Question 1

Which of the following would best distinguish whether an unknown respiratory chain is from a bacterium or a eukaryotic mitochondrion?

Accepted Answer

Whether cytochrome c oxidase is present or not

Question 2

Which of the following reactions is carried out by methanogenic Archaea?

Accepted Answer

CO$$_2 is $$reduced to CH$$_4$$ using electrons from H$$_2$$

Question 3

A mouthwash called 'Triadent' lists its key ingredients as ethanol, 0.2% chlorhexidine, mint flavor, and blue food coloring. Which ingredient acts as the main antimicrobial agent?

Accepted Answer

Chlorhexidine

Question 4

The chemical DCCD inhibits proton flow by binding to the F$$_0$$ ATP synthase. What effect would this have on ATP production?

Accepted Answer

It would stop ATP synthesis by blocking the proton channel

Question 5

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

Accepted Answer

DNA makes protein

Question 6

During a reaction in the electron transport chain, an electron acceptor ________.

Accepted Answer

must have a higher reduction potential than the electron donor

Question 7

Which of the following statements about the properties of a surface is correct?

Accepted Answer

Surface charge can influence how bacteria attach

Question 8

The following segment of double-stranded DNA is transcribed using the sigma factor $$\$$sigma^{70}$$, which recognizes a consensus 'TTGACA' at -35 and 'TATAAT' at -10. Which strand is the template, and in what direction is it read?

Accepted Answer

The bottom strand, read 3' to 5'

Question 9

Lactococcus and Streptococcus are both key fermentation microbes that are used in the production of fermented dairy products. What is their main metabolic product?

Accepted Answer

Lactic acid

Question 10

There are 61 coding codons, but only 45 tRNAs. How can 45 tRNA molecules recognize 61 codons?

Accepted Answer

The third base of the codon can wobble and pair with multiple tRNAs

Question 11

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

Accepted Answer

Surgical sponge - quaternary ammonium salt (QUAT)

Question 12

The enzyme DNA polymerase ________.

Accepted Answer

Adds new nucleotides to the 3' end of an existing nucleotide

Question 13

Which of the following is considered a palindrome?

Accepted Answer

$$5'	ext{GAATTC}3'$$

Question 14

What 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 15

A chronic virus ________.

Accepted Answer

Replicates slowly from the host cell for a long time period

Question 16

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

Accepted Answer

Eggs are ingested by humans after contaminated food

Question 17

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

Accepted Answer

Metronidazole

Question 18

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

Accepted Answer

Activation of B cells to secrete antibodies

Question 19

Polymorphonuclear cells (PMNs) are both ________.

Accepted Answer

Granulocytes and phagocytes

Question 20

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 lyse infected host cells

Microbiology Exam II: Comprehensive Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards