List of top Science Questions asked in UP Board

Draw a labelled diagram of longitudinal section (L.S.) of gynoecium to show the fertilization in flowers and describe it.
What are Mendel's laws? Explain them with suitable diagrams.
What is Ohm's law? Explain by drawing the associated circuit diagram. Also discuss the terms on which the resistance of an electrical conductor depends.
The autotrophic mode of nutrition requires:
Which is not a part of the female genital system in humans from the following?
The examples of homologous organs are:
Who proposed the Natural Selection Theory?
A convex mirror of radius of curvature 2 metres is attached to a motor bike to watch any other vehicle coming from behind. Calculate the location and position of a vehicle which is at 4 metres behind the bike as seen in the mirror. Also explain by the ray diagram.
Asexual reproduction takes place through budding in:
A person suffering from short-sightedness can see up to 100 meters. Calculate the nature and the focal length of the lens in order to correct this defect so that he can see objects at infinity hence correct vision. Also, draw the ray diagram.
The reactions in which new compounds are formed by exchange of ions, are called:
Useful substance in making water bacteria free is:
The function of xylem in plants is:
The alkene in the following is:
In which of the following plants did Mendel perform his experiments on inheritance?
The bond present in chlorine molecules is:
A solution turns red litmus into blue. The possible pH value of this solution is:
On which of the following does the resistance of an electrical conductor not depend?
In which combination the four resistors be connected to have minimum resultant resistance?
The alkene in the following is:
One needs the help of which of the following rules to know the direction of the magnetic field produced due to a current carrying conductor?
The sun appears whitish:
Which of the following metals produces hydrogen gas with cold water?
Which of the following metals produces hydrogen gas with cold water?
When a beam of white light falls on the surface of a triangular prism of glass, it splits, after emerging out from the prism, into various colours with different deviations. Which colour has maximum deviation?