1. Reverse transcriptase enzyme become effective in which case?
A. tobacco mosaic virusB. –bacteriophage T2C. HIVD. influenza virus
2. The train _____ arrive at 11:30 but it was an hour late.
A. supposed toB. is supposed toC. was supposed toD. has supposed to
3. In the figure, what does the slope of the graph OA between stress and strain indicate?
A. Yield pointB. Young's modulusC. Mass pointD. Permanent strain
4. Which of the following is a redox reaction?
A. HF + KOH → KF + H2OB. NaCl + AgNO3 → NaNO3 + AgClC. CaCO3 → CaO + CO2D. 2H2S + SO2 → 2H2O + 3S −2 2H2S + +4 SO 2 → 2H2O + 3S 0
5. Condition for a car to turn safely–
A. v ≤ (rgtan θ) 1 2B. v ≤ (rgtan θ)C. v > rgtan θD. v > (rgtan θ) 1 2
6. Which of the following electromagnetic wave has the highest frequency?
A. X-rayB. UV-rayC. IRD. Radio waves