The drug of choice for the treatment of granuloma inguinale, which is a major cause of genital ulcers in India, New Guinea, and part of South America, is:
a. clindamycin.
b. doxycycline.
c. imipenem.
d. gentamycin.
B
The organism that causes genital ulcers is K. granulomatis. Granuloma inguinale is uncommon in the United States but is recognized as a major cause of genital ulcers in India, Papua New Guinea, the Caribbean, Australia, and parts of South America. The causative agent is sexually transmitted, although the possibility exists that it may be nonsexually transmitted as well. No antibiotic susceptibility testing is performed. Doxycycline and trimethoprim-sulfamethoxazole combination are the most effective drugs for the therapy of granuloma inguinale.
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Suppose that you have discovered a new mutant in Drosophila melanogaster. What kinds of genetic crosses should you do to determine if the allele causing the mutation is inherited as an autosomal dominant trait, an autosomal recessive trait, or a sex-linked trait?
What will be an ideal response?
This cycle begins when the lambda circular chromosome integrates into the host cell's DNA by
crossing over. Once integrated, the lambda genes are mostly inactive. This cycle is referred as
a. lytic cycle. b. lysogenic cycle. c. Krebs cycle. d. citric acid cycle. e. lytic or lysogenic cycle.
The daughter chromatids are separated and pulled to their respective poles during ________ of mitosis.
Fill in the blank(s) with the appropriate word(s).
The production of which cell type requires a different nuclear division mechanism that halves the chromosome number?
A. Somatic cells B. Kidney cells C. Germ cells D. Brain cells E. Lymphatic cells