Following are certain statements are related to the effect of red and far-red light;

a) under a dense canopy much of the red light is absorbed by plant pigments, resulting in transmittance of mostly far-red light

b) Pr (red) has highest photon flux at 680 nm while Pfr (far-red) has highest photon flux at 730nm

c) Pfr far-red light–absorbing form, which is considered to be the physiologically active form of phytochrome

d) R:FR ratio is strongly affected by the presence of a canopy because chlorophyll absorbs far-red but not red light

Which one of the combinations of above statements is incorrect?

TLS Online TPP Program

#Question id: 18678

#Unit 13. Methods in Biology

which of the following technique can be analysed of PCR products from HIV-I allowed the identification of between 200 000 and 500 000 viral particles per cubic centimetre of serum.

TLS Online TPP Program

#Question id: 18679

#Unit 13. Methods in Biology

Chiral compounds can be resolved using

TLS Online TPP Program

#Question id: 18680

#Unit 13. Methods in Biology

DNA from Salmonella species, when digested with the restriction enzyme Xba I, gives around 15 fragments ranging from 25 kb to 680 kb This pattern of fragments, or ‘fingerprint’, is unique to that strain. If the same fingerprint is found from bacteria from other infected people, then it can be assumed that they were all infected from a common source. Thus, by comparing their eating habits, food sources, etc. the source of the infection can be traced to a restaurant, food item. The fingerprints are created and analysed by

TLS Online TPP Program

#Question id: 18681

#Unit 13. Methods in Biology

Highly heterogeneous mixtures of proteins such as cell lysates or tissue extracts should be completely fractionated into individual proteins so as to obtain an overall picture of the protein composition and to enable location of individual proteins. The highest resolution is obtained 

TLS Online TPP Program

#Question id: 18682

#Unit 13. Methods in Biology

Which technique is shown in given representation

TLS Online TPP Program

#Question id: 18683

#Unit 13. Methods in Biology

Eukaryotic mRNA can be separated by using