Question 1

Which of the following best explains why methanogenic Archaea are able to produce methane in anaerobic environments?

Accepted Answer

They use $$CO_2 as an $$electron acceptor and reduce it to methane.

Question 2

A researcher is studying a new antibiotic that inhibits the function of the F$$_1F$_0$$ ATP synthase in bacteria. What would be the most direct effect of this antibiotic?

Accepted Answer

It would prevent the synthesis of ATP from ADP and inorganic phosphate.

Question 3

During a reaction in the electron transport chain, an electron acceptor must:

Accepted Answer

Have a higher reduction potential than the electron donor.

Question 4

Which of the following is NOT part of the updated (modern) Central Dogma of Biology?

Accepted Answer

DNA makes lipids

Question 5

A chronic virus is best described as one that:

Accepted Answer

Continuously buds from the host cell for a long time period.

Question 6

Which of the following medical instruments is NOT matched properly with an antimicrobial method that could be used to clean it?

Accepted Answer

Contact lenses - Quaternary ammonium salt (QUAT)

Question 7

Which of the following is a palindromic DNA sequence?

Accepted Answer

$$5'-GAATTC-3'$$

Question 8

A mutation called 'frameshift' best fits which of the following descriptions?

Accepted Answer

The insertion or deletion of nucleotides that changes the reading frame of the gene.

Question 9

Which of the following is NOT a component of the inflammatory response?

Accepted Answer

Activation of B cells to produce antibodies

Question 10

Which of the following is prescribed to treat anaerobic bacterial infections and infections caused by flagellated protozoa such as Giardia?

Accepted Answer

Metronidazole

Question 11

Which of the following statements about the lagging strand at a replication fork is correct?

Accepted Answer

The lagging strand is synthesized in short fragments called Okazaki fragments.

Question 12

Which of the following is NOT a good bacterial target for an antibiotic with a high therapeutic index?

Accepted Answer

Lipid synthesis

Question 13

Which of the following is NOT part of the Schistosoma life cycle?

Accepted Answer

Eggs are ingested by humans after contaminated food

Question 14

Which of the following does NOT describe a role the complement system plays in your body's response to an infection?

Accepted Answer

Complement proteins directly activate B cells to produce antibodies.

Question 15

Which of the following is the correct order for the three steps in the polymerase chain reaction (PCR), starting with a double stranded DNA sequence?

Accepted Answer

Denature the DNA, anneal primers, extend the DNA

Question 16

Which of the following is NOT a function of polymorphonuclear cells (PMNs)?

Accepted Answer

Antigen presenting cells

Question 17

Which of the following is the best example of a competitive inhibitor of bacterial folic acid synthesis?

Accepted Answer

Sulfonamides

Question 18

Which of the following statements about tRNA is correct?

Accepted Answer

The anticodon on the tRNA base pairs with the codon in the mRNA.

Question 19

Which of the following is NOT a method used to alter gene expression in bacteria?

Accepted Answer

Changing the amino acid sequence of a protein

Question 20

Which of the following is NOT a role of the sigma factor in bacterial transcription?

Accepted Answer

It is part of the core RNA polymerase enzyme.

Microbiology Exam II: Comprehensive Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard