List of top Biology Questions

One of the breeding techniques useful to eliminate harmful recessive genes by selection is

Herbicide that blocks electron transport from PS-II to PS-I by inhibiting electron flow between plastoquinone \(\rightarrow\)cytochrome is

Some functions of nutrient element are given below
(I) Important constituent of proteins involved in ETS. 
(II) Activator of catalase. 
(III) Important constituent of cytochrome.
(IV) Essential for chlorophyll synthesis.
The concerned nutrient is

Double fertilization is exhibited by :

Which one of the following is related to Ex-situ conservation of threatened animals and plants ?

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?

An example of colonial alga is :

Which ecosystem has the maximum biomass ?

Identify the wrong statement in context of heartwood:

Life cycle of Ectocarpus and Fucus respectively are:

Zygotic meiosis is characteristic of ;

Select the correct route for the passage of sperms in male frogs :

Which of the following is made up of dead cells?

The number of roots of equation $\cos \, x + \cos \, 2x + \cos \, 3x = 0$ is $(0 \le x \le 2 \pi )$.

A disease caused by an autosomal primary non- disjunction is:

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

Climax community is a state of:

Plants which produce characteristic pneumatophores and show vivipary belong to :

The decomposers in an ecosystem are ______

The pH of nutrient medium in plant tissue culture is adjusted between _____

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

The final proof for DNA as the genetic material came from the experiments of

Attractants and rewards are required for

Select the mismatch :