Conjugation involves:

Question

BlackTom AI · Accepted Answer

To begin, let’s map what each option implies about conjugation versus other genetic exchange processes in bacteria.
Option 1: 'Uptake of naked DNA' describes transformation, not conjugation. In transformation, bacteria take up free DNA from the environment, typically after cell lysis, without direct cell-to-cell contact. This is distinct from conjugation, which relies on physical linkage between donor and recipient cells.
Option 2: 'Transfer of resistance via a virus' refers to transduction, where bacteriophages carry genetic material from one bacterium to another. This process is mediated by viruses and does not require direct cell pairing or mating-like contact between the bacterial cells.
Option 3: 'Gene transfer requiring cell-to-cell contact' is the hallmark of conjugation. It involves direct contact between donor and recipient cells, often mediated by a pilus or mating bridge, through which DNA (such as plasmids) is transferred.
Option 4: 'Random mutations in bacteria' describe spontaneous genetic changes within a single organism’s genome, not a mechanism of horizontal gene transfer between cells. Conjugation is an active transfer event, not a random mutational process.
Thus, by process of elimination and the defining feature of conjugation, option 3 is the correct description of conjugation.

Conjugation involves:单项选择题

类似问题

Drug resistance by HGT is happening between an E. coli strain and a pathogenic bacterium Klebsiella pneumoniae, which is causing post-operative infections. This transfer requires that living cells are in contact with one another. The most likely form of HGT is...

leu- bacteria are mixed in a flask with leu+ bacteria, and soon all bacteria are leu+. However, if the leu– cells are on one side of a U-tube and the leu+ cells are on the other, the leu– cells do not become prototrophic. This suggests which mechanism of gene transfer?

After performing a mating experiment, the agar plate has numerous transconjugants growing on it. What conclusion can be drawn from this observation?

What is the function of the F-pilus?

Which of the following statements about Hfr cells and bacterial conjugation is false?

Which of the following statements is correct?

Which of the following statements correctly describes F- cells and F+ cells?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单