When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of (a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour
(b) carbon dioxide
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baam
Lose 20 points!
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star
Double points!
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rocket
Go to first place!
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baam
Lose 10 points!
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5
Lack of oxygen in muscles often leads to cramps among cricketers. This results due to (a) conversion of pyruvate to ethanol (b) conversion of pyruvate to glucose (c) non conversion of glucose to pyruvate (d) conversion of pyruvate to lactic
(d) conversion of pyruvate to lactic acid
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5
Plants store most of their wastes in the membrane bound structures called âĶâĶâĶâĶâĶ present in their cells.
The tubular parts of the nephron selectively âĶâĶâĶâĶâĶ the substances needed by the body.
reabsorbs
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5
Which is the first enzyme to mix with food i the digestive tract? (a) Pepsin (b) Cellulose (c) Amylase (d) Trypsin
(c) Amylase
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5
The part where the exchange of gases occurs during respiration is: (a) Lungs and larynx (b) Alveoli and throat (c) Throat and lungs (d) Alveoli and capillaries
(d) Alveoli and capillaries
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5
In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body? (a) Pisces and amphibians (b) Amphibians and reptiles (c) Amphibians only (d) Pisces only
(d) Pisces only
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5
Fishes have a heart with âĶâĶâĶâĶâĶ chambers while the amphibians have âĶâĶâĶâĶâĶ chambers in their heart.
2, 3
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5
The enzyme responsible for the digestion of proteins in the small intestine is: (a) Pepsin (b) Trypsin (c) Amylase (d) Lipase
(b) Trypsin
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5
The major driving force for the water in the xylem during day time is the âĶâĶâĶâĶâĶ
transpiration pull
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5
The process of digestion is completed by: (a) Intestinal juice (b) trypsin (c) bile juice (d) pepsin
(a) Intestinal juice
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5
The extracellular fluid released from the capillaries is: (a) serum (b) plasma (c) lymph (d) mucus