topic 1

Question 1

cell theory

Answer 1

cells are the basic structural and functional units of all living things

Question 2

define metabolism

Answer 2

ALL chemical reactions that happen inside a cell in order to keep it alive and functioning correctly

Question 3

define catabolism

Answer 3

breaking down
-larger molecules are broken down into smaller ones
-involves releasing energy

Question 4

types of compounds involved in metabolism

Answer 4

they are classified as organic or inorganic

-organic: large molecules (more than 5-6 atoms) and contains CARBON
eg. amino acids

-inorganic: small and/or do not contain CARBON
eg. carbon dioxide

Question 5

important inorganic compounds

Answer 5

water, vitamins, minerals, oxygen and carbon dioxide

Question 6

define carbohydrates

Answer 6

always contain C, O and H
always twice as much hydrogens and oxygens
-they are an important source of energy for cells (eg.glucose)

the C,H,O are always arranged in rings

they can be classified according to how many rings they contain

Question 7

types of carbohydrates:

monosaccharides

Answer 7

one simple sugar ring

Question 8

what is an enzyme

Answer 8

a biological catalyst
they speed up a reaction but are not used up in a reaction
they lower the activation energy needed for collisions to be successful, therefore more particles have enough energy to react, making the reaction to occur at a faster rate.