A single stem cell undergoes 10 asymmetric cell divisions. The number of stem cells at the
Q. A single stem cell undergoes 10 asymmetric cell divisions. The number of stem cells at the end is Ans: 1 to 1
GATE
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
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 Ans: 0.32 to
The variable 𝑧 has a standard normal distribution. If 𝑃(0 ≤ 𝑧 ≤ 1)= 0.34
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
The variable 𝑧 has a standard normal distribution. If 𝑃(0 ≤ 𝑧 ≤ 1)= 0.34 Read More »
Which one of the following plant secondary metabolites is a natural insecticide?
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
Which one of the following plant secondary metabolites is a natural insecticide? Read More »
Which one of the following is the solution for 𝑐𝑜𝑠2𝑥 + 2𝑐𝑜𝑠𝑥 + 1 = 0
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°
Which one of the following is the solution for 𝑐𝑜𝑠2𝑥 + 2𝑐𝑜𝑠𝑥 + 1 = 0 Read More »
Identify the character based method(s) used for the construction of a phylogenetic tree
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 (D) S only Ans: P and R only
Identify the character based method(s) used for the construction of a phylogenetic tree Read More »
Which one of the following techniques is used to monitor RNA transcripts, both temporally and spatially?
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
Standard error is
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: the standard deviation of distribution of sample means
Which one of the following statements is true for actin?
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 spindle fibers during mitosis Ans: Actin
Which one of the following statements is true for actin? Read More »
Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the
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 (C) Paracrine (D) Intracrine Ans: Paracrine