An elderly woman is experiencing fever, chest pain, difficulty breathing, and a cough that occasionally brings up mucus containing blood. She reports having visited family in rural New Mexico over the Labor Day weekend. A GMS-stained sample from her lungs shows the presence of large spherules. Which of the following is the most likely infecting agent?
A. Coccidioides immitis
B. Blastomyces dermatitidis
C. Histoplasma capsulatum
D. Paracoccidioides brasiliensis
E. Trichophyton rubrum
Answer: A
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If an infant is being fed only its mother’s breast milk and if the woman has not experienced her first postpartum menses, then breastfeeding provides _______ protection from pregnancy in the first 6 months following a birth.
If an infant is being fed only its mother’s breast milk and if the woman has not experienced her first postpartum menses, then breastfeeding provides _______ protection from pregnancy in the first 6 months following a birth. [A] 78-85% [B] 70-78% [C] 70% [D] > 98% [E] 85-92% [F] 92-98%
White muscles are designed to contract
a. quickly. b. quickly and for short periods. c. slowly. d. slowly for short periods. e. slowly for long periods.
The process that merges the gametes from two parents is
A. fertilization. B. meiosis. C. mitosis. D. mutation. E. conjugation.
The mismatch repair system recognizes mismatched base pairs, removes a portion of the DNA strand containing the error, and then resynthesizes the missing DNA using the correct sequence as a template. But what if the mismatch repair system instead removed a piece of the DNA strand that contained the correct sequence? What would replication of this improperly repaired sequence produce?
A. two DNA molecules bearing the same mutation B. two DNA molecules with different mutations C. two DNA molecules that are missing one nucleotide pair D. two DNA molecules with a gap where the correct sequence was excised E. one DNA molecule with a mutation and one DNA molecule with a mismatch