List of top Biology Questions

The function of nitrogen fixation in Anabaena (cyanobacterium) is performed by

Centre of DNA Fingerprinting and Diagnostics $(CDFD)$ is located at

$pBR _{322}$, which is frequently used as a vector for cloning gene in $E$. coli is a/an

In a bacterium, the amount of adenine was found to be $18$ percent. Suggest the cytosine base composition from the following

In the blood of an adult man the total content of haemoglobin is roughly

Which one of the following is the best stage to observe the shape, size and number of chromosomes in a cell?

The main function of the white blood cell in the human intestine system is to

Sinking of zooplankton during the day and rising to the surface at night is an example of

Animals take phosphorus from

Okazaki is known for his contribution to the understanding of

Which one of the following is not a lateral meristem?

Which of the following are used in gene cloning ?

Vegetative propagation in Pistia occurs by

Heartwood differs from sapwood in

Given below is the diagram of a stomatal apparatus. In which of the following all the four parts labelled as A, B, C and D are correctly identified?

Genetic engineering has been successfully used for producing

dB is a standard abbreviation used for the quantitative expression of

A renewable exhaustible natural resource is

Which one of the following ecosystem types has the highest annual net primary productivity ?

Spirulina belongs to kingdom

Which factor controls the population density ?

Genetically engineered bacteria are being employed for production of

Rhizophora is a characteristic component of

The term biosystematics was coined by

The fungus commonly known as bread mould is