AIIMS Zoology Questions

Which of the following is correct regarding respiration in adult frog?

The 'cells of Rouget' are

Choose the correct statement.

One of the world's most poisonous fish toxins is released by

Na⁺/K⁺ pump is associated with

The microscope usually used for seeing living cells or tissues is

Which of the following is correctly labelled?

Apiculture is associated with which of the following groups of plants?

During muscular contraction, which of the following events occur? (i) H⁻zone disappears (ii) A band widens (iii) I band reduces in width (iv) Width of A band is unaffected (v) M line and Z line come closer.

The release of chemical messenger from synaptic vesicles is under the influence of these ion(s).

Cattle ranches are known to cause acute greenhouse effect. This is due to

Catecholamine in a normal person induces

Select the option having all the correct matches. Structure Percentage Function

Oxygen binding to haemoglobin in blood is

The extinct human ancestor, who ate only fruits and hunted with stone weapons was

What is common between earthworm and Periplaneta?

RNA interference is essential for the

Select the option having all correctly matched pairs.

Ventricular diastole occurs due to a/an

Select the correct statement.

Pebrine in silkworms is caused by

Assertion : Myelin sheath insulates the nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated nerve fibres than in myelinated ones.

Assertion : Frog can change its colour, according to its surroundings. Reason : It is a way of mimicry to capture preys.

Assertion : Less iodine intake causes goitre. Reason : Less iodine in body decreases thyroxine secretion.

Assertion: In proximal convoluted tubule glomerular filtrate becomes hypertonic to blood plasma. Reason: HCO₃⁻ is absorbed only in the proximal convoluted tubule.

Assertion: Filarial worm is transmitted to humans by Culex mosquito. Reason: Culex prefers to breed in fresh water.

Assertion: AIDS is caused by the HIV, a retrovirus. Reason: Retroviruses have RNA genome.

Assertion: A male is found to be lacking facial hair and pubic hair. Reason: It is a case of hyposecretion of testosterone from Leydig's cells of testes.

Assertion: Emulsification is necessary for the digestion of fats. Reason: After fats are emulsified, the action of enzyme amylase gets significantly increased.

Assertion: In jaundice, the skin and mucous membranes assume a yellowish hue. Reason: Yellow pigment bilirubin imparts pale yellow colour to blood plasma.

Assertion: No taste sensation is evoked when a drop of distilled water is put on human tongue. Reason: Man does not possess taste buds for tasting water.

Assertion: Oxytocin is also known as Anti-diuretic hormone (ADH). Reason: Oxytocin can cause an increase in the renal reabsorption of water.

What is the source of Eco R I?

First clinical gene therapy was given in 1992 to a 4 years old girl for

In the given diagram A and B represent

In a 50 gm living tissue, what would be the amount of water?

Which of the following elements is present in very less quantity in the body?

Which of the following statements is correct ? 1. Common cold - 2013 Droplet Infection. 2. Typhoid - 2013 Contaminated food & water. 3. AIDS - 2013 Shaking hands. 4. Ringworm - 2013 Using infected towels.

Which of the following statements is correct?

Tendon and ligament are example of

If medulla oblongata is destroyed then which of the following functions will be effected?

Which of the following statements is correct?

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters?

Which of the following is a correct match?

Which of the following is an incorrect statement?

Which one of the following is correct regarding the excretion ?

In assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in Fallopian tube?

The opening between the right atrium and the right ventricle is guarded by the valve named

Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour? Protein Colour Property

Assertion : Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier. Reason : Enzymes are highly substrate specific catalysts.