Early-acting stress sensors provide the initial signal for the stress response,  several possible examples of stress-sensing mechanisms that act early in the pathway have been identified. They include:

A) calcium channel (cyclic nucleotide-gated calcium channel) that senses changes in temperature

B) A kinase (SnRK1, a SNF1-related kinase 1) that senses energy depletion during stress

C) A plasma membrane histidine kinase (ATHK1) that senses osmotic stress

D) A leucine rich repeat receptor kinase (LRRK) protein (Srlk)

E) An endoplasmic reticulum transmembrane sensor inositol-requiring enzyme 1 (IRE1)

And activating several response after sensing these mechanisms;

i) activates hundreds of stress-response transcripts

ii) that functions as an upstream regulator of salinity responses in Arabidopsis

iii) that is required for acclimation to heat stress

iv) that is required for heat tolerance in plants

v) activates ABA-dependent and ABA-independent responses

Which of the following is the correct match the activating response with its sense mechanism;

#Question id: 5751

#Unit 8. Inheritance Biology

A biochemical mutant that must be supplied with a particular nutrient for growth would be described as a(n)

#Question id: 5752

#Unit 8. Inheritance Biology

#Question id: 5753

#Unit 8. Inheritance Biology

A bacterial histidine mutant was plated on minimal medium and a single colony grew. You decide to sequence the histidine biosynthetic gene of the revertant and discover that the original mutation is still present.  This colony must have been able grow due to a

#Question id: 5754

#Unit 8. Inheritance Biology

A cell is exposed to EMS (a mutagen that causes guanine to mispair with thymine) and allowed to undergo a few rounds of DNA replication.  The mutational event caused by this mutagen will be

#Question id: 5755

#Unit 8. Inheritance Biology

A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell.  She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU).  However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably

#Question id: 5756

#Unit 8. Inheritance Biology

Type of mutation caused by an addition or deletion of a base in a polypeptide-encoding part of a gene