Molar mass of C is 12.01g/mol.
Molar mass of H is 1.01g/mol.
Molar mass of O is 16.00g/mol.
If we have 19 atoms of C, 38 atoms of H, and 1 atom of O, then we have:
19*12.01+38*1.01+1*16.00=282.57g/mol
282.57g/mol is the molar mass of the pheromone molecule.
Supposing that "<span>1.8 10-12 g" is 1.8*10^(-12)g then, this quantity of pheromones, shoud be divided by the molar mass of the pheromone molecule:
1.8*10^(-12)/282.57g/mol=6.37*10^(-15)moles
Using now Avogadro's number of molecules in 1mol (6.02*10^(23)) it is possible to know how many molecules are there in this pheromone quantity.
</span>6.02*10^(23)/6.37*10^(-15)=9.45*10^(37)molecules
So, in this quantity of the pheromone there are approximately 9.45*10^(37)molecules of it.
Huntington's disease is a hereditary condition in which your brain's nerve cells gradually break down. It affects your physical movements, emotions, and cognitive abilities. There is no cure at the moment, although there are ways to cope with this disease as well as it's symptoms. Genetic testing can definitively diagnose this condition, it may also help you decide whether or not to have children. Some people don't want to risk their children having this defective gene. Symptoms that may occur as the disease progresses include, uncontrolled twitching, difficulty walking, trouble swallowing and speaking, confusion, memory loss, personality changes, speech changes and decline in cognitive abilities. Sorry about the long post! Hope this helps ya'!
According to the behaviorist perspective, an organism learns the association between two stimuli because they are paired together, not because the organism knows that one stimulus will follow another and this is true because behaviorist relate to the study of human/animal behavior to learn.
The answer should be “D” :)
The instructions for the translation and the protein synthesis are found in the genetic code stored on the DNA molecule -this is the correct answer. The DNA is a nucleic acid that stores all the genetic information but it's not very efficient -over 95 % of it is non-coding, so it doesn't code for anything.
