Test: Respiration in Organisms- 1

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This mock test of Test: Respiration in Organisms- 1 for UPSC helps you for every UPSC entrance exam. This contains 10 Multiple Choice Questions for UPSC Test: Respiration in Organisms- 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Respiration in Organisms- 1 quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Test: Respiration in Organisms- 1 exercise for a better result in the exam. You can find other Test: Respiration in Organisms- 1 extra questions, long questions & short questions for UPSC on EduRev as well by searching above.

QUESTION: 1

In insects, air enters the body through

A.
Spiracles
B.
Gills
C.
Lungs
D.
Skin

Solution:

Insect bodies have openings, called spiracles, along the thorax and abdomen. These openings connect to the tubular network, allowing oxygen to pass into the body, regulating the diffusion of CO₂ and water vapor.

Air enters and leaves the tracheal system through the spiracles.

QUESTION: 2

During exhalation, the ribs move

A.
Outwards
B.
Downwards
C.
Upwards
D.
To normal position

Solution:

The process of releasing air during respiration is called exhalation. During exhalation, the ribs move downwards to reduce the volume of thoracic cavity.

QUESTION: 3

Plants breathe through their stomata located in their

A.
Leaves
B.
Stem
C.
Flowers
D.
Roots

Solution:

Stomata are small openings on the leaves surface through which exchange of gases takes place in plants.

QUESTION: 4

Gills are respiratory organs in

A.
Fish
B.
Cockroach
C.
Amoeba
D.
Earthworm

Solution:

Gills are respiratory organs in fish. Gills intake oxygen from water.

QUESTION: 5

Breathing is a

A.
Biochemical process
B.
Biological process
C.
Chemical process
D.
Physical process

Solution:

Breathing may be defined as the process of taking in oxygen from the environment and giving out carbon dioxide So, breathing is just a physical process in which no energy is released.
On the other hand, the process of respiration is more complex. It involves the inhalation of air, absorption and transport of oxygen to various cells of the body, oxidation of food in the cells and elimination of carbon dioxide from the body. Thus, respiration is a biochemical process.

QUESTION: 6

In anaerobic respiration which chemical substance is produced?

A.
Lactic acid
B.
Alcohol
C.
Both A and B
D.
None of these

Solution:

The correct option is Option C.

Anaerobic respiration occurs in the absence of oxygen and is less efficient than aerobic respiration. Unlike aerobic respiration, the end products here are ethyl alcohol as in alcoholic fermentation and lactic acid as in animal cells.

QUESTION: 7

Blood is red coloured due to presence of

A.
Leucoplast
B.
Haemoglobin
C.
Plastids
D.
Chloroplast

Solution:

Blood is red coloured due to presence of haemoglobin pigment that carries oxygen.

QUESTION: 8

Inhalation is the

A.
Release of oxygen
B.
Intake of carbon dioxide
C.
Intake of oxygen
D.
Release of carbon dioxide

Solution:

The part of breathing during which oxygen rich air is taken in is called inhalation.

QUESTION: 9

More energy is released in

A.
Breathing
B.
Fermentation
C.
Anaerobic respiration
D.
Aerobic respiration

Solution:

During aerobic respiration, complete oxidation of food takes place and more energy is released in form of ATP.

QUESTION: 10

The opening of the pharynx to larynx is guarded by

A.
Adam’s apple
B.
Epiglottis
C.
Alveoli
D.
Trachea

Solution:

Pharynx opens in larynx through glottis which is guarded by a leaf like unpaired cartilage which is called epiglottis. It prevents the entrance of food into trachea.