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erma4kov [3.2K]
3 years ago
13

To make an mRNA transcript from a gene, the RNA polymerase needs to 'know' where to start and to stop. What are the signals and

proteins involved in initiating and terminating RNA polymerase activity in E. coli?
Biology
1 answer:
labwork [276]3 years ago
7 0

Answer:

In E. coli promoter there are two consensus sequence which is located upstream to from the start site of the transcription. One consensus sequence is present at -10 and one at -35.  

These consensus sequences are necessary to be recognized to start the transcription. It is recognized by the sigma factor which is a part of RNA polymerase. After recognition transcription starts.

The termination of transcription occurs by a rho protein. Rho is ATP dependent RNA stimulated helicase which disrupts the complex of RNA-DNA and terminates transcription.

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ycow [4]

Your answer is B

When the F1 generation exhibits both the parental characters, this is called codominance. The offspring will be a combination of both the parent. The ABO blood group system is one of the best examples of codominance. There are different types of red blood cells such as A, B, AB and O with or without the Rh factor.

Sure hope this helps

3 0
2 years ago
How could you determine what percentage of a strawberry's mass is dna?
katrin [286]
First  you  determine  the   total mass  of  the   strawberries used
Then  determine  the    mass  of  the   DNA  obtained  from  the  strawberries
percentage  mass  is  therefore  equal  to  mass  of  the  DNA  obtained  divided  by  total  mass  strawberries  multipy  by   a  100


5 0
3 years ago
Read 2 more answers
Jessica's teacher has asked her to bring her 0.40 moles of sodium chloride to the laboratory. she should bring approximately ___
tigry1 [53]
ʜᴇʟʟᴏ ᴛʜᴇʀᴇ!
_________________________________________________________

Formula mass of NaCl = 58.5g
0.4 x 58.5 = 23.4
She should bring approximately 23.4 grams.
_________________________________________________________

нσρє тнιѕ нєℓρѕ уσυ!
gσσ∂ ℓυ¢к :)
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6 0
3 years ago
While a relatively inefficient mode of transmission, _____________ accounts for 90% of HIV infections worldwide.
Marat540 [252]

Answer:

The correct answer is - sexual transmission.

Explanation:

HIV infections can be transmitted by the various mode. Sexual transmission is one of the major mode of transmission which is comprise almost 90 % of HIV infection, according to the reports. These are relatively inefficient mode, unprotected or unnatural sex is the major mode for the HIV transmission worldwide. Cases are now comparatively less than when it was discovered due to awareness.

Thus, the correct answer is - sexual transmission.

3 0
3 years ago
Which statements correctly explain why biological productivity in the tropical ocean is so meager when compared to biological pr
Anni [7]
<span>The answer to this question would be: 
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- The sunlight penetrates deep into the tropical ocean, warming the surface waters and creating stratification of water masses.

In tropical lands, the area is getting sunlight all around the year. This will cause the plant to be able to do photosynthesis all around the year too. Sunlight can penetrate the ocean, but the intensity will be much lower in deeper part. The ocean also become warmer but it will become cold in the deeper part too. </span>
3 0
3 years ago
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