Q: Which equation correctly represents the calculation of atomic weight?

$$\text{Atomic~weight} = \text{Number~of~protons} + \text{Number~of~neutrons}$$

Question 1

Which of the following scientists is correctly matched with their contribution to microbiology?

Accepted Answer

Louis Pasteur – disproved spontaneous generation with the swan-neck flask experiment

Question 2

Which statement best describes the difference between spontaneous generation and biogenesis?

Accepted Answer

Spontaneous generation claims life can arise from non-living matter, while biogenesis states that living organisms arise only from pre-existing life.

Question 3

Which of the following is the correct way to write the scientific name for the bacterium that causes tuberculosis?

Accepted Answer

$$Mycobacterium~tuberculosis$$

Question 4

Which of the following is NOT a major group of organisms studied in microbiology?

Accepted Answer

Plants

Question 5

Which of the following is a beneficial activity of microorganisms?

Accepted Answer

Decomposing organic matter in the environment

Question 6

Which of the following best defines 'normal microbiota'?

Accepted Answer

Microorganisms that live on and inside the human body and usually do not cause disease

Question 7

Which of the following correctly matches the atomic particle with its charge and location?

Accepted Answer

Neutron: no charge, nucleus

Question 8

Which equation correctly represents the calculation of atomic weight?

Accepted Answer

$$	ext{Atomic~weight} = 	ext{Number~of~protons} + 	ext{Number~of~neutrons}$$

Question 9

Which of the following best describes a dehydration synthesis reaction?

Accepted Answer

A reaction in which two molecules are joined together with the removal of water

Question 10

Which of the following statements about Gram staining is correct?

Accepted Answer

After the crystal violet step, both Gram-positive and Gram-negative cells appear purple.

Question 11

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

Accepted Answer

To transfer electrons and generate a proton gradient for ATP synthesis

Question 12

Which of the following is a correct comparison between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 13

Which of the following best describes the difference between simple diffusion and active transport across a cell membrane?

Accepted Answer

Simple diffusion moves substances down their concentration gradient without energy input, while active transport requires energy to move substances against the gradient.

Question 14

Which of the following is a product of fermentation?

Accepted Answer

Lactic acid

Question 15

Which of the following best describes the endosymbiotic hypothesis?

Accepted Answer

Eukaryotic cells evolved from prokaryotic cells engulfing other prokaryotes, which became organelles like mitochondria and chloroplasts.

Question 16

Which of the following best describes an anabolic reaction?

Accepted Answer

A reaction that builds complex molecules from simpler ones, requiring energy

Question 17

Which of the following is a correct sequence of events in the Gram stain procedure?

Accepted Answer

Crystal violet, iodine, alcohol, safranin

Question 18

Which of the following best describes the function of mitochondria in eukaryotic cells?

Accepted Answer

ATP production through aerobic respiration

Question 19

Which of the following equations correctly represents the general formula for aerobic respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 20

A patient is given intravenous fluids that are isotonic to their blood cells. What will happen to the patient's red blood cells?

Accepted Answer

The cells will remain unchanged in size.

Comprehensive Study Guide for Principles of Microbiology Exam I

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