AQA Combined Science Higher Exam: Biology Paper 1 Practical Quiz

What is the main focus of this video tutorial?

• Chemistry Paper 1 practicals

• Mathematics Paper 1 practicals

• Physics Paper 1 practicals

• Biology Paper 1 practicals

Which chemical is used to test for the presence of starch in food samples?

• Iodine

• Sudan 3

• Benedict's solution

• Biuret solution

What color change indicates a positive result for sugar in the Benedict's test?

• Orange to green

• Orange to purple

• Blue to orange

• Blue to black

In the protein test, what solution is added to the food sample?

• Iodine

• Benedict's solution

• Biuret solution

• Sudan 3

What is the optimum temperature for enzyme activity in the practical?

• 25 degrees Celsius

• 75 degrees Celsius

• 37 degrees Celsius

• 50 degrees Celsius

What is the purpose of using a spotting tile in the enzyme practical?

• To heat samples

• To observe color changes

• To measure temperature

• To mix solutions

How is the rate of enzyme activity calculated in this practical?

• 1000 divided by time

• Time multiplied by 1000

• Time divided by 1000

• Temperature divided by time

What is the independent variable in the photosynthesis practical?

• Type of pond weed

• Number of bubbles

• Distance between lamp and pond weed

• Temperature of water

What is the relationship between light intensity and distance in the photosynthesis practical?

• Directly proportional

• Inversely proportional

• Unrelated

• Exponentially proportional

Which type of lamp is recommended to control temperature in the photosynthesis practical?

• Incandescent lamp

• LED lamp

• Filament lamp

• Halogen lamp