#Question id: 3656
#SCPH01 Biochemistry
In nucleotide excision repair, an endonuclease makes nicks on either side of the lesion.
#Question id: 10906
#I Life Science/ Life Sciences Group – I-V
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.
#Question id: 3644
#SCPH05 I Biotechnology
In replication: soon after synthesis, the DNA fragments are joined to make one continuous piece of DNA by the enzyme:
#Question id: 9236
#SCPH06 I Botany
Which of the following outcomes is caused by excessive nutrient runoff into aquatic ecosystems?
#Question id: 1604
#SCPH01 Biochemistry
Many viruses produce a protein immunoevasin that interferes with antigen presentation by MHC class I molecules. The immunoevasin interfere MHC presentation by