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Biology As/A Level Material

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  • One of the phases of mitosis where chromosomes line up across the equator of the spindle is called _____________.
    metaphase
  • A __________ cross is a genetic cross between two individuals differing in only one characteristic.
    monohybrid
  • __________ is the random process during which homologous chromosomes are shuffled and distributed into gametes during meiosis.
    Crossing over
  • The process of copying the genetic information in a molecule of DNA into a complementary strand of mRNA is called __________________.
    transcription
  • In humans, oxygen is transported in the blood primarily by __________, which binds to oxygen molecules.
    haemoglobin
  • Water moves from the soil to the roots through the process of __________, which occurs due to differences in water potential.
    Osmosis
  • The __________ is a membrane-bound organelle responsible for producing ATP in eukaryotic cells.
    Mitochondrion
  • During __________ division, the chromosome number is halved, leading to the formation of gametes.
    meiosis
  • The first stage of aerobic reaction at which the splitting of glucose molecules occurred is called __________.
    glycolysis
  • The regulation of blood glucose levels is controlled by the hormones __________ and __________, produced by the pancreas.
    insulin and glucagon
  • The building blocks of proteins are __________, which are linked together by peptide bonds.
    amino acids
  • The fluid mosaic model describes the structure of the cell membrane, where phospholipids form a __________, with proteins embedded within it.
    bilayer
  • The light-dependent reactions of photosynthesis occur in the __________ of the chloroplast.
    Thylakoid membrane
  • Enzymes are biological catalysts that speed up chemical reactions by lowering the __________ energy required for the reaction to occur.
    Activation Energy