MIDTERM 11 - Alkaloids

Question 1

Derived from amino acid and share a heterocyclic ring with nitrogen (Types of alkaloids)

Answer 1

True alkaloids

Question 2

Compounds which the N atom is derived from amino acids and not part of heterocyclic ring (Types of alkaloids)

Answer 2

Proto/amino alkaloids

Question 3

Cocaine, quinine, and morphine are examples of __________

Answer 3

True alkaloids

Question 4

Hordenine, mescaline, and yohimbine are examples of ___________

Answer 4

Proto/amino alkaloids

Question 5

The basic carbon skeletons of which are not derived from amino acid (Types of alkaloids)

Answer 5

Pseudo alkaloids

Question 6

Are non alkaloids that give a false positive reaction with alkaloidal reagents (Types of alkaloids)

Answer 6

False alkaloids

Question 7

Coniine, capsaicin, ephedrine, caffeine, and theobromine are examples of __________

Answer 7

Pseudo alkaloids

Question 8

Most alkaloids are __________, only a few alkaloids are amorphous (like emetine)

Answer 8

Crystalline solid

Question 9

Majority of alkaloids are __________

Answer 9

Colorless

Question 10

Colchicine and berberine are color __________

Answer 10

Yellow

Question 11

Canadine is color __________

Answer 11

Orange

Question 12

Salts of sanguinarine are color _________

Answer 12

Copper red

Question 13

Alkaloidal bases and salts are soluble in __________

Answer 13

Alcohol

Question 14

Most of the alkaloids ends in __________

Answer 14

“-ien”

Question 15

All alkaloids are solids, except __________, __________, __________, and __________ (CANS)

Answer 15

Coniine, Arecoline, Nicotine, Sparteine

Question 16

Derived from Coniium maculatum (poison hemlock)

Answer 16

Coniine

Question 17

Cocaine (Stimulant, hallucinogen, or depressant)

Answer 17

Stimulant

Question 18

Ephedrine (Stimulant, hallucinogen, or depressant)

Answer 18

Stimulant

Question 19

Caffeine (Stimulant, hallucinogen, or depressant)

Answer 19

Stimulant

Question 20

Tropane alkaloids (Stimulant, hallucinogen, or depressant)

Answer 20

Hallucinogen

Question 21

Mescaline (Stimulant, hallucinogen, or depressant)

Answer 21

Hallucinogen

Question 22

Ergot alkaloids (Stimulant, hallucinogen, or depressant)

Answer 22

Hallucinogen

Question 23

Morphine (Stimulant, hallucinogen, or depressant)

Answer 23

Depressant

Question 24

Codeine (Stimulant, hallucinogen, or depressant)

Answer 24

Depressant

Question 25

Heroin (Stimulant, hallucinogen, or depressant)

Answer 25

Depressant

Question 26

Nicotinic precursor

Answer 26

Nicotine

Question 27

Purine precursor

Answer 27

Caffeine

Question 28

Some alkaloids are synthesized from __________ along mevalonic acid pathway

Answer 28

Terpenes

Question 29

Atropine is an example of __________

Answer 29

True alkaloid

Question 30

Ephedrine is an example of __________

Answer 30

Protoalkaloid

Question 31

Caffeine is an example of __________

Answer 31

Pseudo alkaloid

Question 32

Reddish-brown/Brown ppt (Chemical test for alkaloids)

Answer 32

Wagner’s test

Question 33

Wagner’s test (Positive result)

Answer 33

Reddish-brown/Brown ppt

Question 34

White/Cream color ppt with true alkaloids (Chemical test for alkaloids)

Answer 34

Mayer’s test

Question 35

Mayer’s test (Positive result)

Answer 35

White/Cream color ppt with true alkaloids

Question 36

Yellow ppt with true alkaloids (Chemical test for alkaloids)

Answer 36

Hagger’s test

Question 37

Hagger’s test (Positive result)

Answer 37

Yellow ppt with true alkaloids

Question 38

Reddish brown ppt/Orange yellow ppt/ Orange ppt (Chemical test for alkaloids)

Answer 38

Dragendorff’s test

Question 39

Dragendorff’s test (Positive result)

Answer 39

Reddish brown ppt/Orange yellow ppt/ Orange ppt

Question 40

Are alkaloids that arise by inclusion of a basic nitrogen at some point in the steroid molecule; C27 compounds having cyclopentanophenanthrene moiety

Answer 40

Steroidal alkaloids