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                        ...

Q. Which one of the following techniques is used to monitor RNA transcripts, both temporally and spatially? (A) Northern blotting (B) In situ hybridization (C) Southern blotting  (D) Western blotting Ans: In situ hybridization

Q. Standard error is (A) the probability of a type I error in a statistical test (B) the error in estimating a sample standard deviation (C) the standard deviation of a variable that follows standard normal distribution (D) the standard deviation of distribution of sample means Ans: ...

Q. Which one of the following statements is true for actin? (A) Actin filament is structurally polarized and the two ends are not identical (B) De novo actin polymerization is a single-step process (C) The pointed end of the actin filaments is the fast growing end (D) Actin forms ...

Q. Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the molecule X by expressing protein Y. Which one of the following modes of signaling represents the interaction between A and B? (A) Autocrine                          (B) Juxtacrine ...