A student investigated the effect of pH on amylase. They added a sample of each reaction mixture to iodine solution every 30 seconds. The temperature and the other conditions were kept the same.

Time after adding starch (s)	Iodine result at pH 6	Iodine result at pH 8
0	Blue-black	Blue-black
30	Blue-black	Blue-black
60	Blue-black	Blue-black
90	Blue-black	Orange-brown
120	Blue-black	Orange-brown
150	Orange-brown	Orange-brown

Explain at which pH the amylase digested the starch faster.

A student investigated the effect of pH on amylase. They added a sample of each reaction mixture to iodine solution every 30 seconds. The temperature and the other conditions were kept the same.

Time after adding starch (s)	Iodine result at pH 6	Iodine result at pH 8
0	Blue-black	Blue-black
30	Blue-black	Blue-black
60	Blue-black	Blue-black
90	Blue-black	Orange-brown
120	Blue-black	Orange-brown
150	Orange-brown	Orange-brown

Explain at which pH the amylase digested the starch faster.

2.2 Animal tissues, organs and organ systems

Question 54

Markscheme

2.2 Animal tissues, organs and organ systems

Question 54

Markscheme

2.2 Animal tissues, organs and organ systems

Question 54

2.2 Animal tissues, organs and organ systems Questions

2.2 Animal tissues, organs and organ systems

Question 54

2.2 Animal tissues, organs and organ systems Questions