Which of the following is correct

A. A set of homologous genes should share common features that preceded their evolutionary separation.

B. All globin genes have a common form of organization with four exons and one introns.

C. A gene family is defined as a group of genes that encode related or identical products as a result of gene-duplication events.

#Question id: 11716

#Unit 10. Ecological Principles

Macroecology addresses patterns of range size and population density. Which of the following statements is true?

#Question id: 11717

#Unit 6. System Physiology – Plant

Inhibitors of the third stage of the gibberellin biosynthetic pathway is___

#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?