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RESPIRATION

Total questions: 10

Worksheet time: 7mins

Name
Class
Date
1.

When air is blown into limewater, it turns milky because of the presence of __________in exhaled air

a)

nitrogen

b)

oxygen

c)

carbon dioxide

d)

milk

2.

Glucose is converted into pyruvate in ______________

a)

Mitochondria

b)

Cytoplasm

3.

When yeast respires anaerobically, it produces energy, carbon dioxide and _____________

a)

Ethanol

b)

Lactic acid

4.

Pyruvate is converted into energy and lactic acid, during anaerobic respiration in ________________

a)

Mitochondria

b)

Muscles

5.

___________________ is the energy currency of cells, and is found in mitochondria

a)

Adenosine tri phosphate

b)

Adenosine monophosphate

6.

In green plants, at night ____________gas is released into air.

a)

Oxygen

b)

Carbon dioxide

7.

During breathing, fishes take in water containing dissolved oxygen through ______________

a)

Mouth

b)

Gills

8.

In humans, trachea is supported by rings of _____________to make sure that the air passage do not collapse

a)

Bones

b)

Cartilage

c)

Muscles

9.

In lungs, ___________________ provides a surface for gas exchange.

a)

Bronchi

b)

Bronchioles

c)

Alveoli

10.

When we breathe in, we lift our ribs and diaphagm muscle is _______________that causes chest cavity to become large and air enters into lungs.

a)

Flattened

b)

raised up