midterm part 4 lesson 10

The right and left cerebral hemispheres are separated from each other by:

• gyrus

• sulcus

• longitudal fissure

• none of the above

Even if you don't know the pH of Hyaluronic acid, which of the following could it be?

• pH 7.8

• pH13.2

• pH 10.4

• ph 2.1

The following can denature an enzyme, except:

• High temperature

• Extreme pH (acid or alkali)

• High pressure

• Low pressure

• High concentration of salt

Which of the following is NOT true about enzymes?

• All enzymes catalyze reactions going only one way

• The active site of the enzyme is the place where a chemical bond gets broken or formed

• Enzymes speed up chemical reactions without participating in them

• An enzyme undergoes a conformational change upon the completion of a reaction

Which of the following is a Cofactor for an enzyme that copies DNA?

• Folic acid

• zinc

• Ascorbic Acid

• Vitamin B12

Which of the following is NOT true about coenzymes and cofactors?

• Coenzymes are derived from vitamins

• Cofactors are recycled and reused by the body

• Coenzymes and cofactors must be ingested in large amounts for the enzymes to have enough

• Vitamins and Minerals belong in the category of Micronutrients.

Which of the following is NOT true about pH scale?

• The solution that has a high concentration of hydrogen protons will have a high pH number

• The solution that has a low concentration of hydrogen protons is considered alkaline

• Acid is a substance that increases the hydrogen proton concentration in a solution

• Base is a substance that has a high pH number

The part of the enzyme where reactants attach is called:

• Substrate

• Binding site

• Active site

• Enzyme-substrate complex

Enzymes usually catalyze a reaction only for specific substrates because of the specific shape of:

• The binding site pockets

• the active site

• The products of the reaction

• The type of the reaction it catalyzes

The following is Incorrect about pH scale:

• A solution with a very high concentration of hydrogen protons will have a high pH number

• A solution with a low concentration of hydrogen protons is considered alkaline

• Any pH number below 7 is considered acidic

• pH of 14 indicates a very strong alkali