Refer to This Text to Answer the Following Questions

question 38

Multiple Choice

Refer to this text to answer the following questions.
To map genes of a bacterial strain,conjugation must be interrupted at given times.Suppose you have Hfr cells of genotype a⁺ᵇ⁺ᶜ⁺ᵈ⁺ᵉ⁺ˢᵗʳᴿ and F⁼ cells of genotype a⁻ᵇ⁻ᶜ⁻ᵈ⁻ᵉ⁻ˢᵗʳˢ and you combine these two cultures in liquid medium in four blenders at time 0.After intervals of 3,6,9,and 12 minutes,you turn on successive blenders.
-What role does the blender play in the experiment?

• A)serves as a culture container only
• B)acts as a mechanism to bring cells into contact
• C)speeds up molecular movement of DNA
• D)shears the sex pili of conjugants
• E)hastens conjugation events

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