<span>(</span><span>A. specialized cells that perform specific functions)</span><span>
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Melanin is a pigment that is produced by cells known as melanocytes in the skin of most animals, including humans. ...
The correct answer is: b. It is free to bind to another promoter and begin transcription
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
• 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.
RNA polymerase is also released and can transcribe some other gene by binding to its promotor. RNA polymerase will transcribe just the genes whose products are needed at a particular moment.
Answer:
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Climate is a long-term model of weather in specific location or place. Thus, aspects of climate that are most important to forest ecosystem are the temperature and precipitation. Because. <span><span>1. </span> Temperature determines the adaptable and environmental influences such as the sunlight, the biotic community and especially the photosynthetic mechanisms of plants which are responsible for making its own food.</span> <span><span>2. </span><span> Precipitation. Water is vital in many aspects of plants since it is one of the materials needed for plant’s food-making process. </span></span>
