Q. Determine the correctness or otherwise of the following Assertion and the Reason Assertion: The association constant in water for the G-C base pair is three times lower than that for the A-T base pair. Reason: There are three hydrogen bonds in the G-C base pair and two in the A-T base ...

Q. Which one of the following amino acids is catalyzed by activated macrophages to produce reactive nitrogen species?               (A) Arginine         (B) ...

Q. Determine the correctness or otherwise of the following Assertion and the Reason Assertion: Ab initio gene finding algorithms that predict protein coding genes in eukaryotic genomes are not completely accurate. Reason: Eukaryotic splice sites are difficult to predict. (A) Both and ...

Q. Which of the following cytokines are endogenous pyrogens? P. Tumor necrosis factor-a Q. Interleukin-1 R. Transforming growth factor-β S. Interleukin-10 (A) P and Q only (B) P and R only (C) R and S only (D) Q and S only Ans: P and Q only

Q. In leguminous plants, both the rhizobium genes and the plant genes influence nodulation and nitrogen fixation. Which one of the following functions is NOT encoded by the host plant genes? (A) Production of inducers that modify rhizobial cell wall (B) Production of flavonoid inducers ...

Q. Genomic DNA isolated from a bacterium was digested with a restriction enzyme that recognizes a 6-base pair (bp) sequence. Assuming random distribution of bases, the average length (in bp) of the fragments generated is           Ans: 4096 to 4096

Q. A single stem cell undergoes 10 asymmetric cell divisions. The number of stem cells at the end is    Ans: 1 to 1

Q. The absorbance of a solution of tryptophan measured at 280 nm in a cuvette of 2.0 cm path length is 0.56 at pH 7. The molar extinction coefficient (e) for tryptophan at 280 nm is 5600 M-1cm-1 at pH 7. The concentration of tryptophan (in µM) in the solution is ...

Q. The variable 𝑧 has a standard normal distribution. If 𝑃(0 ≤ 𝑧 ≤ 1) = 0.34, then 𝑃(𝑧2 > 1) is equal to (up to two decimal places)            Ans: 0.32 to 0.32

Q. Which one of the following plant secondary metabolites is a natural insecticide? (A) Digitoxin         (B) Pyrethrin              (C) Salicylic acid           (D) Avenacin A-1 Ans: Pyrethrin

Q. Which one of the following is the solution for 𝑐𝑜𝑠2𝑥 + 2𝑐𝑜𝑠𝑥 + 1 = 0, for values of 𝑥 in the range of 0° < 𝑥 < 360°?              (A) 45°              (B) 90°                        (C) 180°                      (D) 270° Ans: 180° 

Q. Identify the character based method(s) used for the construction of a phylogenetic tree. P. Maximum parsimony Q. Neighbor joining R. Maximum likelihood S. Bootstrapping (A) Q only                                 (B) P and R only (C) Q and S only                        ...