BIOD 171 FINAL EXAM - At Stuvia, you will find the best notes, summar...

BIOD 171 FINAL EXAM

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1.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.

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

• 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.

2.Upon cellular injury, which metabolic process is involved during the growth and repair phases of the cell? Stuvia.com - The Marketplace to Buy and Sell your Study Material

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Stuvia.com - The Marketplace to Buy and Sell your Study Materialhttps://www.coursehero.com/file/35155616/Initial-Examdocx/ This study source was downloaded by 100000830916879 from CourseHero.com on 10-20-2021 12:48:59 GMT -05:00 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

• 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

• Identify what type of electron microscope was used to capture the following image

and explain your choice. Stuvia.com - The Marketplace to Buy and Sell your Study Material

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Stuvia.com - The Marketplace to Buy and Sell your Study Materialhttps://www.coursehero.com/file/35155616/Initial-Examdocx/ This study source was downloaded by 100000830916879 from CourseHero.com on 10-20-2021 12:48:59 GMT -05:00 The above image is captured via a Transmission Electron Microscope (TEM). Even at 20nm resolution (inset image), subcellular substructures are still visible. The image lacks the outside ‘shell’ only appearance of SEM.

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. A new or sterilized loop is absolutely required for each phase. Failure to do so would prevent the establishment of a dilution gradient, as the same bacterial concentration would be spread across both phase regions, regardless of whether or not the culture is pure.

2.The number of phases (3 vs. 4) and/or the number of times a loop passes through a previous phase (once vs. multiple times) is acceptable provided what happens?Either deviation is acceptable in practice provided the resulting gradient contains within it Stuvia.com - The Marketplace to Buy and Sell your Study Material

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