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natima [27]
3 years ago
15

Initiation of bacterial mRNA synthesis (transcription) requires

Biology
1 answer:
myrzilka [38]3 years ago
5 0

Answer:

Sigma factor is the name of the protein and it helps RNA polymerase to recognize promoter.

Explanation:

RNA polymerase is the enzyme which helps in the transcription of DNA duplex. In bacteria, a protein called sigma factor is present in RNA polymerase which is responsible for the initiation of transcription.

The sigma factors gives the ability to RNA polymerase to recognize the promoter sequence. If the sigma factor is not present in RNA polymerase than this enzyme can not distinguish between promotor and other sequences.

So the sigma factor increases the affinity of RNA polymerase towards promoter and helps in initiation of the transcription. Sigma factor gets released from the core enzyme when the chain reaches 8-9 bases.

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Luden [163]

Answer:

The correct option is A. Polycythemia Vera

Explanation:

Polycythemia vera is a myeloproliferative disorder of bone marrow hematopoietic cells that causes excessive production of all types of blood cells.

Primary erythrocytosis occurs as a result of polycythemia vera, in this myeloproliferative disorder the bone marrow produces too many red blood cells along with excessive amounts of white blood cells and platelets. Bone marrow under normal conditions produces blood cells and contains the precursor cells of the three series: red blood cells, white blood cells or leukocytes and platelets or thrombocytes, this disorder is characterized by excessive or uncontrolled proliferation or growth of these cells. The increased production of red blood cells or erythrocytes is called erythrocytosis.

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3 years ago
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You have a cup of beans in front of you with 20 white beans and 20 red beans. (You can also use candy, buttons, or coins). These
AURORKA [14]

Answer:

Number 3

Explanation:

Dominant: 20, Recessive: 20

An allele is the alternative of a gene. On his case, these beans represent the alleles for a simple Mendelian trait, where red is dominant (R) and white is recessive (r).

As states earlier there are 20 red beans (20 dominant alleles) and 20 white beans (20 recessive beans) and each beach represent an allele.

3 0
3 years ago
Why would the introduction of rabbits into Australia possibly hurt other members of the food web?
iragen [17]
Well, rabbits would eat all of the vegetation leaving other animals without food.
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3 years ago
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What are some reasons why common names are insufficient for naming animals? answer in a short paragraph form and include at leas
lana66690 [7]

Answer:

Scientific names of animals use both the genus and species name, which is much more specific than common names, and gives more information.

For example, using the name cat just tells us that the animal is a cat

however, the scientific name felis catus, tells us that the species is catus and the genus is felis

Explanation:

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3 years ago
Select all that apply.
trapecia [35]
A habitat<span> is an ecological or </span>environmental<span> area which is inhabited by particular species of animals, plants, or other type of organism.
</span><span>Environmental factors that create different habitats include:
temperature
topography
growing seasons
animals
plants</span>
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