List of top Biology Questions

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
The water potential of pure water is
Which of the following in sewage treatment removes suspended solids?
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Select the correct route for the passage of sperms in male frogs :
DNA replication in bacteria occurs
Artificial selection to obtain cows yielding higher milk output represents
Receptor sites for neurotransmitters are present on
Which of the following components provides sticky character to the bacterial cell?
Which of the following options best represents the enzyme composition of pancreatic juice?
Which of the following statements is correct?
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
The function of copper ions in copper releasing IUD's is :
The association of histone H1 with a nucleosome indicates:
The DNA double helix is exposed
The DNA fragments separated on an agarose gel can be visualised after staining with
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
A gene whose expression helps to identify transformed cell is known as
Spliceosomes are not found in cells of
The pivot joint between atlas and axis is a type of
An example of colonial alga is
Zygotic meiosis is characteristic of
Select the mismatch :
Frog's heart when taken out of the body continues to beat for some time.
Select the best option from the following statements:
  1. Frog is a poikilotherm
  2. Frog does not have any coronary circulation
  3. Heart is "myogenic" in nature 
  4. Heart is autoexcitable