Bio 2

This investigation was performed again with identical conditions except with a hydrogen peroxide solution at pH 8. Predict the number of mL of gas that was collected in one minute.

10 ml (ph = 8)

Base your answer(s) to the following question(s) on the information below. Some carbonated beverages are made by forcing carbon dioxide gas into a beverage solution. When a bottle of one kind of carbonated beverage is first opened, the beverage has a ph value of 3. State, in terms of the pH scale, why this beverage is classified as acidic.

Because, it is closest to 0, (most acidic) on the ph scale.

Many hormones are proteins used in cellular communication. Each hormone carries a specific message to specific target cells. State why each of these hormones is able to deliver a different message.

Each hormone has a specific shape that enables it to interact with a specifically shaped receptor (lock n key model)

The shape of a protein determines its

Functions inside and outside of cells

Base your answer to the following question on the information below and on your knowledge of biology. Enzyme Investigation An enzyme was isolated from digestive juices taken from the small intestine. An experiment was set up to test the ability of the enzyme to break down protein. Two test tubes, labeled A and B, were placed in a hot water bath at 37 C, human body temperature. Test tube A contained only protein and test tube B contained protein and the enzyme. The chart below shows the set-up. Test Tube - Contents A -protein B - protein, enzyme After two hours, the contents of both test tubes were analyzed. Test tube A showed only the presence of protein. Test tube B showed the presence of the end products of protein digestion, indicating the enzyme had successfully broken down the protein. State what the result would be if the same enzyme that was added to test tube B was added to a test tube containing starch. Support your answer.

Starch is NOT a protein therefore, nothing happens. ( no digestion )

The diagram below shows typical pH values found in four parts of the human digestive system. In the small intestine, the enzyme lipase acts as a catalyst, increasing the rate of fat digestion. Which labeled part of the digestive system has the most acidic environment?

Stomach ph = 2.0

Explain the importance of temperature in the functioning of enzymes.

Temperature affects the shape of an enzyme. Therefore, it is a function.

Which statement is most likely correct regarding soil bacteria that inhabit the polar regions of Earth?

They contain enzymes that function at low temperatures.

In the diagram below, X represents a process that causes a protein to unfold and stop functioning. Process X is most likely caused by

an internal factor in the body, such as a temperature increase

Based on the investigation, the student should conclude that enzymes

function best within a specific range of conditions

A fully functioning enzyme molecule is arranged in a complex three-dimensional shape. This shape determines the

specific type of molecule it interacts with during a reaction