Oxygen is absorbed from air or water and made to combine with food and carbon dioxide is released.

Chlorophyll synthesises food From carbon dioxide and water in the presence of sunlight.

Oxygen absorbed from air or Water is made to combine with carbon dioxide to produce food.

Chlorophyll absorbs oxygen from air or water and releases carbon dioxide.

MCQ Questions for Class 7 Biology Respiration In Organisms Quiz 4

All living organisms need to respire to get the energy needed for their survival.

0%
True
0%
False

The percentage of oxygen and carbondioxide in inhaled air is?

0%
21% and 0.04%
0%
16.4% and 4.4%
0%
2% and 4%
0%
6% and 4%

Which of the following is incorrect about gills?

0%
Gills are projections of the skin in fishes.
0%
Gills are well supplied with blood vessels for exchange of gases.
0%
Gills in fish help them to use oxygen dissolved in water.
0%
Gills in fish help them to use carbondioxide dissolved in water.

In roots, which are underground, take in oxygen from __________.

0%
Soil
0%
Bacteria
0%
Root hairs
0%
Air

Each cell of an organism performs certain functions such as nutrition, transport, excretion and reproduction.

0%
True
0%
False

Anaerobic respiration__________.

0%
doesn't require CO2
0%
doesn't require oxygen
0%
requires oxygen
0%
requires CO2

In which of the following cellular respiration takes place?

0%
Plants
0%
Animals
0%
Unicellular organisms
0%
All of the above

Human breathe out air which is rich in ______.

0%
carbon dioxide
0%
oxygen
0%
Both A and B
0%
None of the above

State whether the given statement is True or False.

Plant can die if overwatered.

0%
True
0%
False

In earthworm, the exchange of gases occurs through the moist skin. In fishes it takes place through gills and in insects through the tracheae.

0%
True
0%
False

Increased physical activity doesn't enhances the rate of breathing.

0%
True
0%
False

The breakdown of _______ in the plant cells is similar to that in other living beings.

0%
Glucose
0%
Water
0%
Light
0%
All of the above

In respiration:

0%
Chlorophyll synthesises food From carbon dioxide and water in the presence of sunlight.
0%
Oxygen absorbed from air or Water is made to combine with carbon dioxide to produce food.
0%
Chlorophyll absorbs oxygen from air or water and releases carbon dioxide.
0%
Oxygen is absorbed from air or water and made to combine with food and carbon dioxide is released.

Usain Bolt, an Olympic runner, at the end end of a 100 meter sprint, will have more of which of the following in his muscles?

0%
ATP
0%
Alcohol
0%
Lactic acid
0%
Carbon dioxide

Explanation

$\textbf{Correct Option C}$

$\textbf{Solution}$

∙

$\bullet$ Usain Bolt is an olympic runner, and the muscles of runner are always under a continuous activity while they are running in the Olympics.To run fast he needs all the energy and his muscles need to respire quickly.

∙

$\bullet$ In order to meet this demand the muscles undergo anaerobic respiration in which the glucose particles breaks down without the requirement of oxygen and energy is released.

∙

$\bullet$ During this process lactic acid is produced instead of carbon dioxide and water. This lactic acid can cause cramps and muscle strain.

∙

$\bullet$ So the correct option is C.

Lime water turns milky when the exhaled air is expelled in the test tube because of the presence of

0%
Carbon dioxide
0%
Oxygen
0%
Nitrogen
0%
None of the above

Which of the following activities is characterised by minimum breathing rate?

0%
Sleeping
0%
Washing of clothes
0%
Cleaning of floor
0%
Dancing

The gas-exchange surfaces of aquatic animals are

0%
Tracheae
0%
Spiracles
0%
Gills
0%
Lungs

Explanation

Correct Option C

$\textbf{Correct Option C}$

Solution

$\textbf{Solution}$

∙

$\bullet$

Option A

$\textbf{Option A}$ Trachea is a a cartilaginous tube which connects the larynx to the bronchioles of the lungs tube and functions as the pathway for the oxygen to enter into human body. Its primary function is to carry the oxygen in and out of the lungs.

∙

$\bullet$

Option B

$\textbf{Option B}$ Spiracles are the the small openings in the respiratory tube. These are generally found in arthropods. Insects and other organisms breathe through these openings and exchange gases which are present in the thorax and the abdomen.

∙

$\bullet$

Option C

$\textbf{Option C}$ Gills are the gaseous exchange surface of aquatic animals. These are the branching organs which are located in the animals and have many blood vessels in them called capillaries which pics of the oxygen that's dissolved in the water and provides it to the organism.

∙

$\bullet$

Option D

$\textbf{Option D}$ Lungs are are the air filled organs which are located in the thorax cavity. There are millions of small air sacs present called really which help in the gaseous exchange in lungs. All vertebrate animals have lungs that live on land.

So, the correct option is C.

Which of the following situation is likely to cause muscle cramps?

0%
Glucose $\xrightarrow{Absence\, of\, Oxygen}\$ Lactic acid
0%
Glucose $\xrightarrow{Oxygen}\,$ Lactic acid
0%
Glucose $\xrightarrow{Absence\, of\, Oxygen}\$ Alcohol + CO $_2$
0%
Glucose $\xrightarrow{Oxygen}\,$ CO $_2$ + H $_2$ O

Insects have respiratory tubules also known as _______.

0%
Arteries
0%
Spiracles
0%
Trachea
0%
Veins

During aerobic respiration, energy is released in stepwise manner and ATP formation takes place with the help of this energy. What will happen if this energy is released at a single step instead of in parts?

0%
Incomplete oxidation of glucose takes place
0%
all the amount of energy can be utilized by the cell as more ATP molecules are produced
0%
maximum amount of this released energy is wasted in form of heat and cell may die
0%
cell will follow anaerobic pathway of respiration

Breathing rate ........... during physical exercise.

0%
Increases
0%
Decreases
0%
Remains same
0%
Decreases then increases

Which of the following is considered to be a breath

0%
2 inhalation + 2 exhalation
0%
1 inhalation + 2 exhalation
0%
2 inhalation + 1 exhalation
0%
1 inhalation + 1 exhalation

Accumulation of which of the following molecules in the muscles occurs as a result of vigorous exercise?

0%
Glycogen
0%
Pyruvic acid
0%
Glucose
0%
Lactic acid

Spiracle is the respiratory organ of:

0%
Cockroach
0%
Birds
0%
Earthworm
0%
Plants

In a cockroach, the air enters the body through ________.

0%
Lungs
0%
Gills
0%
Skin
0%
Spiracles

CBSE Questions for Class 7 Biology Respiration In Organisms Quiz 4 - MCQExams.com

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Practice Class 7 Biology Quiz Questions and Answers

CBSE Questions for Class 7 Biology Respiration In Organisms Quiz 4 - MCQExams.com

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Practice Class 7 Biology Quiz Questions and Answers

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