Nutrition
1. This question has 4 part(s).
1.1. The graph below shows the effect of temperature on the rate of an enzyme-catalysed reaction.
Explain why the rate of an enzyme-catalysed reaction decreases after point B.
1.2. A scientist investigated how the digestive enzyme amylase breaks down starch into sugar maltose.
He added the enzyme to a solution of starch and measured the concentration of starch every 10 minutes.
The results are shown in the table below.
Time / min | Concentration of starch / mg cm -3 |
|---|---|
0 | 17.2 |
10 | 11.1 |
20 | 7.2 |
30 | 5.3 |
40 | 4.2 |
Rate of reaction can be calculated using the following equation:
Calculate the average rate of the reaction between 0 and 20 minutes.
1.3. Bile is a secretion that helps with digestion.
State one way in which bile aids digestion.
1.4. The diagram below shows the organs of the human digestive system.
(i) Bile is produced by organ X
Name organ X.
(1)
(ii) Identify the organ in which bile is stored after it is produced.
(1)
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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