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No, an oxygen atom is O but oxygen exists as a molecule O2. A macromolecule is a large one. An example of a macromolecule would be DNA or a protein or a polymer. Oxygen does not fit this category.
Protein(s), of course.
Corn has more than one macromolecule: Carbon, Nitrogen, Oxygen and Hydrogen are the major nutrients that make up a corn plant and the macromolecules of that plant.
Lactose is not a macromolecule. It is a disaccharide, that is one molecule of lactose is formed by the elimination of water between two simple sugar molecules, in this case galactose and glucose. Lactose can be made to link up into medium chain molecules, but this is a fairly random process and produces a mixture of products which are not digestible.
A nucleic acid.
Production would cease.
The other senses would become more powerful.
The species would die out - as there would be no way to reproduce.
No, an oxygen atom is O but oxygen exists as a molecule O2. A macromolecule is a large one. An example of a macromolecule would be DNA or a protein or a polymer. Oxygen does not fit this category.
The cell organelles couldn't be contained in one place and the cell would literally fall apart.
Firstly, we would not be alive if there was an eco-system member missing because every one is imporant. For example, trees. If they were missing we can't live because it provides us oxygen.
If an enzyme in a sequence of enzyme-controlled reactions is missing or defective then the process will stop at that point. So respiration could proceed until it reached the reaction which needed the missing or defective enzyme at which point it would stop.
If an enzyme in a sequence of enzyme-controlled reactions is missing or defective then the process will stop at that point. So respiration could proceed until it reached the reaction which needed the missing or defective enzyme at which point it would stop.
The plant will not (can not) grow.
If a component of photosynthesis is missing, the plant cannot photosynthesis (which means no food) and in turn, dies.
It would cause the reaction to occur at a much slower rate, because all enzymes do is speed up the reaction.
It depends in what the stage of development what will happen. Early on the result will be death. Later on, it may be a missing or deformed part.