Those microbes are part of the normal flora, but capable of causing disease especially in immuno-imcompetent people are called:
A. Opportunistic pathogens
B. Asymptomatic pathogens
C. Virulent pathogens
D. Pathogens
Ans: A. Opportunistic pathogens
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Why do X-linked disorders affect males more often than females?
a. The disorders are lethal in female embryos so affected females are unseen b. Females that carry the trait usually have one functional allele. c. Carrier mothers pass the mutated allele to all their sons. d. Affected fathers pass the X-linked recessive allele to all their sons.
Which of the following is NOT a common food allergen?
Select one: a. Eggs b. Corn c. Nuts d. Seafood
You have identified a mutant in human cells that when shifted to 37°C, the microfilaments depolymerize (fall apart). Which of the following would be true about this mutant at 37°C?
A) The endoplasmic reticulum could still import polypeptides but could no longer synthesize lipids. B) The sister chromatids would no longer be attached to each other. C) The cells would no longer be able to produce ATP. D) The mitochondria would no longer work. E) The cells would change shape.
When a DNA fingerprint is created, what determines the size of each fragment?
A) the number of PCR cycles that are used B) the size of the individual's genome C) the number of times the repeating sequence is repeated in each STR region D) the age of the individual from whom the sample was taken E) the amount of time the electric current is applied during gel electrophoresis