List of top Biology Questions asked in AIIMS

Wine and beer are produced directly by fermentation whereas brandy and whisky require both fermentation and distillation. This is because
Which of the following are a group of micronutrients for plants?
Which is the longest phase of the cell cycle?
Which antibiotic has bactericidal effect?
Vernalisation is subjected to plants growing in
The $C_{4}$ plants differ from $C_{3}$ plants with reference to the
Refer the given figure of digestive system of earthworm and identify the part labelled X.
Match column I with column II and select the correct option from the given codes.
How are transformants selected from nontransformants?
'Cladode' is a characteristic morphological feature of
Removel of keystone species cause serious disruption in the functioning of the community. Keystone species are low in abundance (or biomass) than the dominant species.
Atretic follicles are found in the
The thallus of Riccia is internally differentiated into an upper photosynthetic region and lower storage region. The lower storage region is formed from parenchymatous cells.
Pulmonary circulation consists of flow of deoxygenated blood from right ventricle to the lungs and flow of oxygenated blood from lungs to the left atrium. Systemic circulation consists of flow of oxygenated blood from the left ventricle to all parts of the body and deoxygenated blood from different parts to right atrium.
Placenta in addition to connection with mother and foetus to ductless gland. It releases human gonadotropins.
One codon may code for more than one amino acid. A codon is degenerate and ambiguous.
Interspecific competition is the only potent force in organic evolution. Unexceptionally two closely related species competing for the same resources cannot co-exist indefinitely.
In a pivot joint, rounded or pointed bone fits into a shallow depression in another bone. Pivot joints are present between the metacarpals and phalanges of the fingers.
Human heart is myogenic. The contraction is initiated by a specialized patch of modified heart muscles without requiring stimulation from nerve cells.
Which of the following is a 'cyanophage'?
The brain disease caused due to accumulation of amyloid $\beta$ -peptide is
A drug addict showed symptoms such as increased appetite, chest pain, redness eyes, increased urination. He was possibily taking
Aerobic respiration produces more usable chemical energy than fermentation, because fermentation involves
Hypothetical plant hormones are
Which one of the following correctly describes the location of some body parts in the earthworm (Pheretima) ?