List of top Biology Questions

During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded ?
During translation initiation in prokaryotes, a GTP molecule is needed in
Degeneration of a genetic code is attributed to the
Bartholin's are situated
Carcinoma refers to
Convergent evolution is illustrated by
Christmas disease is another name for
Cellular totipotency is demonstrated by
During transcription, the DNA site at which RNA polymerase binds is called:
What does lac refer to in what we call the lac operon:
Which one of the following contains the largest quantity of extracellular material:
What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA:
Which one of the following bacteria has found extensive use in genetic engineering work in plants:
Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorised as:
Which one of the following describes correctly the homologous structures:
Pattern baldness, moustaches and beard in human males are examples of
Bundle of His is a network of
Genetic map is one that
In Drosophila, the sex is determined by
Darwin in his Natural Selection Theory did not believe in any role of which one of the following in organic evolution:
The first case of IVF-ET technique success, was reported by :
What used to be described as Nissel granules in a nerve cell are now identified as
Which one of the following pairs is not correctly matched:
The major role of minor elements inside living organisms is to act as:

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder: