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Rama09 [41]
2 years ago
12

Plzzzz help i really need it

Biology
1 answer:
katovenus [111]2 years ago
3 0

Answer:

3

Explanation:

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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.

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

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3 years ago
The photo shows a seedling that is growing. Which stimulus causes the stem of the seedling to grow upward?
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Let's suppose you were interested in developing drugs to prevent epigenetic changes that may contribute to cancer. What cellular
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Answer:

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Epigenetics can be defined as the study of any heritable change in the phenotype that does not involve modifications in the DNA sequence. Epigenetic mechanisms can be classified into three major types: 1-DNA methylation, 2-histone modifications (e.g., acetylation, methylation, phosphorylation, etc), and 3-regulatory non-coding RNAs (e.g., miRNAs, lncRNAs, siRNAs, etc) that modulate target gene expression via the RNA interference pathway. There are different types of proteins that are involved in these complex epigenetic mechanisms, and those cited above represent only some examples that can be used as therapeutic targets.

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