#Question id: 5699
#SCPH06 I Botany
A chromosome aberration leads to no change in amount of gene in a genetic map however, appearance of loop in heterozygous condition. This is due to
#Question id: 10763
#SCPH05 I Biotechnology
In mevalonic acid pathway, three molecules of acetyl-CoA are joined together stepwise to form mevalonic acid, which intermediate steps it will perform to yield isopentenyl diphosphate (IPP2)?
#Question id: 1584
#SCPH28 | Zoology
Which cell type interacts with both the humoral and cell-mediated immune pathways?
#Question id: 11541
#I Life Science/ Life Sciences Group – I-V
The steroid hormone aldosterone affects only a small number of cells in the body because ________.
#Question id: 10906
#SCPH06 I Botany
The pressure-flow model explains phloem translocation as a flow of solution (bulk flow) driven by an osmotically generated pressure gradient between source and sink.
a) Phloem translocation, both active and passive mechanisms were considered. All theories, both active and passive, assume an energy requirement in both sources and sinks.
b) In sources, energy is necessary to move photosynthate from producing cells into the sieve elements. This movement of photosynthate is called phloem loading.
c) In sinks, energy is essential for some aspects of movement from sieve elements to sink cells, which store or metabolize the sugar. This movement of photosynthate from sieve elements to sink cells is called phloem unloading.
d) The Active mechanisms of phloem transport further assume that energy is required in the sieve elements of the path between sources and sinks simply to maintain structures.
From the given statements find out the correct for pressure-flow model.