List of top Biology Questions

The smallest unit of classification is:
The secretory immunoglobulin present in the colostrum of mother is
Potato is included in solanaceae family because
Lamarck published his views on concepts of evolution in 1809 in his book:
To yield milk, cow is given
Presence of vestigial organs is in favour of which of the following theories?
Which of the following is the largest and edible bud?
Which of the following prevents the photo-oxidation and destruction of pigments ?
The genetic material of bacteria is present as:
The food in onion is stored in the form of:
Preparation of sperm before penetration of ovum is
How much amount of oxygen is present in one gram of haemoglobin?
Genes present on Y-chromosome are called
Biosphere is consist of:
Plasmids are single-stranded extra-chromosomal DNA. Plasmids are possessed by eukaryotic cells.
In the descending limb of loops of Henle, the urine is hypertonic, while in ascending limb of loops of Henle, the urine is hypotonic. Descending limb is impermeable to Na , while ascending limb is impermeable to HO.
Chloragogen cells of earthworm are similar to the vertebrate organ
Ora serrata is
There is an irregular mating population. If the frequency of an autosomal recessive lethal gene is 0.4, then the frequency of the carriers in a population of 200 individuals is
The disorders such as alkaptonuria and phenylketonuria are refered to as
The branch of biology dealing with the process of improvement of human race by selective breeding is called
The lining of bone marrow cavity is called
Which proteolytic enzyme induces lysis of fibrin during fibrinolysis?
In morula stage, the cells divide without any increase in size. Zona pellucida remains undivided till cleavage is complete.
Which of the following is an example of sex-linked inheritance?