MEDIUM
10th CBSE
IMPORTANT
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Which of the following is correct for the process of anaerobic respiration?

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Important Questions on Life Processes

MEDIUM
10th CBSE
IMPORTANT

Which of the following increases in muscle cells when they are lacking in oxygen?

HARD
10th CBSE
IMPORTANT

Internal respiration may be defined as:

MEDIUM
10th CBSE
IMPORTANT

When air is blown from the mouth into a test-tube containing lime water, the lime water turns milky due to the presence of

HARD
10th CBSE
IMPORTANT

Which of the following is the correct sequence of air passage during inhalation?

EASY
10th CBSE
IMPORTANT

Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to the conversion of pyruvate to

MEDIUM
10th CBSE
IMPORTANT

During the deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in

HARD
10th CBSE
IMPORTANT

Which of the following statements are correct?

(i) pyruvate can be converted into ethanol and carbon dioxide by yeast.

(ii) fermentation takes place in the case of aerobic bacteria.

(iii) fermentation takes place in mitochondria.

(iv) fermentation is a form of anaerobic respiration.

HARD
10th CBSE
IMPORTANT
Which of the following statements are true about respiration? 
(i) During inhalation, ribs move inward and the diaphragm is raised.
(ii) The gaseous exchange takes place in the alveoli.
(iii) Haemoglobin has a greater affinity for carbon dioxide than oxygen.
(iv) Alveoli increase surface area for the exchange of gases.