List of top Biology Questions

During the purification process for recombinant DNA technology, the addition of chilled ethanol precipitates out :

Match Column - I with Column - II.
 Column - I Column - II
(a) Nitrococcus(i)Denitrification
(b)Rhizobium(ii)Conversion of ammonia to nitrite
(c)Thiobacillus(iii)Conversion of nitrite to nitrate
(d)Nitrobacter(iv)Conversion of atmospheric nitrogen to ammonia
Choose the correct answer from options given below.
Match Column - I with Column - II.
 List - I List - II
(a)Physalia(i)Pearl oyster
(b)Limulus(ii)Portuguese Man of War
(c)Ancylostoma(iii)Living fossil
(d)Pinctada(iv)Hookworm
Choose the correct answer from the options given below.

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as

Which of the following statements wrongly represents the nature of smooth muscle?

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is

Match Column - I with Column - II.

 List - I List - II
(a)Metamerism(I)Coelenterata
(b)Canal system(II)Ctenophora
(c)Comb plates(III)Annelida
(d)Cnidoblasts(IV)Porifera

Choose the correct answer from the options given below.

In the equation $GPP - R = NPP\,\,\, R$ represents :
Xerophthalmia disease is caused by which deficiency of vitamin?
Through which of the following is water transported in a plant ?
In humans, the total amount of urine excreted per day is about
The position of the right kidney is lower than the left kidney due to the presence of this organ above it
Palaeontologists deal with____
Fern leaf which produces spores is called
In F2 generation, the phenotype ratio of dihybrid cross_____
Number of pairs of contrasting characters in pea plants selection by Mendel
The wings of a bat and wings of bird are an example of
Which of the following is the largest artery ?
What are the positions of auricles and ventricles in the heart ?
Which of the following pairs is matched correctly ?
Which cell organelle in a plant cell participates in photosynthesis
A person has loss of control on emotions. Which part of brain must have stopped functioning ?
The hormone responsible for phototropism in plants is
In plants, the fusion of male gamete with secondary nucleus results in
In majority of flowering plants, how many cells are present in an embryo sac ?