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Q.6 Vincristine and vinblastine, two commercially important secondary metabolites from Carrants roses, are examples of(A) alkaloids.(B) flavonoids.(C) terpenoids.(D) steroids Vincristine and vinblastine from Catharanthus roseus are vinca alkaloids, making option […]
![Q.5 Determine the correctness or otherwise of the following Ascention (a) and the Reason (r) regarding mammalian cells. Assertion (a): Cells use Ca2+, and not Na+, for cell-to-cell signalling Reason[r): In the cytosol, concentration of Na+ is lower than that of Ca2+ ? (A) Both (a) and (r) are true and (r) is the correct reason for [a]. (B) Both (a) and rare true but [c] is not the correct reason for (a). (C) Both (a) and care false (D) [a] is true but is false.](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_5-11.png)
Q.5 Determine the correctness or otherwise of the following Ascention (a) and theReason (r) regarding mammalian cells.Assertion (a): Cells use Ca2+, and not Na+, for cell–to–cell signallingReason[r): In the cytosol, […]
Q.4 Which class of antibody is first made bydeveloping B cells inside bone marrow?(A) IgG(B) IgE(C) IgA(D) IgM IgM is the first class of antibody produced by developing B cells […]
![Q.3 Which of the following statements are CORRECT? [P] Viruses can play a role in causing human Cancer [Q] A tumor suppressor gene can be turned off without any change in its DNA sequence [R] Alteration in miRNA expression levels contributes to the development of cancer (A) P and only (B) Q and only (C) P and only (D) P. and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_3-11.png)
Q.3 Which of the following statements are CORRECT?[P] Viruses can play a role in causing human Cancer[Q] A tumor suppressor gene can be turned off without any change in its […]
Q.2 Ras protein is a(A) trimeric GTPase involved in relaying signalfrom cell surface to nucleus.(B) monomeric GTPase involved in relayingsignal from cell surface to nucleus.(C) trimeric GTPase involved in regulation […]
Q.1 Protein P becomes functional upon phosphorylation of a serine residue. Replacing this serine with will result in a phosphomimic mutant of P.(A) alanine(B) aspartic acid(C) phenylalanine(D) lysine Aspartic acid […]
Q.10 The profit shares of two companies P and Q are shown in the figure. If the two companies have invested a fixed and equal amount every year, then the […]
![Q.9 For a matrix M = [mij]; i, j = 1,2,3,4, the diagonal elements are all zero and mij = -mji. The minimum number of elements required to fully specify the matrix is (A) 0 (B) 6 (C) 12 (D) 16](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_9.jpg)
Q.9 For a matrix M = [mij]; i, j = 1,2,3,4, the diagonal elements are all zero and mij = -mji. The minimum number of elements required to fully specify […]
Q.8 The distance between Delhi and Agra is 233 km. A car P started travelling from Delhi to Agra and another car started from Agra to Delhi along the same […]
Q.7 P. Q, R, S, T, U, V, and W are seated around a circular table. 1. Sis seated opposite to W. II. U is seated at the second place […]
