AIIMS Zoology Class 11 Questions

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

Na⁺/K⁺ pump is associated with

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).

Catecholamine in a normal person induces

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

Oxygen binding to haemoglobin in blood is

What is common between earthworm and Periplaneta?

Select the option having all correctly matched pairs.

Ventricular diastole occurs due to a/an

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

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?

Tendon and ligament are example of

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

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 ?

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.

Assertion : Glycerides are important nutrients for body. Reason : Glycerides are hydrolysed into glycerol and fatty acids which are further absorbed in intestine by the formation of chylomicron.

Assertion : Blood in cockroach is colourless haemolymph with no respiratory pigment. Reason : Respiration in cockroach occurs through diffusion in haemolymph.

Assertion : Blood group 'O' have anti-A & anti-B antibodies. Reason : It does not have any antigens.

Assertion : S.A. node induces excitatory impulses in heart. Reason : S.A. node is self excitatory.

Vitamin B₆ is also called

Which of the following is correct about the given figure?

Which of the following have porous body and are diploblastic?

Which one is correct regarding electrocardiograph (ECG)?

What is the effect of GnRH produced by hypothalamus?

Chemosensitive area of respiratory centre in medulla is affected by

The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and bronchi are known as

Assertion : Adrenaline is called an emergency hormone. Reason : It acts on the cells of skeletal, cardiac, smooth muscles, blood vessels and fat cells.

Assertion : In cockroach respiratory gases directly comes in contact with the various organs of the body.

Assertion: While on going down the loop of Henle, the filtrate becomes hypotonic. Reason: The descending limb of loop of Henle is impermeable to both water and electrolytes.

Assertion: Emphysema is a chronic disorder in which alveolar walls are damaged. Reason: Emphysema is closely related to cigarette smoking.

Assertion: Insulin is antagonistic to glucagon. Reason: It is an anabolic hormone.

What is diapedesis?

Which one feature is common to leech, cockroach and scorpion?

The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and small bronchi are known as

Which one of the following is a sesamoid bone?

Respiration is controlled by

Cotton fibres mainly contains

Which of the following sugars is not found in plants?

Assertion: Connective tissue inside the brain is essential for conduction of nerve impulse. Reason: Connective tissue hold together the nerve cells of brain.

Assertion: Mammary glands are apocrine glands. Reason: The distal part containing secretory granules break down and leaves as a secretion.