Answers:
- Transcription takes place in the <u>nucleus</u> of the cell.
- In this process, an enzyme called<u> RNA polymerase </u>unzips approximately <u>14 base pairs of DNA </u>and adds new nitrogenous bases to the template strand to create a new strand of mRNA.
- This new strand has one difference in the base pair rules. In DNA, adenine pairs with <u>Thymine.</u>
- In mRNA, adenine pairs with <u>Uracil.</u>
Explanation:
Transcription is the first step of expression of DNA into the protein product. During transcription, the DNA is replicated in the form of RNA (Ribo nucliec acid). It takes place in the nucleus of the cell while the second step of gene expression, translation takes place in the cytoplasm of the cell.
Once the transcription is completed, all the information of a particular DNA segment is obtained in form of RNA segment. RNA contains exactly the same genetic information as contained by DNA, the difference is it has base Uracil in place of Thymine.
The general steps of the translation are six:
- An enzyme called RNA polymerase unwinds or unzips a certain segment of DNA.
- This unwinding occurs at a specific site called promoter region and forms transcription bubble.
- The enzyme RNA polymerase starts to add RNA nucleotides that are complementary wit the specific region of DNA>
- RNA nucleotides form the bonds with each other to form a complete sequence of RNA.
- The newly synthesized RNA strand detaches from DNA template
- Rewinding of DNA occurs and mRNA is ready to go into the next stage of gene expression called Translation.
Hope it helps!
<span>The answer to this question would be: sodium; opening of voltage-gated sodium channels
When the membrane potential rises above the threshold, the natrium </span>voltage-gated sodium channels will be opened. This will allow the movement of sodium to the cells. Because the concentration of sodium outside the cell is much higher than inside the cells, the sodium will flow into the cells.
Answer:
The correct answer is - natural selection or more precisely adaptive radiation.
Explanation:
Adaptive radiation is the process in the evolution of an animal or organism into different types of species or types specialized to fit different environmental conditions. These are depend on the various condition like food availablity or weather or any environemnt condition. It is the part of the natural selection that involves adapting the beneficial traits into genome of an organism over time period.
In galpago finches they are adapted different morphological condtions, based in food availblity in the particular environments even they had same ancestor is the best example of the adaptive radiation.
<u>Answer:</u>
The fluctuations that are present in abiotic cycles have an impact on living organisms and on ecosystems as a whole because any system that is present in a community requires the support of abiotic system
The materials that are present in an environment require the involvement of both biotic and abiotic system. The biotic community comprises of the living organisms that coexists in an ecosystem whereas abiotic factors are the non-living factors that influences the living of organisms in an ecosystem.
Answer:
Chlorophyll
Explanation:
Chlorophyll is a substance that is found in chloroplasts. Photosynthesis takes place in chloroplasts. The grana contains the photosynthetic pigments and the enzymes for the light reactions of photosynthesis. Chlorophyll traps light that is used in photochemical reaction.
