Which of the following is TRUE at the end of telophase I in corn (2n = 20)?
A. Each cell has 20 chromosomes.
B. Each chromosome is paired with its homologue.
C. Centromeres connect homologous chromosomes.
D. Each cell is diploid.
E. Centromeres connect sister chromatids.
Answer: E
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The major histocompatibility complex is also called the
A) human leukocyte antigen (HLA). B) T cell receptor. C) toll-like receptor complex. D) T cell receptor or toll-like receptor.
Adenoviruses are responsible for causing diseases such as keratoconjunctivitis, pneumonia, hemorrhagic cystitis, and gastroenteritis in children. Transmission is usually via:
a. contact with rodent urine. b. respiratory secretions. c. arthropod vector. d. sexual contact.
What is the role of the epithelium?
A) Helps protect the body from the external environment B) Transmits electrical signals throughout the body C) Contracts to create body movement D) Provides the padding between the joints
Which is the best guide for selecting an effective antibiotic?
A. identification of the microbe causing the infection B. location of the patient's infection C. history of prior antibiotics prescribed for the patient D. results of antimicrobial susceptibility testing