#Question id: 11718
#Unit 6. System Physiology – Plant
The enzymes and genes of the Gibberellin biosynthetic pathway have been characterized, Most notable from a regulatory standpoint are___A) biosynthetic enzymes and B) metabolic enzymes involved from which enzymes?
#Question id: 11719
#Unit 6. System Physiology – Plant
Gibberellin conjugates are particularly prevalent in some
seeds. The conjugating sugar is usually glucose, and it may be attached to the
gibberellin via,
a) a carboxyl group forming a gibberellin glycosyl ether
b) a hydroxyl group forming a gibberellin glycosyl ether
c) a carboxyl group forming a gibberellin glycoside
d) a hydroxyl group forming a gibberellin glycoside
which one of the following is the correct statements about conjugation?
#Question id: 11720
#Unit 6. System Physiology – Plant
The embryo, which will grow into the new seedling, has a specialized absorptive organ that is___
#Question id: 11721
#Unit 6. System Physiology – Plant
The induction of α-amylase synthesis in barley aleurone layers by gibberellin, given some statements about after the induction of GA into the aleurone layer, and allows some transcriptional gene function inside the nucleus such as;
a) GA-MYB is a negative regulator of α-amylase transcription
b) The sequence of the gibberellic acid response element
(GARE) in the α-amylase gene promoter is similar to the DNA sequence to
which MYB proteins bind.
c) Synthesis of GA-MYB mRNA begins to increase as early as 1
h after gibberellin treatment, preceding the increase in a-amylase mRNA by
several hours
d) A mutation in the GARE that prevents MYB binding also
prevents α-amylase expression.
e) GA-MYB can therefore be defined as a primary or early response
gene, while the α-amylase gene is a secondary or late response gene
f) The secretory pathway requires GA stimulation of the
calcium-calmodulin– independent pathway.
Which of the following statements is incorrect about this transcriptional gene?
#Question id: 11722
#Unit 6. System Physiology – Plant
The induction of GA-MYB and α-amylase mRNA by GA3, the
production of GA-MYB and α-amylase mRNA has shown in graph,
which of the following is the correct representation relation between these two
mRNA .
#Question id: 11723
#Unit 6. System Physiology – Plant
During the α-amylase secretion pathway, a mutation will be found in the sequence of gibberellic acid response element (GARE) the what will caused;