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.
1. Cell starts into mitosis phase of the cell cycle.
2. Helicase begins to break the hydrogen bonds between the nitrogen bases. (The double helix has to be unwound in order to expose the nucleotides)
3. DNA polymerase attach the free-floating nucleotides to the exposed nitrogen bases. (this allows a new DNA strand to be made on the existing one)
4. Free floating nucleotides pair up with exposed nitrogen bases (this is what really builds the new strand, based around the template strand)
5. Two new molecules of DNA are created
Statements:
Adenine
Cytosine (Car in the Garage, Apple in a Tree is a good trick to know how they pair)
DNA
Replication
Double helix
Answer:
Correct answer is ''e'' the sympatetic nervows system
Explanation:
THE ENDOCRINE SYSTEM How does the endocrine orchestra work? 1- Nervous Stimuli to the Hypothalamus production of releasing (stimulatory) or inhibitory hormones, transported via a portal system of vessels to the anterior pituitary gland 2- Anterior Pituitary Gland pituitary trophic hormones 3- Pituitary trophic hormones stimulate Peripheral Endocrine Glands production of peripheral hormones 4- Hormone/Receptor Interactions in target organs hormone actions 5- Peripheral hormones exert Negative Feedback Mechanisms supression of hypothalamic & pituitary hormones.
Answer:
carbohydrate chain
Explanation:
Cholesterol is more rigid than some of the other lipids in the membrane. Cholesterol keeps the fatty-acid tails of the phospholipids bilayer from sticking together, which contributes to the fluidity of the plasma membrane. The membrane would become rigid. Transport protein move needed substances or waste materials through the plasma membrane
. Carbohydrate defines the cell characteristics and help cells identify chemical signals.
