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Summary - Life Sciences (Biology) R50,00
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Summary - Life Sciences (Biology)
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There are mind maps for the DNA, protein synthesis, meiosis, genetic inheritance, nervous system, reproductive strategies and plant responses to the environment sections. These are one-page summaries designed to simplify difficult terms and processes with only the very key points. They include k...

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  • November 12, 2024
  • 6
  • 2024/2025
  • Summary

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DNA RNA

RNA = ribonucleic acid
DNA = deoxyribonucleic acid
Types of RNA: messenger RNA (mRNA
DNA has a double-stranded transfer RNA (tRNA); ribosomal RNA (rR
helix structure.
Each strand is made up of
nucleotides
Weak hydrogen bonds join the
two strands between
complementary nucleotides
Nucleotide:



DNA & PROTEIN SYNTH


OTHER IMPORTANT FACTS
Nitrogenous bases are
complementary and always Three nitrogenous bases next to each othe
make up one:

, PROCESS IMPORTANCE

Interphase: DNA replication takes
To go from diploid somatic cells to haploid
place
(gamete formation so that sexual reproduc
Meiotic Division 1 take place and that when fertilization occ
Remember I-PMAT for the order zygote has a normal chromosome num
Prophase I (P for Pair): Nuclear If meiosis does not occur then gametes can
membrane disappears. Homologous be formed and sexual reproduction can’t o
chromosomes pair up. Crossing over
occurs To increase genetic variation (through cro
Metaphase I (M for Middle): over and random arrangement)
Homologous chromosome pairs line
up along the equator.
Anaphase I (A for Apart):
Chromosomes are pulled apart to
opposite poles MEIOSIS
Telophase I (T for Terminate): Nuclear
membrane reforms. Cytokinesis
occurs to produce two daughter
cells. MEIOSIS VS MITOSIS
Meiotic Division 2


Prophase II: Nuclear membrane

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