Exam 2 Flashcards
(25 cards)
What is the best definition of oxidative phosphorylation?
B) A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP.
True or false: the electron transport chain always requires oxygen in prokaryotes.
False
Which of the following is true regarding aerobic respiration?
D) The production of most energy by oxidative-level phosphorylation.
True or False: Glycolysis requires oxygen.
False
Which of the following statements are TRUE?
1 - electon carriers are located on ribosomes
2- ATP is a common intermediate between catabolic and anabolic pathways
3- ATP is used for long term storage of energy and so is often found in storage granules
4-anaerobic organisms are capable of generating ATP via respiration
5-ATP can be generated by me how of protons across protein channels
2,4,5
Which of the following statements regarding the glycolysis pathway is FALSE?
D-One molecule of ATP is expended.
True or False: Denatured proteins, like enzymes, cannot refold and become active again, while coagulated proteins can refold and become active again.
False
Where does glycolysis occur in eukaryotic organisms?
A) cytoplasm
Aerobic respiration in prokaryotes begins with a single molecule of glucose, which is how many Carbons, and ends with the production of ATP and generation of how many total CO2 molecules?
A) 6:38:6
Which line best depicts a thermophilic bacteria incubated at 0°C?
C. No growth
If cells are grown in media containing amino acids labeled with radioactive nitrogen (15N), most of the radioactivity will be found in the cells’?
D) DNA and proteins
The highest biosafety level (BSL) for highly pathogenic bacteria is?
B) BSL-4.
True or false: highly acidic or basic environments will denature proteins?
A) True
Which of the following is an advantage of the direct microscopic count?
C) requires no incubation time
A growth media that contains only a specific organic molecule for growing only those bacteria that can metabolize it would be known as a(n)?
A) Selective media
All of the following are characteristics of Biofilms except?
C) Involved in only 25% of human infections
What enzyme is responsible for neutralizing superoxide radicals?
B) Superoxide dismutase
Most bacteria reproduce by?
D) binary fission.
Which of the following best describes the pattern of microbial death?
A) The cells in a population die at a constant rate.
Other options include B) All the cells in a culture die at once, C) Not all of the cells in a culture are killed, and D) The pattern varies depending on the antimicrobial agent.
Which of the following does NOT achieve sterilization?
B) pasteurization
Other options include A) dry heat, C) autoclave, and D) Ionizing radiation.
Which of the following can be used to sterilize heat sensitive materials?
A) filtration
Other options include B) autoclave, C) pasteurization, and D) dry heat.
Microwave radiation is capable of killing microorganisms by?
B) Heat only
True or False: one drawback of the plate count technique is the need to dilute the bacteria before plating.
A) True
True or False: A disinfectant can also be a good antiseptic.
B) False
