List of top Biology Questions

Which part of root absorb mineral?

Which one of the following guides the entry of the pollen tube into the embryo sac?
Which of the following is not a function of sperm?
The active constituent in Ocimum sanctum largely responsible for the therapeutic potential is
Basic numerical characteristics of sexual parts were given emphasis in the classification system proposed by
Secretory structures present in the pith and cortex of Cycas stem are
From the anatomical point of view meristeles in a dictyostele are
The shortest stage of mitosis often lasting only a few minutes is
Match List-I with List-II \[ \begin{array}{|l|l|} \hline \textbf{Product} & \textbf{Producer} \\ \hline (A) \; \text{Citric Acid} & (I) \; \text{Trichoderma polysporum} \\ \hline (B) \; \text{Ethanol} & (II) \; \text{Monascus purpureus} \\ \hline (C) \; \text{Statins} & (III) \; \text{Saccharomyces cerevisiae} \\ \hline (D) \; \text{Cyclosporin A} & (IV) \; \text{Aspergillus niger} \\ \hline \end{array} \]

The following question is based on pollination. Study the figures carefully and answer the questions that follow.

  • Give the scientific terms for the processes taking place in Figures A and B respectively.
  • Mention two conditions necessary for the process occurring in Figure B.
  •  
    • [(i)] State one advantage and one disadvantage of the process occurring in Figure B. 
      OR
    • [(ii)] Name one plant where, in some flowers only, the process in Figure B takes place and give the reason responsible for it.
Antibody molecule has:
The process of copying genetic information from one strand of DNA into RNA is termed as -

What is Microalbuminuria ?

Which one of the following is not associated with the process of transcription in bacteria?
The first isolated restriction endonuclease was:
If Meselson and Stahl's experiment is continued for 80 minutes (till III generation), what would be the ratio of DNA containing N$^{15}$/N$^{15}$ : N$^{15}$/N$^{14}$ : N$^{14}$/N$^{14}$ in the medium?
Which of the following substances obtained from marine organisms is used for the treatment of heart vessel blockages?
B - Some proteins are found in the blood and can also interact with different enzymes. What are these proteins called?
Which chemical is responsible for causing allergies?
Which of the following statements is true regarding a specific type of cell structure?
In the context of the central nervous system, which of the following is incorrect?
In the diagram, identify the structure marked as "%" and select the correct option.
Which of the following pairs of organs is correctly matched?
(i) Brain and Spinal Cord
(ii) Gut and Stomach
(iii) Eyes and Ears
(iv) Kidneys and Lungs
Scientists have estimated that the total number of DNA bases in humans is approximately:
Out of the following five organisms, how many show bisexual reproduction as well as internal fertilization?
Earthworm, Frog, Cockroach, Human, Sparrow