Why does hydrogen bond so tightly to oxygen during cellular respiration?(1 point)
Responses
It is electronegative, but oxygen is not.
It is electronegative, but oxygen is not.
It is more electronegative than oxygen.
It is more electronegative than oxygen.
It is less electronegative than oxygen.
It is less electronegative than oxygen.
It is not electronegative, but oxygen is.
It is more electronegative than oxygen.
Identify the byproduct of lactic acid fermentation.(1 point)
Responses
pyruvic acid
pyruvic acid
lactic acid
lactic acid
carbon dioxide
carbon dioxide
oxygen
lactic acid
When a reaction releases more energy than it uses, it is called(1 point)
Responses
emeritus
emeritus
lactic
lactic
exothermic
exothermic
catalyst
exothermic
The correct answer is: It is more electronegative than oxygen.
Explanation: Electronegativity is a measure of an atom's ability to attract electrons towards itself within a chemical bond. Oxygen is highly electronegative, meaning it has a strong pull on electrons. Hydrogen, on the other hand, is less electronegative.
During cellular respiration, hydrogen atoms are transferred from molecules such as glucose to oxygen molecules. This transfer of hydrogen involves the formation of hydrogen bonds between the hydrogen atoms and the oxygen atoms. Hydrogen bonds are relatively weak compared to covalent or ionic bonds, but they are still important in cellular processes.
The electronegativity difference between hydrogen and oxygen allows oxygen to attract the shared electrons in the covalent bond with hydrogen more strongly. This causes a partial positive charge on the hydrogen atom and a partial negative charge on the oxygen atom. As a result, the positively charged hydrogen atom is strongly attracted to the negatively charged oxygen atom, forming a tight hydrogen bond.
So, in summary, hydrogen bonds tightly to oxygen during cellular respiration because hydrogen is less electronegative (more positive) compared to oxygen, which is highly electronegative (more negative). This creates an attractive force between the two atoms, leading to the formation of strong hydrogen bonds.