From the chemical formula, 1 formula unit of KAl (SO4)2.12H2O
encompasses 1 atom of Al = 4 * 2 atoms of O in KAl (SO4)2 + 12 atoms of O in
12H2O which is equal to 20 atoms of O.
So, if you have 1.3 × 10^21 Al atoms, you have 20 * 1.3 × 10^21 O atoms will
now be equal to 2.6 * 10^22 atoms of O.
Answer: B) Fungi convert nitrogen in dead plants into ammonium, which converts proteins into ammonia.
The unique identity of amino acid is that each amino acid is bonded to each central atom known as R-group.
Explanation:
Amino acids are nothing but a basic structure which has a central atom called the "alpha carbon atom". This 
carbon atom is bonded to an "amino group" (
), a "carboxyl group" (COOH) or a "hydrogen atom".
There are totally "20 types" of amino acids having a central atom bonded from the R-group. For example: When the R-group is hydrogen, then the amino acid is named glycine. Similarly, if it is attached to methyl group, then the amino acid is alanine. This makes the amino acids unique.
Answer:
1 g sucrose, 16.4 g Na₂HPO₄, 1.5 g (NH₄)₃PO₄, 0.02 g CaCO₃, KNO₃, water to 1 liter and autoclave. This recipe is for a DEFINED BROTH medium.
Explanation:
A medium is classified as <u>defined</u> when it is known its exact composition ( we know which are all its ingredients). In this case, the medium contains sucrose as carbon source, salts (Na₂HPO₄, (NH₄)₃PO4,CaCO₃, KNO₃) as nitrogen and minerals sources, and water. Undefined media commonly contains animal or plant extracts, whose exact composition is unknown (we cannot know which quantity of salts, aminoacids and other components contains the extract). Furthermore, the medium lack of agar, which is a component which is added to make solid the medium. Thus, this medium is liquid and it is a <u>broth</u>. It does not contain reducing substances (so it is not a reducing medium) neither antibiotics (so it is not a selective medium).
