Free Breathing And Exchange Of Gases (Daily Quiz: 6) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

(a) Diaphragm

(b) Neck

(c) Epiglottis

(d) Tongue

Question-2

The binding of an $O_2$ atom to the first iron atom of a haemoglobin molecule

(a) produces a conformational change that lowers the other subunits' affinity for oxygen

(b) is an example of cooperativity as $O_2$ readily binds to the other subunits.

(c) occurs at a very low partial pressure of oxygen

(d) occurs more readily at a lower pH value.

Question-3

The adult frog does not respire through

(a) Gills

(b) Buccopharyngeal cavity

(c) Skin

(d) Lungs

Question-4

Combining of haemoglobin with $O_{2}$ in lungs can be promoted by

(a) decreasing $O_{2}$ concentration in blood.

(b) decreasing $CO_{2}$ concentration in blood.

(c) increasing $CO_{2}$ concentration in blood.

(d) introducing $CO_{2}$ into blood.

Question-5

Which of the following has no specialized respiratory structures ?

(a) Earthworm

(b) Crab

(c) Salmon

(d) Ant