Q. Which statement is incorrect for ion-channels? (a) They are proteins (b) All ions pass through same channel (c) Movement through them is diffusion (d) Movement through them is from…
Q. Which one of the following is not a micro-element for plants : (a) Cu (b) Zn (c) Cr (d) B Solution : Correct option : C Plants require many…
Q. Nitrite is changed to nitrate by : (a) Nitrobacter (b) Nitrosomonas (c) Pseudomonas (d) Clostridium Solution : Correct option : A There are two steps in nitrification process by…
Q. Enzyme nitrogenase is required for : Nitrification Nitrite reduction Nitrate reduction Nitrogen fixation Solution : Correct option : D Nitrogenase is an enzyme present in legume root roots. It…