Role of Enzyme

Question 1

Some fungi produce enzymes that degrade waxes

Answer 1

Puccinia hordei

Question 2

enzyme is often secreted by the pathogenic organism.

Answer 2

Cutinases, cellulases, pectinases and lignases

Question 3

Species Example of Enzymes degrade cutin

Answer 3

appressorium forming fungi..

Question 4

fungal pathogens the produce Cutinase

Answer 4

Fusarium Penicillium spinulosum (rotting of leaves)

Question 5

Pectinase types

Answer 5

• Endopectinase : break pectin chains at random sites
• Exopectinase :only break terminal linkage

Question 6

Pectin degradation produce many diseases

Answer 6

soft rotting of tissues

Question 7

Pectin degradation results

Answer 7

liquefaction of pectic substances that hold plant cells together- lead to weakening of cell wall – leads to tissue maceration

Question 8

example for Pectinase utilize pathogen

Answer 8

-Brown rot (Monilinia fructicola) in plum
-Bacterium Erwinia sp.
-Psudomonas

Question 9

Enzyme degrading cellulose

Answer 9

Cellulases

Question 10

what is the result of degrading cellulose

Answer 10

Softening and disintegration of cell wall

Question 11

pathogen example that utilize Enzyme degrading for cellulose

Answer 11

-Corn stalk rot fungus Fusarium
-Rhizoctonia solani
-Fusarium moniliforme
-Sclerotium rolfsii

Question 12

what is Hemicelluloses

Answer 12

Complex mixture of polysaccharide polymers, Major constituent of secondary cell wall

Question 13

Hemicellulose polymers include

Answer 13

xyloglucan, glucomannan, galactomannans etc

Question 14

Enzyme degrading hemicellulose

Answer 14

Hemicellulases

Question 16

Depending on the monomer released after degradation hemicellulose they are called

Answer 16

-Xylanase
-Glucanase
-Galactanase
-Arabinase
-Mannase

Question 17

example pathogen that utilizes Enzyme degrading for hemicellulose

Answer 17

• Sclerotium rolfsii
• Sclerotinia sclerotiorum
• Diploidia viticola

Question 18

what is Lignin

Answer 18

Found in middle lamella, secondary cell wall of xylem vessels and the fibers that strengthen the plants

Question 19

species that can metabolize Lignin.

Answer 19

White rot fungi

Question 20

what lignin degrading enzymes and cause

Answer 20

soft rot cavities in wood they colonise

Question 21

example pathogen that utilizes Enzyme degrading for lignin

Answer 21

-Ceratocystis paradoxa (stem bleeding in coconut)
-Polyporus versicolor
-Some spp of Fusarium
-Phellinus spp.

Question 22

Enzymes degrading proteins are

Answer 22

Proteases or proteinases or peptidases

Question 23

example pathogen that utilizes Enzyme degrading for protein

Answer 23

Pyricularia oryzae,
Phytophtora infestans
Helminthosporium oryzae

Question 24

Starch degradation utilize species example.

Answer 24

Aspergillus spp

Question 25

enzyme that degrade starch

Answer 25

Amylases

Question 26

enzyme that degrade Lipids

Answer 26

Lipases

Question 27

example forpathogen that utilizes Enzyme degrading for lipids

Answer 27

Sclerotium rolfsii, Botrytis cinerea, Thielaviopsis basicola