Terpenes are a large and diverse class of organic compounds produced by plants and some insects. They serve protective functions for producing organisms and are also important biosynthetic building blocks. Terpenes are derived from isoprene units that can be linked together in linear chains or rings to form compounds of varying sizes, including hemiterpenes, monoterpenes, sesquiterpenes, and larger polyterpenes. The mevalonate pathway produces the basic terpene precursors isopentenyl pyrophosphate and dimethylallyl pyrophosphate from acetyl-CoA in most organisms.

2. Kulsoom pirjan

3. biosynthetic pathway of
terpenes
And enymes with multiple
fuctions

5. • Terpenes are a large and diverse class of organic
compounds, produced by a variety of plants, particularly
conifers.
• some insects such as termites or swallowtail butterflies,
which emit terpenes from their osmeteria. They are often
strong-smelling.

8. • They may protect the plants that produce them by
deterring herbivores and by attracting predators and
parasites of herbivores.
• Many terpenes are aromatic hydrocarbons and thus may
have had a protective function.

9. • The name "terpene" is derived from the word
"turpentine".
• In addition to their roles as end-products in many
organisms, terpenes are major biosynthetic building
blocks within nearly every living creature.
• Steroids, for example, are derivatives of the triterpene
squalene.

10. • When terpenes are modified chemically, such as by
oxidation or rearrangement of the carbon skeleton, the
resulting compounds are generally referred to as
terpenoids.
• Some authors will use the term terpene to include all
terpenoids. Terpenoids are also known as isoprenoids.

11. • The difference between terpenes and terpenoids is that
terpenes are hydrocarbons, whereas terpenoids contain
additional functional groups.
• Isoprene structure

13. • Terpenes are derived biosynthetically from units of isoprene,
which has the molecular formula C5H8. The basic molecular
formulae of terpenes are multiples of that, (C5H8)n where n is
the number of linked isoprenes units.
• The isoprene units may be linked together "head to tail" to form
linear chains or they may be arranged to form rings. One can
consider the isoprene unit as one of nature's common building
blocks.

15. • Active forms of terpenes, isopentenyl pyrophosphate
(IPP or also isopentenyl activated fordiphosphate) and
dimethylallyl pyrophosphate (DMAPP or also
dimethylallyl diphosphate), are the components in the
biosynthetic pathway. IPP is formed from acetyl-CoA
• Through differnts biosynthetic pathways such as
mevalonic acid in the HMG-CoA reductase pathway.

16. Isopentenyl pyrophosphate
Dimethylallyl pyrophosphate

17. • Hemiterpenes
• Monoterpenes
• Sesquiterpenes
• Diterpenes
• Sesterterpenes
• Triterpenes
• Sesquarterpenes

18. • Tetraterpenes
• Polyterpenes

19. • consist of a single isoprene unit.
Isoprene itself is considered the only
hemiterpene, but oxygen-containing
derivatives such as prenol and
isovaleric acid are hemiterpenoids.

20. • consist of two isoprene units and have the
molecular formula C10H16. Examples of
monoterpenes and monoterpenoids
include geraniol, limonene, terpineol and
myrcene.

21. • consist of three isoprene units and have
the molecular formula C15H24. Examples
of sesquiterpenes and sesquiterpenoids
include humulene, farnesenes, farnesol.

22. • are composed of four isoprene units and
have the molecular formula C20H32. They
derive from geranyl pyrophosphate.
Examples of diterpenes and diterpenoids
are cafestol
• Diterpenes also form the basis for
biologically important compounds such as
retinol.

23. • Sesterterpenoids, 5 isoprene units (25C)
• Triterpenoids, 6 isoprene units (30C)
(e.g. sterols)
• Tetraterpenoids, 8 isoprene units (40C)
(e.g. carotenoids)
• Polyterpenoid with a larger number of isoprene
units.

26. • is an important cellular metabolic pathway
present in all higher eukaryotes and many
bacteria.
• It is important for the production of
dimethylallyl pyrophosphate (DMAPP) and
isopentenyl pyrophosphate(IPP)

27. • Many organisms manufacture terpenoids through
the HMG-CoA reductase pathway, which also
produces cholesterol. The reactions take place in
the cytosol. The pathway was discovered in the
1950s.
• The mevalonate pathway or HMG-CoA
reductase pathway or mevalonate-dependent
(MAD) route or isoprenoid pathway , MVA having
formula C6H12O4

28. • which serve as the basis for the biosynthesis of
molecules used in processes as diverse as
terpenoid synthesis
• cell membrane maintenance, hormones, protein
anchoring
and It is also a part of steroid biosynthesis.

32. • Enzymes are biological molecules (proteins) that
act as catalysts and help complex reactions
occur everywhere in life. Let's say you ate a
piece of meat. Proteases would go to work and
help break down the peptide bonds between the
amino acids.

34. • Enzymes are macromolecular biological
catalysts ,Enzymes accelerate, or catalyze,
chemical reactions.
• The molecules at the beginning of the process
are called substrates and the enzyme converts
these into different molecules, called products

36. • A seed contains an embryo plant and a stored
food supply provided for the embryo to develop.
• Germination of the seeds starts with the uptake
of water. As the cotyledons take in the water,
they swell and burst the seed coat (testa). Once
the seeds have enough water, enzymes in the
cotyledons become active

38. • Amylase begins to break down stored starch
molecules to maltose.
• Proteases break down protein molecules into
amino acids.
• Lipase breaks down oil into fatty acids and
glycerol. Maltose, amino acids, glycerol and fatty
acids are soluble, they dissolve in the absorbed
water, and diffuse to the embryo plant, to be
used for food for growth and development.