Red and far-red lights are perceived by plants through various photoreceptors including phytochromes. The red/far-red reversibility of seed germination was due to the-

a) photoreversibility of phytochrome

b) presence of red and far-red light at different fluence rate

c) Conversion of Pr to Pfr form through the effect of red light

d) equal proportion of red and far red light at same fluence rate

Which of the following combinations is correct?

TLS Online TPP Program

#Question id: 239

#Unit 1. Molecules and their Interaction Relevant to Biology

ATP is not a nucleoside because it ________.

TLS Online TPP Program

#Question id: 240

#Unit 1. Molecules and their Interaction Relevant to Biology

Purines and pyrimidines exist in two tautomeric forms (lactam and lactim); nucleosides exist in two conformations (syn and anti). The most common forms found in cells are

TLS Online TPP Program

#Question id: 241

#Unit 1. Molecules and their Interaction Relevant to Biology

In DNA, phosphodiester bonds form with hydroxyl groups of carbons number ________ and ________ of each deoxyribose sugar.

TLS Online TPP Program

#Question id: 242

#Unit 1. Molecules and their Interaction Relevant to Biology

Cells fed5-methyl uracil (radioactive in the methyl group) will form radioactive ________.

TLS Online TPP Program

#Question id: 243

#Unit 1. Molecules and their Interaction Relevant to Biology

Deoxythymidine is a ________ found mainly in DNA.

TLS Online TPP Program

#Question id: 244

#Unit 1. Molecules and their Interaction Relevant to Biology

The difference between dGMP and GMP is