Exam (elaborations)
Portage Learning BIOD 171 Final Exam
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- BIOD 171
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- Portage Learning
Portage Learning BIOD 171 Final Exam
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Portage Learning BIOD 171 Final Exam, Portage Learning BIOD 171 Final Exam
True or False: A virus is considered a microorganism.
False. Viruses are not living and as such are not considered microorganisms.
Viruses can, however, be classified as microbes, a more general term that
includes microorganisms and viruses.
1. What is the smallest biological unit of life?
A cell.
2. 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. Which of the following microorganisms are considered to be Eukarya? Select all
that apply.
A. Animalia
B. Plantae
C. Fungi
D. Protista
A,B,C,D
2. True of False: All multicellular microorganisms classified as Animalia are
heterotrophic.
True
3. Microorganisms classified as Plantae obtain most of their energy by converting
energy into energy.
,Light (sunlight); chemical (sugars)
1. Define catabolism.
Catabolism is the process of breaking down larger molecules into useful energy
sources.
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. In phosphorylation, the light reactions always occur where?
The process of converting light energy into chemical energy
(photophosphorylation) always occurs in the membrane.
2. True or False: The Calvin cycle must occur in the absence of light.
False. 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.
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.
False.
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