Tests for biological molecules were carried out on three solutions. Each solution contained only one type of biological molecule. The observations were as follows. Which solutions would contain either sucrose or amylase?

1, 2 and 3

1 and 3 only

2 and 3 only

2 only

Biology

IGCSE&ALevel

CAIE

Exam No：9700_s24_qp_12 Year：2024 Question No：9

Answer:

Knowledge points:

2.1.1 describe and carry out the Benedict’s test for reducing sugars, the iodine test for starch, the emulsion test for lipids and the biuret test for proteins

2.1.2 describe and carry out a semi-quantitative Benedict’s test on a reducing sugar solution by standardising the test and using the results (time to first colour change or comparison to colour standards) to estimate the concentration

2.1.3 describe and carry out a test to identify the presence of non-reducing sugars, using acid hydrolysis and Benedict’s solution

Tests for biological molecules were carried out on three solutions. Each solution contained only one type of biological molecule. The observations were as follows. Which solutions would contain either sucrose or amylase?

Answer:

Knowledge points:

Solution:

Related Question