The yeast Saccharomyces cerevisiae divides by budding: instead of dividing to produce two identical daughter cells, the so-called mother cell buds to produce a daughter cell, The HO gene is expressed only in mother cells and only at a certain point in the cell cycle,

1. SBF	I- Which is active only during the G1-S transition of the cell cycle.
2. SWI5	II-Which acts only in the mother cell.
	III- Recruit nucleosome modifiers

#Question id: 28520

#Unit 5. Developmental Biology

#Question id: 28947

#Unit 7. System Physiology – Animal

#Question id: 11815

#Unit 6. System Physiology – Plant

Some given statements about  the cytokinin signalling pathway;

a)  Cytokinin receptor CRE1 probably functions as a monomer

b) Two other hybrid sensor kinases (AHK2 and AHK3) may also act as cytokinin receptors in Arabidopsis

c) Activated receptor activates their histidine kinase activity, The phosphate is transferred to an aspartate residue (D) on the fused receiver domains

d) The phosphate is then transferred to a conserved histidine present in an AHP protein that transfer the phosphate to an aspartate residue  located within the receiver domain of type-B ARRs only

e) The phosphorylation of the type-B ARR activates the output domain to induce transcription of genes encoding type-A ARRs.

f) The phosphorylated type-A ARRs feed back to negatively regulate cytokinin signaling, thus dampening cytokinin responses

Which of the following are the correct prediction about cytokinin signalling?

#Question id: 7010

#Unit 5. Developmental Biology

After anchor cell formation, When LIN-12 is used again during vulva formation, it is activated by the primary vulval lineage to

#Question id: 3725

#Unit 3. Fundamental Processes

What is the function of the primosome?