List of top Biology Questions

The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because :

The genotype of a plant showing the dominant phenotype can be determined by

Vasa eflferentia are the ductules leading from

Bovine spongiform encephalopathy is a disease caused by prions in a.....

According to Darwin, evolution is_______

Sporopollenin, a chemical substance is found in________

The following diagrams A, B, C, D and E show the different types of arrangement of stamens based on the cohesion of their parts in different plants. Assign the stamens to their respective plants. Choose the correct answer.

The presence of corollary corona, sagittate anthers and dumb-bell shaped stigma are the characteristic features of_____________

In which of the following situations, is there a risk factor for children of incurring Erythroblastosis foetalis?

Some of the steps involved in the production of Humulin are given below. Choose the correct sequence. i) Synthesis of gene (DNA) for human insulin artificially. ii) Culturing recombinant E.coli in bioreactors. iii) Purification of humulin. iv) Insertion of human insulin gene into plasmid. v) Introduction of recombinant plasmid into E.coli. vi) Extraction of recombinant gene product from E.coli.

In C4 pathway, the CO2 fixation in mesophyll cells is carried out by the enzyme .........

Match the animals listed in Column I with their of nature of blood listed in Column II. Choose the answer which gives the correct combination of alphabets of the two columns

Infectious proteins are present in

In human female the blastocyst

The terminal velocity of a rain drop of radius $r$ is $ 2\,cm\,s^{-1}$ . If eight such identical drops combine to form a single large drop, the terminal velocity would be

Chordae tendineae are found in

One molecule of $NADH_2$ is equivalent to how many $ATP$ molecules?

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with Components: (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Cell vacuole (viii) Nucleus The correct components are:

	A	B	C	D
(1)	(v)	(iv)	(viii)	(iii)
(2)	(i)	(iv)	(viii)	(vi)
(3)	(vi)	(v)	(iv)	(vii)
(4)	(v)	(i)	(iii)	(ii)

Select the correct statement from the following

A bilaterally symmetrical deuterostorne is classified in the phylum

Deposition of cholesterol in walls of arteries is

Which one of following is used as vector for cloning genes into higher organisms ?

Which one of the following pairs is an example for lateral meristem?

The diagram of Labeo rohita is given below. Identify the parts labelled A, B, C, D, E, F, G.