Biological Molecules Quiz 5

1) 3 wells were cut in Agar Jelly which contained starch. A different solution was placed in each well. 12 hours later, the Jelly was flooded with iodine solution. The diagram shows the final appearance of the Jelly. Which solution could have given the results shown?

2) A dish was prepared with Agar Jelly containing stars. Four holes were cut in the Jelly and each hole was filled with the substances shown in the diagram. After 30 minutes, iodine solution was poured over the Jelly. Which hole would be surrounded by the largest yellow- brown region?

3) Which graph shows how temperature affects the rate of an enzyme controlled reaction?

4) The diagram represent the activity of an enzyme. What are labeled structures?

5) A sample of food mixed with water was tested to find out its contents. The results are shown in the table.

Which conclusion can be made from these results?

6) Four test tube are set up as shown. 5 drops of hydrocholric acid added to tubes 1, 2, and 3. All four tubes are then placed in a water-bath at 37 degrees celsius for 20 minutes. What is the result?

7) The graph shows changing energy levels during a reaction with and without the presence of the enzyme specific to this reaction. What is the activation energy of the reaction without the enzyme?

8) Six bean seeds were soaked in water for 24 hours. Three of them were then boiled and cooled. The boiled and the non-boiled seeds were placed on the surface of agar jelly containing starch. After two days, all the seeds were removed and the Jelly was flooded with iodine solution. The diagram shows the result of the experiment.

What does the experiment show about non boiled bean seeds?

9) Four equal masses of different foods were burned as shown. The temperature of the water was measured before and after each food sample was burned. The results are shown in the table Which food sample is likely to contain most fat?