Q: Which of the following equations correctly represents the oxidation of glucose during glycolysis?

$$ \text{C}_6\text{H}_{12}\text{O}_6 + 2\text{NAD}^+ + 2\text{ADP} + 2\text{P}_i \rightarrow 2\text{Pyruvate} + 2\text{NADH} + 2\text{ATP} + 2\text{H}_2\text{O} $$

Question 1

Which scientist is credited with introducing cleanliness and other aseptic practices into nursing, significantly reducing infection rates in hospitals?

Accepted Answer

Florence Nightingale

Question 2

Which of the following statements best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack internal membranes and organelles, while eukaryotic cells contain these structures.

Question 3

Which of the following is NOT a function of good bacteria in the human body?

Accepted Answer

Causing viral infections

Question 4

Pasteur’s swan-neck flask experiment disproved which widely held theory?

Accepted Answer

Spontaneous generation

Question 5

Which of the following best describes the structure of a phospholipid in a cell membrane?

Accepted Answer

Two fatty acid tails and a phosphate head, with the tails hydrophobic and the head hydrophilic

Question 6

Which of the following equations correctly represents the oxidation of glucose during glycolysis?

Accepted Answer

$$ 	ext{C}_6	ext{H}_{12}	ext{O}_6 + 2	ext{NAD}^+ + 2	ext{ADP} + 2	ext{P}_i ightarrow 2	ext{Pyruvate} + 2	ext{NADH} + 2	ext{ATP} + 2	ext{H}_2	ext{O} $$

Question 7

Which of Koch’s postulates is best demonstrated when a suspected pathogen is isolated and grown in pure culture?

Accepted Answer

The agent is isolated and grown outside the host.

Question 8

Which of the following best explains why water is a polar molecule?

Accepted Answer

Oxygen is more electronegative than hydrogen, causing unequal sharing of electrons.

Question 9

Which of the following is a correct description of the Gram-positive bacterial cell wall?

Accepted Answer

Thick peptidoglycan layer, teichoic acids embedded

Question 10

Which of the following best describes the role of NAD+ in cellular respiration?

Accepted Answer

Transfers electrons by cycling between oxidized (NAD+) and reduced (NADH) forms

Question 11

Which of the following is a real-world example of fermentation?

Accepted Answer

Production of ethanol by yeast in the absence of oxygen

Question 12

Which of the following best describes the function of ribosomes in prokaryotic cells?

Accepted Answer

Synthesize proteins by translating mRNA

Question 13

Which of the following is a correct statement about the fate of pyruvate in aerobic conditions?

Accepted Answer

Pyruvate is converted to acetyl-CoA, which enters the citric acid cycle.

Question 14

Which of the following best describes the function of the electron transport chain in cellular respiration?

Accepted Answer

Uses electrons from NADH to create a proton gradient for ATP synthesis

Question 15

Which of the following is a characteristic unique to eukaryotic cells?

Accepted Answer

Presence of membrane-bound organelles such as mitochondria

Question 16

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

Joining monomers to form polymers by removing water

Question 17

Which of the following is a function of the bacterial glycocalyx?

Accepted Answer

Protects against desiccation and helps bacteria adhere to surfaces

Question 18

Which of the following best explains why Gram-negative bacteria are often more resistant to antibiotics than Gram-positive bacteria?

Accepted Answer

They possess an outer membrane that restricts entry of many antibiotics.

Question 19

Which of the following is a correct description of an ionic bond?

Accepted Answer

Electrons are donated from one atom to another, resulting in charged ions.

Foundations of Microbiology: History, Chemistry, Cell Structure, and Metabolism

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