Exam II Flashcards
Which of the following can form endospores?
A. E. coli
B. Salmonella enterica
C. Bacillus anthracis
d. majority of archaeal microorganisms
C
Which of the following is true about sporulation/endospore structure?
A. the cortex is comprised of peptidoglycan that has a higher degree of crosslinking compared to the cell wall
B. spore coats are comprised of proteins typically found on the external surface of the vegetative cell.
C. the sporulation process can be reversed at any point
D. the sporulation process takes 20-24 hours to complete
E. none of the above are true
E.
Which of the following is true regarding enzymes?
A. only proteins can serve as enzymes
B. they are much smaller in size than their substrates
C. they are constitutively expressed
D. prosthetic groups are loosely associated with enzymes
E. none of the above
E
Which of the following is not true regarding the pentose-phosphate pathway?
A. is only found in bacteria
B. is a great source of NADPH
C. a wide variety of 3-7 carbon sugar phosphate molecules will be made
D. some intermediates that can be formed can be used to make glucose
A
Which of the following is true regarding the TCA cycle?
A. a total value of 6 NADH molecules are produced by the end of the cycle
B. a molecule of FADH2 is produced in the first and second half of the TCA cycle.
C. substrate level phosphorylation to make ATP occurs in the second half of glycolysis
D. glucose is not completely broken down until the conclusion of the second half
E. none of the above
D
T/F if the change in free energy is positive then the reaction is said to be endergonic and typically involved in anabolic reactions
True
T/F nicotinamide within NAD+ is able to stabilize the addition of two electrons due to the presence of a benzene ring
False
T/F the Entner- Doudoroff pathway is only found in Bacteria
True
T/F NADPH and NADH function similarly in catabolic reactions
False
T/F when bacteria undergo fermentation, the starting sugar is always completely broken down
False
T/F: in the classical ETC discussed in class, the quinone complex will only receive electrons from complex I
False
T/F all anaerobic microorganisms require an ETC. Explain
false, can use alternative pathways such as stickland
____________ is the branched, 5-carbon hydrocarbon that is found comprising archael cell membranes
isoprene
