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4 years ago

Ap biology lab -what barriers might hinder the acquisition of plasmids

2 answers:

8 0

Restriction as a barrier to transformation apparently contributes to sexual isolation since horizontal transfer can encompass chromosomal DNA and plasmids. I hope my answer has come to your help. God bless and have a nice day ahead!

Lina20 [59]4 years ago

6 0

Answer:

The barriers could be:

-Control of plasmid replication by antisense RNA.

-Control of plasmid replication by proteins and repeated sequences.

-Incompatibility mediated by partition systems.

Explanation:

Plasmids are genetic elements that can often be a strain on the bacteria. To prevent the elimination of the plasmid, they have a control system that has to do with the number of copies. These systems respond and control to the changes that can occur in an increase in the number of copies as well as in their decrease. The systems described above are primarily responsible for plasmid incompatibility.

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How much energy must be absorbed by 45.0g of water to increase its temperature from 83 0°C to 303.0°C?

mrs_skeptik [129]

Answer: There will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from $83.0^{o}C$ to $303.0^{o}C$ .

Explanation:

Given: Mass = 45.0 g

Initial temperature = $83.0^{o}C$

Final temperature = $303.0^{o}C$

Formula used to calculate heat energy is as follows.

$q = m \times C \times (T_{2} - T_{1})$

where,

q = heat energy

m = mass of substance

C = specific heat = $4.18 J/g^{o}C$ (here, for water)

$T_{1}$ = initial temperature

$T_{2}$ = final temperature

Substitute the values into above formula as follows.

$q = m \times C \times (T_{2} - T_{1})\\= 45.0 g \times 4.18 J/g^{o}C \times (303.0 - 83.0)^{o}C\\= 41382 J$

Thus, we can conclude that there will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from $83.0^{o}C$ to $303.0^{o}C$ .

8 0

3 years ago

Which formula represents a hydrocarbon? CaO2 C5H12 CH2O H2SO4

Stella [2.4K]

A hydrocarbon has only hydrogen and carbon in it. the 1st, 3rd and 4th option all include Oxygen so the only hydrocarbon is option 2

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3 years ago

If you forget your units , is disaster guaranteed

Vera_Pavlovna [14]

In chemistry, yes...yes it is.

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4 years ago

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alexgriva [62]

The balanced equation is:

2NaCl + 2 H2o → 2 NaOH + Cl2 + H2

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3 years ago

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zzz [600]

Answer:

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2 years ago