All tasks in biology are divided into tasks in molecular biology and tasks in genetics. In molecular biology there are several subjects in which there are tasks: proteins, nucleinic acids, DNA code and power exchange.
Instruction
1. Solve problems of the subject "Proteins" by means of the following formula: m(min) = % a/b*100 where m(min) is the minimum molecular mass of protein, an is the atomic or molecular mass of a component, b is component percentage. The average molecular mass of one acid rest is equal to 120.
2. Calculate necessary sizes on the subject "Nucleinic Acids", following Chargaff's rules: 1. The amount of adenine is equal to amount of thymine, and guanine – to a tsitozin; 2. The quantity of the purinovy bases is equal to quantity of the pirimidinovy bases, i.e. And + = T+Ts. The distance between nucleotides is equal in a molecule DNA chain to 0.34 nanometers. Relative molecular the mass of one nucleotide is equal to 345.
3. On the subject "DNA Code" solve problems with the help of the special table of genetic codes. Thanks to it you learn what acid is coded by any given genetic code.
4. Calculate the answer necessary to you for tasks on the subject "Power Exchange" of the reaction equation. One of often meeting is: C6H12O6 + 6O2 → 6CO2 + 6H2O.
5. You find a solution of tasks on genetics of a special algorithm. First, define what genes are prepotent (And, C) and what recessive (a, b). The gene which sign is shown as in homozygous (AA, dd), and in a heterozygotic state is called prepotent (Aa, Bb). The gene which sign is shown only at a meeting of identical genes, i.e. in a homozygous state is called recessive. For example, peas plants with yellow seeds were crossed to peas plants with green seeds. The received peas plants all had yellow seeds. It is obvious that yellow color of seeds is the dominating sign. Write down the solution of this task so: And – the gene which is responsible for yellow color of seeds, and – the gene which is responsible for green color of seeds.P: AA x aaG: A, aF1: AaSushchestvuyut tasks of this kind with several signs, then one sign designate A or a, and the second B or b.