EASY
AS and A Level
IMPORTANT
Earn 100
Which diagram best represents the arrangement of water molecules around sodium (Na+) and chloride (Cl-) ions in solution?
50% studentsanswered this correctly
Important Questions on Biological Molecules
EASY
AS and A Level
IMPORTANT
Try making models of or drawing these molecules:
methane, CH4
EASY
AS and A Level
IMPORTANT
Try making models of or drawing these molecules:
water, H20
EASY
AS and A Level
IMPORTANT
Try making models of or drawing these molecules:
a hydrocarbon, e.g. C3H8
EASY
AS and A Level
IMPORTANT
Try making models of or drawing these molecules:
ammonia, NH3
EASY
AS and A Level
IMPORTANT
Try making models of or drawing these molecules:
ethanoic acid, CH3COOH
EASY
AS and A Level
IMPORTANT
Why do you need to use excess Benedict's reagent to find the concentration of a sugar solution?
MEDIUM
AS and A Level
IMPORTANT
Outline how you could use the Benedict's test to estimate the concentration of a solution of a reducing sugar.
MEDIUM
AS and A Level
IMPORTANT
Copy the table and complete both the columns. The table shows some functions of proteins, with examples of proteins that carry out these functions.
| Function | Example |
| structural |
1 2 |
| enzyme | |
| insulin | |
| haemoglobin and myoglobin | |
| defence | |
| actin and myosin | |
| storage |
