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A comprehensive set of questions and answers for the biod 171 portage learning final exam. it covers various topics in biology, including cell structures, energy production, and staining techniques. The questions are multiple-choice and true/false, allowing for self-assessment and exam preparation. the detailed answers offer valuable insights into biological processes and concepts.
Typology: Exams
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Correct! Algae Bacteria Correct! Amoeba False Page 1 of 19
Yeast Which of the following are considered Protista? Select all that apply.
True Correct! tissue layers. True or False: A defining characteristic of Protista is the inability of colonies to form
To produce energy (ATP) Correct! Protein synthesis Ribosomes are located in the cytoplasm of prokaryotic cells and in the ER of eukaryotic cells. Lipid synthesis You Answered Protein modification and distribution
Identify the following cellular components by matching the number with the description. Page 2 of 19
Waste disposal via hydrolytic enzymes The function of the ribosome is (select all that apply):
Correct! 2 G Correct! 3 E Correct! 4 B Correct! 5 A The cell wall is also known as the 'outer membrane' and does not apply. A capsid is relative to a virus. The outer leaflet is only a partial description of the cell membrane. Outer leaflet Capsid Page 4 of 19
Cell envelope Correct! (select all that apply ): The combination of the cell membrane and the outer membrane is referred to as the
Cell wall The function of the Golgi is (select all that apply): Correct Answer Protein modification and distribution To produce energy (ATP) Waste disposal via hydrolytic enzymes You Answered Lipid synthesis Protein synthesis Correct! False They are heterotropic. Page 5 of 19
True True or False. All multicellular microorganisms classified as Animalia are autotropic.
Correct! False The β-oxidation pathway is responsible for the catabolism of fatty acid chains. False You Answered H2O Page 7 of 19
True chains. True or False. The β-oxidation pathway is responsible for the anabolism of fatty acid
True Correct! True or False: Chloroplasts are specific to algae and plants.
You Answered apply. The process of photophosphorylation produces which of the following: select all that
Glyceraldehyde-3-phosphate Correct! NADPH Correct! ATP Your Answer: Its main function is to generate more energy in the form of ATP from the photons. Similar to the electron transport chain, one of its main functions is to generate a proton concentration gradient to generate ATP. 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. False Page 8 of 19
What is one of the main functions of light reactions?
True Correct! True or False: Dark reactions can occur in the presence or absence of light.
You suspect a patient may have TB. Once a sample has been obtained, it is sent off to the lab for an acid-fast stain. If the patient were infected with TB, describe what you would expect to see on the stained slide. Your Answer: We would expect to see the red cells (TB+) on the blue background which is TB (negative). Useually red stain in the blue bacground confirms TB infection. You would expect to see red cells (TB+) on a blue background (TB negative). Giemsa stains are often used in the clinical setting to aid in the diagnosis of blood parasites. False Page 10 of 19
True Correct! appropriate differential test to perform. True or False: If a patient is suspected of having malaria, a Giemsa stain would be an
Your Answer: The image shown is captured by a TEM (Transmission Electron Microscope), Even the image 20nm is visible and its subcellular structure is also visible. The image lacks the outside "shell"as it can give 2D-images. 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. True Page 11 of 19
explain your choice. Identify what type of electron microscope was used to capture the following image and
You Answered True or False. The purpose of a quadrant streak is to expand a bacterial population.
Correct! True Failure to do so would prevent the establishment of a dilution gradient, as the same bacterial concentration would be spread across both phase regions. False
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? Your Answer: We can accepth the either deviation, provided the resulting gradient contains within the growth of individual colonies. If this is not seen than experiment will be repeated. Either deviation is acceptable in practice provided the resulting gradient contains within it the growth of individual colonies—if not, the experiment must be repeated. Pathogenic strains of bacteria tend to grow faster than non-pathogenic strains at 37°C, so researchers may set incubators at 25°C to restrict its growth. False
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True Correct! decrease an incubator from 37°C to 25°C. True or False. To restrict the growth of a pathogenic microbe a researcher might
When given an unknown bacterial sample the first step is to expand the current bacterial population. Which form of media best suites this need? Why?
True or False. Only directly ingesting the pre-formed clostridium toxin (neither the bacteria nor its spores) will cause disease in adults. Correct! True The mature (adult) microbiota is capable of killing the bacteria/spores. False Page 14 of 19
True Correct! True or False. There are currently no cures for tetanus.
Pneumonic plague targets the respiratory system while bubonic targets the lymph system. Gas gangrene Tetanus Correct! Anthrax Anthrax—the distinct black center at the site of infection is a hallmark of anthrax infection. True Page 16 of 19
Frost bite Identify the following disease:
plates alone. True or False. Chlyamida is an obligate parasite and as such can be grown on agar
Correct! False An obligate parasite requires a host (viable cells) to be present for its growth. Correct! False False. Unlike chickenpox blisters, which can form anywhere, the blisters associated with shingles are localized and limited to small areas.
While traveling abroad, should you be worried about coming into contact with either the Variola major or Variola minor viruses? Your Answer: No. This disease causing virus had been eradicated since October 1977. Due to global vaccinnation effort, this disease is not active anymore. It is another name for small pox virus. We should not be worried travelling due to these virus. No. Both viruses are variants of smallpox and were eradicated in 1977. You would not need to worry about coming into contact with the virus. Page 17 of 19
True entire body. True or False. Similar to chickenpox, the blisters that appear with shingles can cover the
False
What small (~30nm) single-stranded, non-enveloped RNA virus targets the CNS (central nervous system), causing potentially catastrophic damage to motor neurons? Your Answer: Polio or Poliomyelitis. It enters through the cental nervous system and replicate and damage the motor neurons. Polio, also known as poliomyelitis. Page 19 of 19
