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Pie
4 years ago
5

Explain how RNA polymerase recognizes where transcription should begin. Describe the promoter, the terminator, and the transcrip

tion unit.
Biology
1 answer:
Sever21 [200]4 years ago
7 0

Answer:

Explanation:

Transcription is the process by which a DNA nucleotide sequence is used as a template for the synthesis of an RNA molecule, which can be mRNA, tRNA or rRNA, by means of the enzyme RNA dependent DNA polymerase. Transcription in prokaryotes and eukaryotes differs in several respects, so they are studied separately.

1. The precursors of RNA synthesis are the four ribonucleotides 5 ’triphosphates (adenosine 5’-triphosphate, guanosine 5’-triphosphate, cytosine 5’-triphosphate and uridine 5’-triphosphate).

2. In the condensation reaction between the 5 'trisphosphate group of the incoming nucleotide and the 3'-OH group of the last nucleotide in the chain, the incoming nucleotide loses its two terminal phosphate groups. Its α group is used in the phosphodiester bond that binds it to the chain. This reaction occurs at the polymerase catalytic site.

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Ugo [173]

Answer:

Acrylic.

Explanation:

Acrylic is the synthetic fibre which resemble silk and wool. It is also known as artificial wool or synthetic wool.

7 0
3 years ago
Read 2 more answers
What several ways in which invasive species can be introduced? (intentionally or unintentionally).
mariarad [96]

Answer: Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.

6 0
3 years ago
Please help! punnet square and shouldn’t be hard! thank you
irina1246 [14]

Answer:

In the resulting offspring the correct proportions are for the genotype 1:1 and for the phenotype 1:1 (first option).

Explanation:

According to Mendel's Laws, the product of the cross between a heterozygous individual and a homozygous recessive for a character will always be a hybrid or recessive offspring as the Punnett square shows on image.

For the character -tall and short- of the pea plant:

Alleles    t         t

T           Tt        Tt

t             tt         tt

<u>For the genotype</u>: probabilities that in the offspring there are hybrid individuals with genotype Tt is 50% and recessive tt 50% .

<u>For the phenotype</u>: the probabilities of tall plants in the offspring are 50%, and 50% short plants.

A 50:50 ratio, for genotype and phenotype, is equivalent to saying that both phenotypic and genotypic ratio is 1:1.

Learn more:

Example of Punnett square brainly.com/question/1299325

4 0
3 years ago
The cryosphere represents all living things a. true b. false
melisa1 [442]

False

Cryosphere can be defined as the portion of the earth’s where the water is in its solid form which includes lake ice, snow, ice caps, sea ice. Thus, cryosphere form an integral part of the global climate system and it overlap with the hydrosphere. Furthermore, the snow or ice areas are subjected to temperature below 320F for at least part of the year.

5 0
3 years ago
Read 2 more answers
Total kinetic energy of all the atoms that make up a sample of matter
Anvisha [2.4K]
Temperature. Also, you should put more detail into your question, as it's not entirely clear what your asking.
5 0
4 years ago
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