AP Biology Unit 7 Review

Which of the following solutions has the greatest concentration of hydrogen ions [H+]?

• gastric juice at pH 2

• vinegar at pH 3

• tomato juice at pH 4

Pure, freshly-distilled water has a pH of 7. This means that

• there are no H+ ions in the water.

• the concentration of H+ ions in the water equals the concentration of OH- ions in the water.

• the concentration of H+ ions in the water is 7 times the concentration of OH- ions in the water.

Which of the following statements is/are true regarding the chemical reaction illustrated in the Figure?

• It is a hydrolysis reaction.

• It results in a peptide bond.

• It joins two fatty acids together.

Tags

NGSS.HS-LS1-6

Which type of chemical bond involves the transfer of electrons from one atom to another, resulting in oppositely charged ions that are attracted to each other?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Van der Waals interactions

Tags

NGSS.HS-PS1-1

Which of the following molecules is a carbohydrate?

• Palmitic Acid

• Collagen

• Insulin

• Lactose

Tags

NGSS.HS-LS1-6

Which of the following statements correctly describes the difference between saturated and unsaturated fats?

• Saturated fats tend to be solid at room temperature; unsaturated fats are liquid at room temperature

• Saturated fats are cannot pack together closely because of their bent structure; unsaturated fats can pack together because they are flat

• Saturated fats come from plants and fish; unsaturated fats are from animals (except fish)

• Saturated fats are considered “healthy” fats; unsaturated fats may contribute to cardiovascular disease

Which of the following is most closely related to the secondary structure of proteins?

• lipids

• peptide bonds

• alpha helix

• cellulose

The process by which protein conformation is lost or broken down is

• dehydration synthesis

• translation

• denaturation

• hydrolysis

Which two functional groups are always found in amino acids?

• amine and sulfhydryl

• hydroxyl and carboxyl

• carboxyl and amine

• phosphate group and nitrogenous base

Water is an excellent solvent. Select the property that justifies this statement.

• as a polar molecule, it can surround and dissolve ionic and polar molecules

• it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non polar molecules

• it forms hydrogen bonds with itself so cohesion is possible

• it is liquid and will adhere to many substances

Tags

NGSS.HS-ESS2-5