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Q.41 A wooden plant accumulates 10 𝑚𝑔 𝑘𝑔−1 of 14C during its life span. A fossil ofthis plant was discovered and contains 2.5 𝑚𝑔 𝑘𝑔−1 of 14C. The age of […]

Q.40 Which of the following is/are true about Retrovirus?(A) It contains double–stranded RNA genome(B) It can cause cancer(C) It contains reverse transcriptase(D) It contains double–stranded DNA genome Retroviruses are RNA […]

Q.39 Which of the following is/are trace element(s)?(A) Mn(B) P(C) S(D) Zn Mn and Zn are trace elements (micronutrients) required by plants in very small amounts, while P and S […]

Q.38 Which of the following entity(ies) is/are found inside the intact nucleus ofeukaryotic cells?(A) Centrosome(B) Lysosome(C) Nucleolus(D) Nucleosome Correct Answer: (C) and (D) The intact nucleus of eukaryotic cells contains […]

Q.37 Which of the following technique(s) can be used to determine the three–dimensional structure of an organic compound?(A) Mass spectrometry(B) NMR spectroscopy(C) UV–visible spectroscopy(D) X–ray crystallography Correct Answer: (B) NMR […]

Q.36 Which of the following statement(s) about the effect of genetic drift is/arecorrect?(A) It can cause changes in the frequency of alleles at random(B) It is a mechanism of evolution(C) […]

Q.35 Which of the following is/are example(s) of a lotic ecosystem?(A) Lake(B) Pond(C) River(D) Stream CORRECT ANSWER: (C) River and (D) Stream Quick Answer Explanation: Lotic Ecosystem = Flowing water ecosystems […]

Q.34 Which of the following method(s) is/are used to estimate protein concentration?(A) Anthrone(B) Biuret(C) Bradford(D) Lowry Answer: (B), (C), and (D) Biuret, Bradford, and Lowry methods measure protein concentration through […]

Q.33 Which of the following statement(s) about eukaryotic DNA topoisomeraseis/are correct?(A) Topoisomerase I creates transient single–strand breaks(B) Topoisomerase I creates transient double–strand breaks(C) Topoisomerase II creates transient single–strand breaks(D) Topoisomerase […]

Q.32 Which of the following statement(s) about Golden Rice is/are correct?(A) Consumption of it increases vitamin A levels(B) Consumption of it increases vitamin D levels(C) Consumption of it increases vitamin […]