List of top Biology Questions asked in AIIMS

Which one of the following shows heterothallism?
ABA is involved in
A person sitting at rest experiences a temporary cessation of breathing after forced deep breathing for a few minutes. This is due to
There is increase in blood urea when there is insufficient filtration in
Which of the following is not a character of cancerous tissues in our body ?
Which one of the following useful organisms is not a part in production of curd/yoghurt?
The pollen grains of rice and wheat lose their viability in ___ minutes of their release.
The plants which can withstand with narrow and broad range of temperature tolerance respectively are
Sexual stage (gametocytes) of Plasmodium occurs in
Organogenesis or morphogenesis in tissue culture is controlled/regulated by phytohormones the credit of this important discovery goes to
Which one as used/regarded as biofertiliser?
Which of the following is not an invasive species?
Which of the following is true for excretion in humans?
Which of the following organelles contain DNA? (i) Mitochondria (ii) Chloroplasts (iii) Golgi bodies (iv) Ribosomes
Stinging capsules (nematocysts) are found in
Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into urethra. (i) $\quad$Prostrate gland (ii) $\quad$Seminal vesicle (iii)$\quad$ Bulbourethral gland
$SER$ and $RER$ can be distinguished with its presence in
Oxidation state of iron in haemoglobin is
Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of
India is one of the twelve megadiversity countries with ____ of genetic resources of the world.
Genetically modified (GM) crops can be produced by
Small intestine is the principal organ for absorption of nutrients. Absorption of water, simple sugars and alcohol etc. takes place in small intestine.
Protostele is the simplest stele. Protostele is the most advanced type of stele.
Periodic abstinence is a natural method where couples abstain from coitus Coitus from day 5-10 should be avoided because this is the time of ovulation.
Meiosis II is similar to mitosis. Meiosis I cannot occur in haploid cells.