Describe how different strains of E. coli can reveal different linkage arrangements of genes in Hfr crosses

What will be an ideal response?


Different strains may have different F factors and therefore different initiation points for chromosome transfer.

Biology & Microbiology

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An 8-month-old female infant is admitted to the emergency department in respiratory distress on Christmas Eve. A nasopharyngeal aspirate is obtained and sent to the laboratory on ice for analy-sis. The most probable organism that would be isolated is:

a. varicella-zoster virus. b. respiratory syncytial virus (RSV). c. rotavirus. d. coxsackievirus.

Biology & Microbiology

Which of the following is the smallest unit in terms of size?  

A.  quadriceps B.  myofibril C.  muscle fiber D.  sarcomere E.  myofilaments

Biology & Microbiology

Impulses conducted along the transverse tubules of the muscle fiber stimulate  

A.  the release of ATP. B.  the binding of actin to the Z lines. C.  tropomyosin and troponin binding. D.  the release of calcium ions. E.  the release of acetylcholine.

Biology & Microbiology

The process of producing energy from organic substrates in the absence of oxygen is called ________ metabolism

Fill in the blank(s) with correct word

Biology & Microbiology