Answer:
A measure of how much water vapor there is in the air.
Explanation:
Dampness, especially that of the air.
The amount of water vapour in the air.
Hope it will help you :))
The statement that is true about polar covalent bonds is that the electrons are shared unequally. Thus, the correct option for this question is D.
<h3>What is a Polar Covalent bond?</h3>
A Polar covalent bond may be characterized as a type of covalent bond in which the electron density is unevenly shared between the two bonded atoms, due to a difference in electronegativity or due to inductive effects.
According to the context of this question, in a polar covalent bond, the electrons are unequally shared by the atoms and spend more time close to one atom than the other.
This is because of the unequal distribution of electrons between the atoms of different elements, slightly positive (δ+) and slightly negative (δ–) charges develop in different parts of the molecule.
Therefore, the statement that is true about polar covalent bonds is that the electrons are shared unequally. Thus, the correct option for this question is D.
To learn more about Polar covalent bonds, refer to the link:
brainly.com/question/3978603
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Answer:
In prokaryotes like E.coli, the structural proteins with related function are located in a single transcriptional unit called operon.
Explanation:
All the genes within a promoter are under the control of single promoter i.e they are controlled simultaneously. Usually the product of all the structural genes within a operon are needed at the same time.
There is a regulatory region in the operon which include promoter region and the regions where transcription factors binds. RNA polymerase binds to the promoter region for transcribing the structural genes.
In lac operon, there are three structural genes : lacZ - encodes for beta galactosidase, lacY - encodes for permease and lacA - encodes for trans-acetylase.
Repressor is a transcription factor which binds to the regulatory region called operator. Operator lies between the promoter and the transcription start site. Binding of repressor to the operator site blocks the RNA polymerase from transcribing the structural genes.
Inducer is also a regulatory molecule which can activate or repress the transcription. It does so by binding to activator and repressor. In lac operon allolactose serves as inducer. When allolactose binds to repressor, it prevents its binding to the operator site and thus RNA polymerase successfully transcribes the structural genes.
Thats the other name of it hope it helped