SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Used to hook on to things
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Looks like a tail and helps bacteria move
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Small pieces of DNA
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Single-celled organism
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Detailed explanation-1: -The pili are involved in conjugation. This is the transfer of genetic material between cells, and pili have a hollow core for this purpose. The conjugation pilus, also called sex pilus or F pilus, has receptors to recognize recipient cells to receive the donor’s genetic material.
Detailed explanation-2: -The external ends of the pili adhere to a solid substrate, either the surface to which the bacterium is attached or to other bacteria.
Detailed explanation-3: -There are two basic types of pili: short attachment pili and long conjugation pili. Figure 2.5C. 1: Adhesive Tip of Bacterial Pili Binding to Host Cell Receptors. Short attachment pili, also known as fimbriae, are usually short and quite numerous (Figure 2.5C.
Detailed explanation-4: -Flagella and pili are both necessary for efficient attachment of Methanococcus maripaludis to surfaces.