Transcription factors are necessary for an initiation of transcription at a regulated gene but not sufficient.
Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:
1. Initiation
• RNA polymerase with transcriptional factors bind to gene promoter Transcription factors can enhance the interaction between RNA polymerase and a DNA sequence- promoter, encouraging the expression of the gene. Such transcription factors are called activators. Otherwise, when the gene expression is inhibited, factors are called repressors and they bind to sequence –operator.
• RNA polymerase unwinds DNA double helix (transcription bubble is formed)
2. Elongation
• RNA polymerases adds nucleotides complementary to DNA
3. Termination
• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)
• Formed complementary RNA strand is released from DNA-RNA complex
Answer:
2nd one
Explanation:
Regardless of latitude or time of year, the sun's angle reaches closest to 90 degrees (perpendicular lines are 90 degrees) -- and is therefore at its most intense -- at the midpoint of the day: noon.
The statements that are true concerning living organisms and how they acquire energy are;
Cells, the basic unit of life, cannot survive on their own. Instead, all living organisms must obtain and use energy to live.
The daily food consumption of an organism provides the energy to support all the metabolic processes required for the organism to live.
What are Living organisms?
Living organisms can be regarded as organisms that possess characteristics such as the ability to move and reproduce.
However, they acquire useful energy in different ways, and the daily food consumption of an organism provides the energy to support all the metabolic processes.
Learn more about Living organisms at:
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Because without it you would have no support to stand
Answer:
The given blank can be filled with latent content.
Explanation:
The latent content signifies the hidden meaning of a dream, that is, present behind the dream's literal content. On the basis of Freud, a dream's latent content signifies the hidden psychological meaning of the dream.
Freud considered that the content of the dreams is associated with fulfillment of wish and recommended that dreams possess two kinds of content. These are latent content and manifest content. The actual literal subject matter of the dream is known as the manifest content, while the underlying significance of these symbols is the latent content.