, Nucleic acids and Polysaccharides but they
must answer with all four to be fully correct.
1. Animalia, Plantae, Fungi and Protista are all classification under what type of organism?
A. Bacteria
B. Eukarya
C. Archaea
D. Virus
B. Only Eukarya contains animals, plants, fungi and protists.
2. All multicellular microorganisms classified as Animalia are autotropic.
False—they are heterotropic.
3. Microorganisms classified as obtain most of their energy by converting light energy
into chemical energy.
Plantae
1. Define catabolism.
Catabolism is the process of breaking down larger molecules into useful energy sources.
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Portage Learning BIOD 171 FINAL EXAM latest
2. Upon cellular injury, which metabolic process is involved during the growth and repair phases of
the cell?
The anabolic process would be active as it (by definition) is involved in the building up of
small complexes into larger complexes.
1. What is one of the main functions of light reactions?
Similar to the electron transport chain, one of its main functions is to generate a proton
concentration gradient to generate ATP.
2. True or False: Dark reactions can occur in the presence or absence of light.
True. The term ‘dark reactions’ (also known as the Calvin Cycle) simply denotes the second
stage in photosynthesis—dark reactions do not actually require darkness in order to occur.
1. Assuming a constant (non-adjustable) light source power, identify the part of the microscope you
would adjust to limit the amount of light entering the microscope.
Select all that apply.
A. Objective
B. Condenser
C. Iris diaphragm
D. Eye piece
C. The iris controls the amount of light that passes through the sample and into the objective
lens. Thus, it can be adjusted (opened or closed) to alter the amount of light.
2. What is the total magnification (relative to your eye) of a sample imaged with a 60x objective and
a 10x eyepiece? Show your math.
60 x 10 = 600x magnification
1. Identify what type of electron microscope was used to capture the following image and explain
your choice.
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Portage Learning BIOD 171 FINAL EXAM latest
The image was captured using a Scanning Electron Microscope (SEM). The above image
shows the trademark ‘shell’ image (no subcellular organelles are visible) reminiscent of SEM.
Only TEM is capable of visualizing subcellular substrucutres.
1. True or False: LB agar is classified as a selective, non-differential media.
False. LB agar is the most basic type of agar and like LB media supports the growth of
virtually all microbes without restriction.
2. What is agar used for in microbiology?
Agar is used to create a solid, smooth surface on which microbes can grow.
1. True or False. When performing a dilution streak a new (or sterilized) loop is not required for each
phase as long as the bacterial culture is pure [Show Less]