Antimicrobial Properties of Medicinal Plants Quiz

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What is the unit used to express the Minimum Inhibitory Concentration (MIC) values for the extracts?

kg

μg/ml

g

mg/ml (correct)

Which plant species had the highest inhibitory zone diameter for pneumoniae?

Securidaca longipedunculata (correct)

Andrachne aspera

Achyranthes aspera

Albizia anthelmintica

Which plant had the lowest Minimum Inhibitory Concentration (MIC) value for pneumoniae?

Pneumoniae Dichrostachys cinerea

Achyranthes aspera

Albizia anthelmintica

Psydrax shimperiana (correct)

What was the minimum inhibitory concentration (MIC) recorded by Andrachne aspera against E. faecalis?

1.0 ± 0.0 mg/ml Signup and view all the answers

Which plant species exhibited the highest antibacterial activity against Gram-negative bacteria?

Achyranthes aspera Signup and view all the answers

What are the positive control drugs used for Gram-positive and Gram-negative bacteria, respectively?

Erythromycin and ciprofloxacin Signup and view all the answers

Which plant species contained a strong concentration of Polyphenols and Flavonoids according to the text?

Andrachne aspera Signup and view all the answers

What is an essential step suggested for the further investigation of the medicinal plant species mentioned?

Conducting safety tests Signup and view all the answers

Which plant species had the highest inhibitory zone diameter for longipedunculata?

Securidaca longipedunculata Signup and view all the answers

Which term is used to describe the zone where bacterial growth is inhibited by medicinal plant extracts?

Inhibitory zone diameter Signup and view all the answers

What can be isolated for the development of alternative drugs from the medicinal plant species mentioned?

Bioactive secondary metabolites Signup and view all the answers

What is a crucial part of treating bacterial infections, as mentioned in the text?

Administering antibiotics specifically targeting responsible organisms Signup and view all the answers

What do the findings indicate about the relationship between the diameter of the inhibitory zone and concentrations of crude extracts?

A positive correlation Signup and view all the answers

Why do differences in the size of the mean inhibition zone diameter occur among tested bacterial strains exposed to the same concentration of plant extracts?

Differences in bioactive secondary metabolites Signup and view all the answers

What is a likely reason for the lower mean zone of inhibition observed in gram-negative bacteria compared to gram-positive bacteria?

Presence of protective outer membrane Signup and view all the answers

How do gram-negative bacteria selectively block the entry of antibiotics?

Through their protective outer membrane Signup and view all the answers

Which factor might contribute to differences in antibacterial activities among selected medicinal plants?

Types and concentrations of bioactive secondary metabolites Signup and view all the answers

What is one likely explanation for the low antibacterial activities of selected medicinal plants against gram-negative bacteria?

Protective outer membrane in gram-negative bacteria Signup and view all the answers