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Crank
3 years ago
14

Salt dissolved in water? Physical or chemical

Biology
2 answers:
nalin [4]3 years ago
8 0
It is a physical change
aleksley [76]3 years ago
3 0

When salt and sugar dissolve in water it is a physical change. The chemical makeup of the salt and sugar are not changed.

Physical change

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When an E. coli cell is infected by multiple phages, what route of infection (lytic or lysogenic) will the phages take? Why?
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Answer:

When an E.coli cell is infected by multiple phages,they will take either lytic or lysogenic pathway.

Explanation:

When lambda phage bacteriophage infects an E.coli,it can either undergo lytic cell growth and lyse the host cell or enter lysogenic pathway.

The operator region of lac operon in E.coli contain single repressor binding site whereas the lambda operators O_{L} and O_{R}  each contains 3 repressor binding sites (O_{L_1} ,    O_{L_2},O_{L_3} and O_{R_1},O_{R_2},O_{R_3})  that are differently occupied under different conditions.

The differential affinity of lambda repressor for the three binding sites in these operators play an important role in the maintenance of lysogenic state of lambda prophage in E.coli.

The lytic development occurs in cells infected with lambda phage that carry  C_1 gene.

In contrast,lysogeny will occur in bacteria that infected with lambda phage that harbor a deletion of Cro gene.

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_____ phase is the period during the life of a cell between the end of mitosis and the synthesis of more genetic material.
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Anything on the right of the arrow is the products so, it is glucose and oxygen.

Hope this helps :)

5 0
2 years ago
Read 2 more answers
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