Hemophilia is an X-linked recessive allele causing a blood disorder. What are the chances that a daughter of a normal man and a woman, who is heterozygous for the disease, will have hemophilia?
A) 0%
B) 25%
C) 75%
D) 100%
A
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Which of the following is a difference between chlorophyll a and chlorophyll b?
A) Chlorophyll a is a pigment, and chlorophyll b is the enzyme that transfers excited electrons from chlorophyll a to electron carriers of the thylakoid membrane. B) Chlorophyll a absorbs yellow light, and chlorophyll b absorbs green. C) Chlorophyll a contains magnesium in its ring structure, whereas chlorophyll b contains iron. D) Chlorophyll a and b absorb light energy at slightly different wavelengths.
In most cases, pathogens leave the host via the portal of exit through:
a. sloughing b. adhesion c. discharge d. secretion e. diffusion f. filtration g. excretion
Please choose the method of antimicrobial susceptibility testing that involves measuring and evaluating zones of inhibition around antibiotic disks placed on a culture of bacteria prior to incubation.
ELISA test Kirby-Bauer test Tube dilution test Gram stain test Beta-lactamase test
Amebiasis symptoms include
A. urinary frequency and pain, and vaginal discharge. B. bloody, mucus-filled stools, fever, diarrhea, and weight loss. C. chills, fever, and sweating. D. fever, swollen lymph nodes, and joint pain. E. sore throat, low-grade fever, and swollen lymph nodes.