Question # 1

Chromosomes condensation occurs during .............. .

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G1-phase

G2-phase

S-phase

Interphase

Down's sayndrome is an autosomal non-disjunction of chromosomes number ............. .

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22

12

21

14

Doforestation by uncontrolled cutting of trees means danger of _____________

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Green House effect

Soil erosion

Both a& b

None

Almost all enzymes are:

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Carbohydrates

Fatty acids

Proteins

Vitamins

When the last member of a particular species dies, the species is said to be______.

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Established

Extinct

Threatened

Endangered

Micronutrients of plants are:

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Available in the soil in small amounts

Required by plants in small amounts

Small molecules required by plants

Useful, but not required by the plants

An example of macromolecule is.

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Water

Glucose

Protein

NaCl

Smooth endoplasmic reticulum is the area in a cell where __________ are synthesized.

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Polysacchrides

Proteins

Lipids

DNA

Ribose is a _______ carbon sugar.

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Two

Three

Five

Ten

The part of mustard plant which yields oil is

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Leaf

Seed

Root

Flower

The grater the no. of stomata on leaf , the ............. would be transpiration.

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Higher

Lower

Remain constant

None

There is separation of oxygenated and deoxygenated blood in birds and mammals because:

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The ventricles are completely divided

The ventral aorta is divided into aortic and pulmonary trunk.

The aortic arch is divided into two systemic arches.

None of the above

There are _______________ major groups of plant tissues.

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1

2

3

4

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