inorganic substances

Question 1

functions

Answer 1

break down large organic compounds into small substances
transport food down the alimentary canal
dissolves waste products produced by the body , in the form of urine and sweat

Question 2

inorganic substances

Answer 2

does not contain carbon

Question 3

organic substance

Answer 3

contains carbon and hydrogen

Question 4

what is a building block

Answer 4

smaller/simplest unit of a substance (monomers)

Question 5

carbohydrates

Answer 5

made up of carbon, hydrogen and oxygen
ratio is ( 2h:o)
monosacchiride is the building blocks of carbohydrates e.g glucose, fructose
disaccharides is made up of 2 monosacchirides that have bonded together e.g maltose, lactose
polysaccharides is made up of more than 2 monosaccharides e.g starch , glycogen and cellulose

Question 6

function of carbohydrates in animals and plants

Answer 6

source of energy
storage polysacchirides
gives plants sterngth

Question 7

lipids

Answer 7

made up of carbon, hydrogen, oxygen and phosphorous
ratio is greater than 2:1
building blocks are (1)glycerol and (3)fatty acids
saturated fats they are solid at room temperature
unsaturated fats they are liquid at room temperature

Question 8

function of lipids in animals and plants

Answer 8

store large amounts of energy
maintain body temperature
help to insulate body organs against shock

Question 9

proteins

Answer 9

made up of carbon, hydrogen,oxygen and nitrogen
building blocks are called amino acids
two amino acids are called dipeptides
three or more amino acids are called polypeptides
changes in ph and temperature can change the structure of the protein and it becomes denatured resulting loss of the function and structurre of the protein

Question 10

function of protein

Answer 10

cell combination and in the immune system
energy reserve
catalysing cellular reactions that form part of metabolism

Question 11

what are the chromosomes in the nucleus of a cell

Answer 11

dna- deoxyribonucleic acid
rna - ribonucleic acid

Question 12

dna

Answer 12

carries all the info which makes you unique to everyone else ,controls the inherrritance of characteristics
small units - nucleotides

Question 13

rna

Answer 13

found in the cytoplasm in the ribosomes
single stranded
involved in protein synthesis
transferring genetic info from dna to form proteins found on ribosomes in the cytoplasm and in the nucleus

Question 14

vitamins

Answer 14

complex organics compounds
small quantities in food
vitamins are co enzymes
responsible for regulating metabolism