1 markWhich row shows the three main elements from the Period Table that are present in most molecules in living organisms?
A | carbon | oxygen | nitrogen |
B | hydrogen | carbon | oxygen |
C | oxygen | sulfur | carbon |
D | hydrogen | carbon | nitrogen |
Did this page help you?
1 markThe drawing shows a food test being carried out in a laboratory.
Which food test is being shown and which food group is being tested for?
Biuret test for proteins
DCPIP test for Vitamin C
Benedict's test for reducing sugars
Emulsion test for fats
Did this page help you?
1 markWhich row represents the three main constituents of a DNA nucleotide?
A | bases | phosphate | nucleus |
B | deoxyribose sugar | nucleus | chromosome |
C | bases | deoxyribose sugar | phosphate |
D | phosphate | chromosome | bases |
Did this page help you?
Large biological molecules are made from smaller molecules.
Which row shows the correct molecules?
| starch | protein | lipid | DNA |
A | fatty acids and glycerol | nucleotides | glucose | amino acids |
B | glucose | fatty acids and glycerol | nucleotides | amino acids |
C | nucleotides | amino acids | fatty acids and glycerol | glucose |
D | glucose | amino acids | fatty acids and glycerol | nucleotides |
Did this page help you?
1 markThe table below shows the elements and basic units used by cells to make large biological molecules.
| basic units | elements | large molecule |
A | amino acid | carbon, hydrogen, oxygen, nitrogen | protein |
B | glycerol | carbon, hydrogen, oxygen, nitrogen | fats |
C | glycerol | carbon, hydrogen, nitrogen | fats |
D | amino acid | carbon, hydrogen, oxygen | DNA |
Which row of the table is correct?
Did this page help you?