1. What is the function of DNA helicase?
A. Proof readingB. Unwinding DNA double helixC. DNA replicationD. Removing primer from chain
2. Which enzyme is not used to prepare insulin in genetic engineering?
A. DNA LigaseB. LipaseC. Reverse transcriptaseD. Restriction endonuclease
3. I hope to meet you ____ in January.
A. sometimesB. sometimeC. some timeD. some times
4. Two parallel slits are 4 mm apart. It is illuminated by a monochromatic light of wavelength 5600 Å. What will be the width of the fringe in mm on a screen located at a distance of 2.0 m?
A. 0.14B. 1.9 × 10−4C. 0.38D. 3.8 × 10−9 Δx = λD 2a = 5600×10−10×2 2×4×10−3 = 1400 × 10−7 = 0.14 × 10−3 = 0.14 mm
5. 2tan sin−1 coscot−1x =?
A. xB. 2xC. √1 − x2D. √ 1+x 1−x
6. Quantosome is found in-
A. chloroplastB. ribozomeC. endoplasmic reticulumD. mitochondria