The statement that correctly describes the characteristic(s) of a gene is :

1. In individuals of a given species, a specific gene is located on a particular chromosome.
2. A gene is not the information source for making proteins in the cell.
3. Each chromosome has only one gene located all along its length.
4. All the inherited traits in human beings are not controlled by genes.

Consider the structures of the three cyclic carbon compounds A, B and C given below and select the correct option from the following:

1. A and C are isomers of hexane and B is benzene.
2. A is an isomer of hexane, B is benzene and C is an isomer of hexene.
3. A is a saturated cyclic hydrocarbon and B and C are unsaturated cyclic hydrocarbons.
4. A is cyclohexane and B and C are the isomers of benzene.

An organism which breaks down the food material outside the body and then absorbs it is

1. a plant parasite, Cascuta
2. an animal parasite, Tapeworm
3. a bacteria, Rhizobium
4. a fungi, Rhizopus

Select from the following the correct statement about tropic movement in plants:

1. It is due to stimulus of touch and temperature.
2. It does not depend upon the direction of stimulus received.
3. It is observed only in roots and not in stems.
4. It is a growth related movement.