Previous knowledge is absolutely important.
The most difficult at the beginning will be the physiological sciences, mainly Biochemistry (If you have good memory you should not have problems with Morphological sciences).
Review:
Chemistry:
General Chemistry:
The Properties of Atoms and Molecules
Chemical Bonds. Ionic bonds and covalent bonds.
Molecular interactions.
The secondary forces. Polar covalent bonds; dipole-dipole interactions; the hydrogen bond; London forces.
Chemical Change:
Chemical kinetics.
Chemical Equilibrium.
Acids and Bases
Buffers and Buffered solutions
Organic Chemistry:
Molecular and structural formulas ((in organic compounds)
Families of Organic compounds.
Stereoisomerism
Mathematics:
Decimal notation and scientific notation. Negative numbers and positive numbers.
Log scales: log evaluation, logs on calculators, log graphs, changing log to exponents, common log or base 10. Rules of logs: sums and differences of logs properties, log of exponents property, simplifying logs.
Systems of linear equations. Solving graphically. Algebraic substitution. Algebraic elimination. Sigmoidal, hyperbolic and other axis-coordinates graphics. Converting non-lineal relations in lineal relations
Physics:
The basis of thermodynamics: Types of thermodynamic systems; Thermodynamics of living organisms. Free energy changes, and endergonic and exergonic processes. Energetic coupling.
Relationship between flow of electrons and Energy.
Cell Biology:
Structure of the cell. Composition of protoplasm. Nucleus and cell organelles.
Structure of chromosome. DNA and RNA. Mitosis and meiosis.