#Question id: 362
#SCPH01 Biochemistry
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?
#Question id: 2097
#SCPH01 Biochemistry
Free and unesterified fatty acids bind to one of a number of chaperone proteins in order to be transported in the aqueous environment of the cytosol. Which of the following facilitates this intracellular transport?
#Question id: 4187
#SCPH28 | Zoology
Prokaryotic mRNA molecules that contain several coding regions that encode several polypeptides are __.
#Question id: 11914
#SCPH06 I Botany
Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,
#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.