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CBSE Notes 2011-2012 » X-Science-Part1

Life Processes

Which is the first enzyme to mix with food in the digestive tract ?

Multiple choice question

Which is the first enzyme to mix with food in the digestive tract ?

Which of the following statement(s) is (are) correct ? ...

Multiple choice question

Which of the following statement(s) is (are) correct ? (i) Pyruvate can be converted into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration.

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

Multiple choice question

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

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

Multiple choice question

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

The opening and closing of the stomatal pore depends upon

Multiple choice question

The opening and closing of the stomatal pore depends upon

Choose the forms in which most plants absorb nitrogen : ...

Multiple choice question

Choose the forms in which most plants absorb nitrogen : (i) Proteins (ii) Nitrates and Nitrites
(iii) Urea (iv) Atmospheric nitrogen

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