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Biology

Biology
Number of chromosomes in Down's syndrome is

46
47
48
49

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Biology
Enzymes are important because they

Maintain cell shape
Contain water
Transfer genetic information
Speeds up chemical reactions

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Biology
In the cell of animals ,some micro-organisms and lower plants contain

Two centriole
Three centriole
One centriole
Four centriole

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Biology
Strongest bone of body is found in

Thigh
Jaw
Shoulder
Neck

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Biology
Plant have ____ while animals lack it.

cellulose
starch
protein
fat

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Biology
Which statement is one component of the cell theory?

All living cells arise from pre-existing cells
DNA is the basis of genetic transfer
Tissues are formed from combinations of cells
All cells are composed of same organelles

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