The T_4 bacteriophage rII mutant strain fails | vedclass

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(D) This experiment is based on the complementation test performed by Seymour Benzer. $1$. The $rII$ mutants of $T_4$ bacteriophage are unable to grow

Vedclass · Accepted Answer

Both strains have different cistrons.

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(D) This experiment is based on the complementation test performed by Seymour Benzer. $1$. The $rII$ mutants of $T_4$ bacteriophage are unable to grow on $E. coli$ strain $K$. $2$. When two different $rII$ mutants are introduced into the same $E. coli$ cell,they can complement each other if the mutations are in different functional units (cistrons). $3$. If the mutations are in different cistrons,the functional protein missing in one mutant is provided by the other,allowing the phage to replicate and lyse the host cell. $4$. Therefore,the lysis occurs because the two strains have mutations in different cistrons,which complement each other to restore the wild-type function.

Column-$I$	Column-$II$
$(a)$ Lactose	$(i)$ Functional part of the gene
$(b)$ Release factor	$(ii)$ Inducer of $Lac$ operon
$(c)$ Histone	$(iii)$ Packaging of $\text{DNA}$
$(d)$ Exon	$(iv)$ Termination of translation

The $T_4$ bacteriophage $rII$ mutant strain fails to lyse $E. coli$. However,when two strains $rII^X$ and $rII^Y$ are mixed,they lyse $E. coli$. What is the possible reason for this?

Similar Questions

Match Column-$I$ with Column-$II$:

Column-$I$ Column-$II$

$(a)$ Lactose $(i)$ Functional part of the gene

$(b)$ Release factor $(ii)$ Inducer of $Lac$ operon

$(c)$ Histone $(iii)$ Packaging of $\text{DNA}$

$(d)$ Exon $(iv)$ Termination of translation

Statement $P$: $m-RNA$ contains $75$ nucleotides.
Statement $Q$: There are $20$ types of $t-RNA$ in the cytoplasm.

The information flow or central dogma of modern biology is:

What do genes control?

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