تمارين اونلاين Biology || Unit 1 Lesson 3

The opposite graph shows the effect of PH on the activity of tow enzymes

At which pH value is the activity of both enzymes the same

On eating a piece of bread, which of the following enzymes will start its action first ?

Which of the following figures illustrates a starch molecule, after being digested in the mouth?

The opposite graph illustrates the production of substance (Y), when the enzyme works on a starch solution. So, the substance (Y) is……………..

The action of salivary amylase enzyme stops in the stomach, due to the………

Bile juice plays an important role in accelerating the activity of ……….enzyme

When trypsin is added to a suspension of egg protein in a test tube and kept at 37 ⁰ C. After 8 minutes, the protein changes from cloudy to transparent. Which of the following products will be present in the test tube now ?

The opposite diagram shows the human alimentary canal. In which structure is most of glucose absorbed into the blood?

The opposite graph shows the results of an experiment in which the activity of an enzyme was measured at different pH values. In which part of the alimentary canal would this enzyme be likely work?

A person ate food (X) that was not affected by the enzymes, until it reached the duodenum. What was in the food (X)?

The action of each of…………………. is required to absorb A, D and K vitamins

In order for the vitamin (B) to reach the heart, it passes through each of the following,except the…………….

The small intestine of cows is similar in general structure and function to the small intestine of humans. A disease in cows reduces the number of Villi in their small intestine, therefore they lose weight and become weak. What explains this?