In the control of breathing, what is the factor that is most closely monitored by chemoreceptors?

A. Blood pressure
B. The amount of CO2 in the blood
C. The amount of urea in the blood
D. The amount of ammonia in the blood


Ans: B. The amount of CO2 in the blood

Biology & Microbiology

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Assume brown eyes is completely dominant to blue eyes and this trait is controlled by a single gene. If

400 people in a population of 10,000 have blue eyes, how many people would be expected to be heterozygous for this trait? (Hint: use the Hardy-Weinberg formula) A. 800 B. 540 C. 320 D. 960 E. It is not possible to determine with the information provided.

Biology & Microbiology

Which of the following is/are true about monoclonal antibodies?

A. They recognize a specific epitope B. They are a useful tool in disease diagnosis C. They are made by hybridizing a myeloma cell and an activated B cell D. All of the choices are correct.

Biology & Microbiology

A major, genetically determined change in the antigenic character of a pathogen is called antigenic drift.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Legionellosis is a zoonosis.

Answer the following statement true (T) or false (F)

Biology & Microbiology