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slamgirl [31]
3 years ago
7

#3 please help I don’t know this this

Biology
1 answer:
Ghella [55]3 years ago
8 0
Its number 4)
good luck

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In Escherichia coli, the genes lac , gal , trp , and his are necessary for utilization of lactose, utilization of galactose, syn
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Answer:

Minimal media + glucose + streptomycin

Explanation:

Those capable of synthesizing galactose can grow in minimal media, the availability of streptomycin will destroy those who are susceptible to the antibiotic, whereas glucose, a carbon source from which galactose may be produced and will encourage growth.

Therefore:

The medium should not include galactose when selecting for gal⁺.

Streptomycin should be present in the medium to select against str^s.

The medium to choose is: Minimal media + glucose + streptomycin.

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Gram staining identifies different bacteria types and it separates bacteria into two groups (gram negative and gram positive) based on their cell wall constituents through the use of different special dyes. Simple staining involves the use of a single stain solution and is unable to identify the exact organism.






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If you had the job of DNA polymerase, you'd need to create a new strand to attach this one. What would the order of the letters
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T T T A A A G G G C C C T A G

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What are chromosomes?
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Chromosomes are a threadlike interrelation of nucleic acids along with protein that is found in the nucleus of most/more of living cells and organisms that carries genetic info in the form of genes.

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