Prac 2 Flashcards
Define Cytology
is the science that deal with cell.
Define The cell
is the unit of the structure and function.
What do all organisms consist of
All organisms consist of one or more cells.
What are the cell contents which we are concerned in Pharmacognosy
are those which can be identified in vegetable drug by microscopic examination or by chemical and physical tests
How is cell contents identified in drugs
By microscopic examination or by chemical and physical tests
What do these cell contents we are concerned with in pharmacognosy represent
These cell contents represent either food storage products e.g. starch
or by products of metabolism and these include:
carbohydrates, calcium oxalate, calcium carbonate
fix oil, volatile oil
alkaloids, glycosides
protein, fats, purines, gums, mucilage, tannins and silica
Define the starch functionally and scientifically
Starch, or Amylum : is a complex carbohydrate that exists in
many foods, including grains, vegetables, and fruits.
Starch : is a white, granular, organic chemical that is produced by all green plants. Starch is a soft, white, tasteless powder that is insoluble in cold water, alcohol, or other solvents. The basic chemical formula of the starch molecule is (C6H10O5).
Mention an alternative name of starch
Amylum
Starch properties
White, granular, soft, tasteless powder. that is insoluble in cold water, alcohol, or other solvents
The basic chemical formula of the starch molecule is
(C6H10O5)
With which substance we identify starch and which colour is shown
with iodine, Blue color
Starch is a mixture of
two polymers: amylose and amylopectin.
Percent of amylose and amylopectin in natural starch
Natural starches consist of about 10%–30% amylose and 70%–90% amylopectin
starch occurs in various organs of plants in the form of
starch occurs in granules of varying size in almost all organs of plants
Starch granules found in which parts of the plant?
found in
fruits, seeds, rhizomes and roots
