IB Biology Crossword

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Across
  1. 2. unwinds the double helix and separates the two strands by breaking hydrogen bonds
  2. 3. synthesis of polypeptides on ribosomes
  3. 4. surface area to ______ is important in the limitation of cell size
  4. 6. this model of membrane structure was accepted by most biologists for about 30 years, but was later falsified
  5. 8. can be suitable for therapeutic uses
  6. 9. the synthesis of complex molecules from simpler molecules including the formation of macromolecules from monomers by condensation reactions
  7. 10. states that mitochondria were once free-living prokaryotic organisms that had developed the process of aerobic cell respiration
  8. 17. a double helix made of two antiparallel strands of nucleotides linked by hydrogen bonding between complementary base pairs
  9. 19. the amino acid sequence of polypeptides is coded for by _____
  10. 20. formed by condensation from three fatty acids and one glycerol
  11. 23. divide by binary fission
  12. 25. this model shows the components of a membrane, including phospholipids, integral proteins, peripheral proteins, and cholesterol
  13. 26. electron microscopes have a much _____ resolution than light microscopes
  14. 27. water is able to move in and out of most cells freely
  15. 28. unicellular organisms carry out at least ____ functions of life
Down
  1. 1. if an enzyme's structure becomes irreversibly altered by certain conditions, this is known as
  2. 5. reduces membrane fluidity and permeability to some solutes in mammalian membranes
  3. 6. specialized tissues can develop by cell ________ in multiicellular organisms
  4. 7. processes proteins brought in vesicles from the rER
  5. 11. DNA replication is referred to as being _________
  6. 12. the division of the nucleus into two genetically identical daughter nuclei
  7. 13. this states that cells are the fundamental building blocks of all living organisms
  8. 14. a sequence of three bases on the mRNA
  9. 15. have a compartmentalized cell structure
  10. 16. substances attracted to water
  11. 18. the synthesis of mRNA copied from the DNA base sequences by RNA polymerase
  12. 21. the notation -COOH represents which group
  13. 22. substances that are part hydrophilic and part hydrophobic
  14. 24. the substances that enzymes convert into products in biochemical reactions
  15. 25. can be saturated, monosaturated, or polysaturated