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Wednesday - Writing retreat 2025 Flashcards | StudBud
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Wednesday - Writing retreat 2025
Wednesday - Writing retreat 2025
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Flashcards
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Practice quiz
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Questions
20
Answers
1
Bulbine frutescens
has both orange AND yellow flower variants
True
False
2
Gas Chromatography is the preferred method for analyzing non-volatile plant compounds like flavonoids.
True
False
3
Which of the following are considered secondary plant metabolites?
Terpenoids
Alkaloids
Flavonoids
Proteins
4
The term "crude drug" in pharmacognosy refers to chemically pure compounds isolated from plants.
False
True
5
Tu Youyou won the 2015 Nobel Prize in Physiology or Medicine for her discovery of artemisinin (antimalarial)
False
True
6
Which plant produces morphine?
Poppy
Cannabis
Echinacea
Mint
7
Green (unfermented) Rooibos contains higher levels of the bioactive molecule Aspalathin
False
True
8
What is the typical particle size of packing material in a UPLC column
3.5ųm
1.7ųm
3ųm
5ųm
9
Alkaloids are nitrogen containing secondary plant metabolites
False
True
10
Due to skin irritant properties, essential oils are
not
used in the cosmetic industry
False
True
11
Combining different plants in poly herbal formulations always results in synergy
False
True
12
Which analytical technique is
MOST
commonly used for identification and quantification of compounds in plant extracts?
Ultraviolet-visible (UV-Vis) spectroscopy
Nuclear Magnetic Resonance (NMR) spectroscopy
Enzyme-Linked Immunosorbent Assay (ELISA)
High-Performance Liquid Chromatography (HPLC)
13
From which Legume was the oral anti-diabetic drug, metformin, isolated?
Entada elephantina
Elephantorrhiza elephantina
Galega officinalis
Sutherlandia frutescens
14
In which year did Prof Alvaro obtain his PhD?
1995
1999
2005
2001
15
Which compound is antimalarial?
Piperine
Quinine
Thymol
Curcumin
16
Which member of the writing retreat team would like to be a farmer?
Ramaesela Mathabatha
Kabelo Mohlamonyane
Nsikayezwe Ncube
Busisiwe Maphanga
17
Which one of the following retreat members aspired to pursue a career in Arts?
Efficient Ncube
Mokgadi Mphahlele
None of these
Mianda Sephora
18
What does the abbreviation PDA refer to in the case of UPLC-PDA?
Photodiode array
Pulse dispersion analyser
Public displays of affection
Photodensity analyser
19
What is the main bioactive compound in green tea?
Caffeine
Lutein
Catechin
Resveratrol
20
Which of the following techniques are essential for validating the purity and structure of isolated phytochemicals?
Polymerase Chain Reaction (PCR)
Mass Spectrometry (MS)
Fourier-Transform Infrared Spectroscopy (FTIR)
Thin-Layer Chromatography (TLC)