Natural Products

Pregunta 1 de 13

1

In specimen collection the plant must be dried and kept sterile to minimise damage

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 2 de 13

1

Which of the following is best to aid identification of the natural product/plant

Selecciona una de las siguientes respuestas posibles:

plant handbook
flora or field guide
herbarium

Explicación

Pregunta 3 de 13

1

macerated leaves are treated with chemicals that gradually decrease in polarity to extract chemicals

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 4 de 13

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

General screening bioassays are ( simple, complex ), ( inexpensive, expensive ) and used for ( rapid screening, specific enzyme screening ) of extracts

Explicación

Pregunta 5 de 13

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

specialised screening bioassays are ( subcellular, multicellular ) assays directed at ( specific, broad spectrum ) enzymes or receptors. Compounds working by mechanisms unrelated to the assay are likely to be missed.

Explicación

Pregunta 6 de 13

1

which of the following is FALSE

Selecciona una de las siguientes respuestas posibles:

Brine shrimp lethality tests are used to determine cytotoxicity (potential antitumour) of extracts
crown gall tumour inhibition tests give a fairly accurate prediction of in vivo murine antileukemic activity
starfish or sea urchin assays are used to investigate in vivo antileukemic activity
agar dilution streak assay means up to 7 microorganisms can be screened simultaneously on a petri dish
microtitre plates allow testing of 3 dilutions of one or two extracts against up to 24 microorganisms

Explicación

Pregunta 7 de 13

1

crown gall tumour inhibition tests use potatoes to measure inhibition of growth

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 8 de 13

1

which 3 do starfish or sea urchin assays allow detection of?

Selecciona una o más de las siguientes respuestas posibles:

dna and rna synthesis inhibitors
mRNA substrate inhibitors
microtubule assembly inhibitors
protein synthesis inhibitors

Explicación

Pregunta 9 de 13

1

Haz click en el punto naranja y selecciona la respuesta correcta

which best applies to an agar dilution streak assay?

Explicación

Pregunta 10 de 13

1

Haz click en el punto naranja y selecciona la respuesta correcta

Which tlc staining technique is used to test acidic groups

Explicación

Pregunta 11 de 13

1

which one of the following is not considered in NP isolation or synthesis

Selecciona una de las siguientes respuestas posibles:

source - availability
environmental and local impact
cost
complexity of novel structures
diluent needed

Explicación

Pregunta 12 de 13

4

Selecciona la opción correcta de los menús desplegables para completar el texto.

What are the stages of natural product processing? ( Specimen, Taxonomy, molecules, structure ) collection, establishing ( taxonomy, specimen, molecules, therapeutics ), extracting possible active molecules, using ( screening, showing, therapeutic, herbariums ) techniques to evaluate therapeutic activity, identifying and ( isolating, burning, melting, releasing ) the structure responsible for the activity, using organic synthesis

Explicación

Pregunta 13 de 13

2

Selecciona la opción correcta de los menús desplegables para completar el texto.

a range of techniques are used to isolate active compounds (fractionation). these include ( TLC, LTC, MSMS ), column chromatography, ( HPLC, ELISA, SPE ) and combinations such as HPLC/MS

	Creado por Sam Watkins hace más de 10 años

a quiz on natural product extraction and tests

Natural Products

Pregunta 1 de 13

In specimen collection the plant must be dried and kept sterile to minimise damage

Selecciona uno de los siguientes:

Explicación

Pregunta 2 de 13

Which of the following is best to aid identification of the natural product/plant

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 13

macerated leaves are treated with chemicals that gradually decrease in polarity to extract chemicals

Selecciona uno de los siguientes:

Explicación

Pregunta 4 de 13

Selecciona la opción correcta de los menús desplegables para completar el texto.

General screening bioassays are simple complex( simple, complex ), inexpensive expensive( inexpensive, expensive ) and used for rapid screening specific enzyme screening( rapid screening, specific enzyme screening ) of extracts

Explicación

Pregunta 5 de 13

Selecciona la opción correcta de los menús desplegables para completar el texto.

specialised screening bioassays are subcellular multicellular( subcellular, multicellular ) assays directed at specific broad spectrum( specific, broad spectrum ) enzymes or receptors. Compounds working by mechanisms unrelated to the assay are likely to be missed.

Explicación

Pregunta 6 de 13

which of the following is FALSE

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 13

crown gall tumour inhibition tests use potatoes to measure inhibition of growth

Selecciona uno de los siguientes:

Explicación

Pregunta 8 de 13

which 3 do starfish or sea urchin assays allow detection of?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 13

Haz click en el punto naranja y selecciona la respuesta correcta

which best applies to an agar dilution streak assay?

Explicación

Pregunta 10 de 13

Haz click en el punto naranja y selecciona la respuesta correcta

Which tlc staining technique is used to test acidic groups

Explicación

Pregunta 11 de 13

which one of the following is not considered in NP isolation or synthesis

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 13

Selecciona la opción correcta de los menús desplegables para completar el texto.

Explicación

Pregunta 13 de 13

Selecciona la opción correcta de los menús desplegables para completar el texto.

a range of techniques are used to isolate active compounds (fractionation). these include TLC LTC MSMS( TLC, LTC, MSMS ), column chromatography, HPLC ELISA SPE( HPLC, ELISA, SPE ) and combinations such as HPLC/MS

Explicación

General screening bioassays are ( simple, complex ), ( inexpensive, expensive ) and used for ( rapid screening, specific enzyme screening ) of extracts

specialised screening bioassays are ( subcellular, multicellular ) assays directed at ( specific, broad spectrum ) enzymes or receptors. Compounds working by mechanisms unrelated to the assay are likely to be missed.

a range of techniques are used to isolate active compounds (fractionation). these include ( TLC, LTC, MSMS ), column chromatography, ( HPLC, ELISA, SPE ) and combinations such as HPLC/MS