Which of the following is not used to help identify individual chromosomes in a karyotype?
A) Centromere position
B) Point mutations
C) Chromosome size
D) Banding pattern on staining
E) Heterochromatin regions
B
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Chromatin remodeling refers to the process by which:
A. nucleosomes are repositioned to expose different stretches of DNA to the nuclear environment. B. DNA strands are "straightened out" to allow access to the proteins that carry out transcription. C. DNA strands are "unzipped" to allow access to the proteins that carry out transcription. D. methylation occurs in CpG islands. E. mutations change DNA structure and therefore chromatin structure.
Which type of reproductive isolation
mechanism is most closely related to allopatric speciation?
a. temporal b. mechanical c. behavioral d. ecological e. genetic
A 33-year-old soldier has recent weight loss, night sweats, fever, and cough. Results of a PPD (Tuberculin) test show redness and swelling at the site of injection. Radiograph results of the chest show bilateral upper lobe involvement and mediastinal and hilar lymphadenopathy. Which of the following describes the microbe causing this disease?
A. Acid-fast staining filamentous bacteria B. Acid-fast staining bacillus C. Gram-negative bacillus D. Gram-staining bacillus
Rubella vaccine is a(n) (attenuated/inactivated/subunit) vaccine and should not be given to pregnant women
What will be an ideal response?