List of top Biology Questions

Protein synthesis in an animal cell occurs :
Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?
The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is:
Which of the following pairs is correctly matched?
Carbohydrates most abundant biomolecules on earth, are produced by :
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:
Telomerase is an enzyme which is a:
E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because :
For retting of jute the fermenting microbe used is
Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness.
AIDS is caused by HIV that principally infects:
G-6-P dehydrogenase deficiency is associated with haemolysis of
The most biodiversity rich zone in India
Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?
A micro-organism, when viewed under a compound microscope with an objective lens of 40 X and an eye piece of 10 X magnification measured 4000 � in length. The same microorganism when observed under a dissection microscope with a lens of 10 X magnification, would measure........
A nucleosome is a portion of the chromonema containing_______
How many times a red blood corpuscle will have to pass through the heart in its journey from hepatic artery to the aorta ?
Osmoregulation in Paramecium is a function of
Which one of the following is not a characteristic feature of bryophytes ?
Which one of the following types of silk is being produced extensively in South India?
The macronutrient which is an essential component of all organic compounds, yet not obtained by plants from soil is
The following diagram indicates the reflex arc. Identify the parts labelled as A,B,C,D,E,F and G. Choose the correct option
How many human teeth appear twice during the life span of an individual ?
If a germ cell in a female gonad and a germ cell in a male gonad begin undergoing meiosis simultaneously, what will be the ratio of ova and sperms produced ?
An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the :