60 years is three half life for the substance, so 40*1/2^3=5
Answer:
Promoter is located upstream and terminator is located downstream relative to the transcription start site.
Explanation:
Transcription start site is the site from where the transcription starts which is denoted by +1. The sequence of nucleotides which is present backword to them called upstream sequence and nucleotide sequence which is present in the forward direction of transcription start site are called downstream sequence.
Promoter sequences are present upstream to the transcription start site and are denoted with a minus sign and terminator sequence is present downstream to the transcription start site.
Answer:
The answers you have chosen are/should correct
Explanation:
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The correct answer is: prevent reception of a signal in a receiving neuron
Neurotransmitters are signal molecules or chemical messengers which transmit signals across a chemical synapse. Neurotransmitters send the signal, from one neuron (nerve cell) to another neuron, from neuron to muscle cell (motor plate), or from neuron to gland cell.
Drugs that bind to neurotransmitter’s receptor can have two effects on its action:
• Antagonists-they bind to receptor and thus prevent a neurotransmitter from binding to it
• Agonists-they bind to receptor and mimic the normal neurotransmitter (have the same effect as neurotransmitter).
Antlers are generally only found on male deer in other species of deer. Females with higher-than-normal testosterone levels, on the other hand, can grow antlers.
<h3>
Why Do Deer Grow Antlers?</h3>
Antlers are grown by male deer to lure female deer for mating. Females will be shown a display as the antlers are developing during mating season, with each male attempting to become the most dominating.
Deer utilize their antlers to protect themselves from predators and other deer. When deer attack each other, their antlers might lock together, forcing the deer to starve to death.
For more information regarding antlers, visit:
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