Answer:
In order to find out whether the oxygen in CO2 comes from the sugar or from oxygen gas, we will perform radioactive labeling one by one on oxygen of sugar and oxygen of gas.
After this, we will observe the results and find that labelling of oxygen done in case of sugar produces radio labelled CO2 whereas labelling done in atoms of oxygen gas did not give a radio labelled CO2.
From this, it is concluded that in the process of cellular respiration ( oxidation of sugar to give energy in the form of ATP while producing water and CO2 as waste products), CO2 comes from the sugar molecule and not from oxygen gas.
<span>A polypeptide is a single linear chain of many amino acids, held together by amide bonds. A protein consists of one or more polypeptides (more than about 50 amino acids long). An oligopeptide consists of only a few amino acids (between two and twenty). </span>
<span />A polypeptide
because a glucose molecule is to large to pass through a cell membrane cells assist glucose diffusion through facilitated diffusion and two types of active transport.
There are some characteristics that scientists considered before they classify organisms, these characteristics include the following:
1. The number of cell present in the organism: on the basis of number of cell, an organism can be classified as a prokaryote or an eukaryote.
2. Mode of feeding: an organism can be categorized as an autotroph or a heterotroph based on the way it obtains its food.
3. Mode of reproduction: an organism can be classified as sexual or asexual based on the method it uses to reproduce its offspring.