Respiration : Biology MCQ Practice Questions & Answers (Tamil)

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1.

The Bronchial tree is connected with the brain by

A

Trigeminal nerve

B

Phrenic nerve

C

Vagus nerve

D

Trochlear nerve

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2.

Hering Breur Reflex serves as a protective mechanism to prevent

A

Excess lung inflation

B

Excess oxygenation

C

All these

D

Tracheal collapsing

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3.

The chief difference between Trachea and Bronchioles is

A

Trachea lacks cartilage

B

Bronchiole lacks cartilage

C

Trachea is long

D

Bronchiole is small

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4.

At high altitude, the number of RBC increases

A

To trap $O_2$ from rarefied air having low $PO_2$

B

To adapt with the oxygen deficiency

C

To remove more $CO_2$

D

To increase metabolism

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5.

Bohr effect shifts the $O_2$ – Hb dissociation curve to right

A

To promote oxygenation of Hb in lungs

B

To increase $O_2$ concentration

C

To decrease $CO_2$ concentration

D

To decrease the pH of blood

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6.

Spirometry is used

A

To detect the amount of Hemoglobin

B

To detect the air flow through the respiratory system

C

To check the respiratory quotient

D

None of these

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7.

Pulmonary ventilation is

A

Tidal volume + Respiratory rate

B

Tidal volume + Vital capacity

C

Tidal volume + Residual volume

D

Tidal volume + Inspiratory reserve volume

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8.

Cloacal respiration is found in

A

Snake

B

Turtle and Tortoise

C

Crocodile

D

Frog

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9.

Myoglobin is a muscle hemoglobin which exhibits Hyperbolic oxygen dissociation curve indicating its great affinity towards Oxygen ( Non cooperative binding ). The Hyperbolic nature of the curve is due to

A

Single polypeptide ( 153 amino acids ) and Monomeric nature

B

High concentration in the muscle

C

Muscle protein

D

Quarternary structure

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10.

Which one is a Non – reversible pulmonary disease in which the bronchi are blocked with mucous and infection and rupture of alveoli

A

Silicosis

B

Asphyxia

C

Emphysema

D

Embolism

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11.

Advantage of Double Bohr effect is

A

Reciprocal exchange of Oxygen for Carbon dioxide

B

More Oxygenation of Foetal blood

C

More removal of Carbon dioxide

D

All these

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12.

Tachypnoea means

A

Rapid shallow breathing

B

Rapid deep breathing

C

Slow and shallow breathing

D

Slow and deep breathing

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13.

Carbonic anhydrase in the RBC is the fastest enzyme and it decompose in one second for fast action. Its concentration in the blood due to the presence of

A

Plasma

B

Carbon dioxide

C

Sodium ions

D

Hemoglobin

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14.

The common drugs used against TB is

A

Para amino salicylic acid ( PAS )

B

Ethambutol

C

Steptomycin

D

All these

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15.

Oxygen dissociation curve shows the relation between

A

Oxyhemoglobin saturation and Oxygen tension

B

Oxyhemoglobin saturation and Carbon dioxide level

C

Oxyhemoglobin formation and dissociation

D

Partial pressure of Oxygen and Partial pressure of Carbon dioxide

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16.

Which of the following gas mixture is used by Divers to prevent Oxygen toxicity

A

Oxygen and $CO_2$

B

Oxygen and Nitrogen

C

Oxygen and rare gases

D

Oxygen, $CO_2$ and Nitrogen

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17.

The Alveolar epithelium is lined with

A

Non- ciliated Squamous epithelium

B

Ciliated Squamous epithelium

C

Ciliated epithelium

D

Ciliated Columnar epithelium

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18.

The impulse for voluntary muscles for forceful breathing starts in

A

Spinal cord

B

Medulla ( Pons )

C

Vagus nerve

D

Cerebral hemispheres

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19.

In which part of the body Mycobacterium tuberculosis affects

A

All these

B

Lungs

C

Skin and Meninges

D

Intestine

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20.

Opercular gills are found in

A

Both a and b

B

Lepidosteus

C

Polypterus

D

Anabas

Respiration in Biology : Practice MCQ Questions & Answers with Explanations