The correct answer is: c. The DNA strand begins to unwind, separating the two strands.
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
i believe it is the last one
Answer:
C. medulla
Explanation:
The Medulla is the part of the brainstem that controls respiration ad circulation. The medulla is anterior and partly inferior to the cerebellum having sensory ad motor neurons running through it. This center controls the heart rate, breathing, sneezing, coughing, and blood pressure.
It is this part of the brain that controls what happens in my respiratory system, in response to the dust and fumes in the air I inhaled
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protein is a macromolecule and protein is made up of amino acids.
Can I get brainliest?