Question # 1

Classification means the grouping of organisms on the basis of:

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How they feed

The features they have in common

How they respire

How they can survive

Which of these materials is not a component of plasma membrane?

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Lipids

Carbohydrates

Proteins

DNA

Normal rate of heart beat in a healthy human being is ......... beats per minute.

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72

73

70

75

Uncoiling of chromosomes take place during:

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Anaphase

Telophase

Anaphase

Metaphase

............... is abbreviated from Adenosine Tri Phosphate.

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ATP

ADP

AMP

All

..................... Organisms cannot carry out photosynthesis.

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Autotrophic

Heterotrophic

Both

None

Which one of the following stages of cell division is very different for animal and plant cells?

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Prophase

Metaphase

Anaphase

Cytokinesis

ATP has ........... phosphate group.

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Two

Three

Four

Five

The breaking of one phosphate bond releases _________ kcal/mol of ATP.

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7.9

7.5

7.1

7.3

Almost all enzymes are:

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Carbohydrates

Fatty acids

Proteins

Vitamins

What reason would you suggest for the fact that the total DNA content of each daughter cell is reduced during meiosis?

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Chromosomes do not replicate during the interphase before meiosis 1

Chromosomes do not duplicate between meiosis 1 and 2

Half of the chromosomes form each gamete are broken

Sister chromatids separate during anaphase of meiosis 1

In living organisms, redox reactions involving the loss and gain of _____________ atom.

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Oxygen

Carbon

Nitrogen

Hydrogen

Where are the villi found?

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Esophagus

Stomach

Small intestine

large intestine

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