Out here in the stroma, a bunch of different enzymes use the carbon dioxide molecules and hydrogen ions made during the light dependent phase to assemble sugar fragments which are half of a glucose molecule (just 3 carbon atoms, instead of the 6 required to make a complete glucose molecule).
An alkane, by definition, only has single bonds. Even if your second diagram made sense (it doesn't for the reason above) it would not be an alkane at all because there is a double bond. Alkanes are a functional group. It's called alkil. As a functional group they have the generic formula R(CH2)nH.
Answer. The combination of a carbonyl functional group and an OH group makes the carboxyl groupA functional group composed of a carbonyl group and an OH group. . Molecules with a carboxyl group are called carboxylic acidsA molecule with a carboxyl group. .his type of molecule is called a ketoneA compound that has a carbonyl group in the middle of a carbon chain. . Despite the fact that aldehydes and ketones have the same carbonyl group, they have different chemical and physical properties and are properly grouped as two different types of compounds.