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261 H+ + HCO3- H2O + CO2 The equation above shows one of the reversible reactions that occur in blood. After exercise, an athlete’s blood pH has dropped below the normal level. How will normal blood pH be restored?

A: An increase in O2 concentration in the plasma will lead to an increase in H+ concentration.

B: An increase in temperature will lead to an increase in H+ concentration.

C: An increase in sweating will lead to a decrease in OH- and H+ concentration.

D: An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentration.

Microbiology MCQ
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262 Which of the following questions is most relevant to understanding the Calvin cycle?

A: How does chlorophyll capture light?

B: How is ATP used in the formation of 3-carbon carbohydrates?

C: How is NADP+ reduced to NADPH?

D: How is ATP produced in chemiosmosis?

Microbiology MCQ
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263 Undersea landslides can disrupt marine habitats by burying organisms that live on the ocean floor. The graph above shows the size of a population of a certain organism that lives on the ocean floor. The population was affected by a recent landslide at the time indicated on the graph. Which of the following best predicts how the population will be affected by the landslide?

A: The surviving organisms will evolve into a new species.

B: The reduced population will likely have allelic frequencies that are different from the initial population.

C: The population will adapt to deeper waters to avoid future landslides.

D: The reduced population will have a greater number of different genes than the initial population.

Microbiology MCQ
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264 If ATP breakdown (hydrolysis) is inhibited, which of the following types of movement across cell membranes is also inhibited?

A: Movement of oxygen into a cell

B: Movement of water through aquaporins

C: Passage of a solute against its concentration gradient

D: Facilitated diffusion of a permeable substance

Microbiology MCQ
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265 Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the spring and decreased dramatically during the summer. The researchers hypothesized that food abundance was the limiting factor for the population. Which of the following types of data would be most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?

A: Amount of sunlight (hours/day)

B: Mean temperature (°C)

C: Density of rose pollen produced (g/m²)

D: Amount of pollen produced by each flower (g/flower)

Microbiology MCQ
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266 A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog’s brain integrates information for smell?

A: Chemoreceptors in the brain send impulses for smell in the nasal cavity.

B: Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.

C: Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the brain.

D: Receptors originating in the nose send action potentials to the motor regions of the brain.

Microbiology MCQ
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267 Fluorescent substances used in fluorescent microscopy are

A: Quinine sulphate

B: Auramine

C: All of these

D: None of these

Microbiology MCQ
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268 Treponema pallidum was discovered by

A: Schaudinn and Hoffman

B: Louis Pasteur

C: Burgey

D: Laennec

Microbiology MCQ
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269 Rh factor of the blood was discovered by scientist

A: Louis Pasteur

B: Landsteiner and Weiner

C: Janskey

D: Moss

Microbiology MCQ
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270 Neisseria gonorrhoeae was first described by

A: Neisser in 1879

B: Pasteur in 1878

C: Robert Koch

D: None of these

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