Enzymes catalyse specific reactions by having an active site where the substrate fits.This theory is called:

The following figures are taken from a manufacturing account.


The cost of tie year's production of finished goods is

Biological catalysts in yeast are called:

All of the following are organelles EXCEPT for:

THE ITEM refer to the following family functions.

The family produces children and maintains the population.

The major plant nutrients written as NPK refer to phosphorus, nitrogen and:

You never find native magnesium because:

All of the following are possible consequences of global warming EXCEPT for:

When rotated through 90° about the origin in a clockwise direction, the image of the point (3, 1) is

In a water condenser the cooling water enters at:

A molecule of ethene can be described as all of these EXCEPT for:

Given that a and b are integers, which of the following is not necessarily an integer?

All of the following are features of a gas exchange surface EXCEPT for:

The density of seawater is:

The density of pure water is:

After Lloyd's father died, Lloyd invited his mother to live with his wife, his two sons and himself. The new family structure would be termed.

The simplest ratio of atoms in a compound is given by the:

A spring is 100 mm long when unstretched. A 40 N load is hung from it, and its total length increases to 120 mm. A different load on the spring causes it to become 150 mm long. If the spring obeys Hooke′s Law, this second load is:

In an ecosystem a population is:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

The headgear worn by the factory worker is made from artificial material.