#Question id: 10805
#Unit 6. System Physiology – Plant
Breakdown of cyanogenic glycosides in plants is a two-step enzymatic process, the enzymes necessary to hydrolyze the sugar and liberate HCN is
#Question id: 10806
#Unit 6. System Physiology – Plant
HCN is a fast-acting toxin that inhibits
#Question id: 10807
#Unit 6. System Physiology – Plant
Cyanogenic Glycosides and Glucosinolates are nitrogen
containing secondary metabolites in plants. Following are some statements
regarding the action of Cyanogenic Glycosides and Glucosinolates;
a) Cyanogenic Glycosides release the poison hydrogen
cyanide by the action of enzyme known as Hydroxynitrile lyase
b) Release of the mustard-smelling volatiles from
glucosinolates is catalyzed by a hydrolytic enzyme, called a thioglucosidase or
myrosinase
c) substerate for Glycosidase is Cyanogenic glycoside
and Thioglucosidase is Aglycone
d) Like cyanogenic glycosides, glucosinolates are
stored in the intact plant separately from the enzymes that hydrolyze them, and
they are brought into contact with these enzymes only when the plant is crushed
Which of the following combinations of above statement is true?
#Question id: 10808
#Unit 6. System Physiology – Plant
Many plants also contain unusual amino acids, called nonprotein amino acids, these Nonprotein amino acids are often very similar to common protein amino acids. Canavanine, for example, is a close analog of_____A______, and azetidine-2-carboxylic acid has a structure very much like that of_____B________.
#Question id: 10809
#Unit 6. System Physiology – Plant
Sieve element sap is rich in sugars and other organic molecules, These molecules represent an energy investment for the plant. How their loss be prevented when sieve elements are damaged?
#Question id: 10810
#Unit 6. System Physiology – Plant
A mechanism for preventing sap loss entails closing sieve plate pores with callose, which is