What is the difference between the forces that lead to secondary and tertiary structures in proteins?

secondary is due to hydrogen bonding of backbone ; tertiary is interactions of side chains

secondary is due to interactions of side chains ; tertiary is due to hydrogen bonding of backbone

no difference - they are both caused by hydrogen bonding

no difference - they are both caused by interactions of side chains

Which of the following are examples of nitrogenous bases?

adenine, guanine, cytosine, thymine

The four most common elements in living things are

c. carbon, hydrogen, oxygen, & nitrogen

a. neon, xenon, boron, & sulfur

b. neon, hydrogen, lithium, & helium

d. sodium, hydrogen, potassium, & calcium

Hydrocarbons are compounds that contain

Carbon, Oxygen, and Hydrogen, only

Carbon, Oxygen, Hydrogen, and Nitrogen, only

Research indicates that Ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that

are mirror images of one another

have identical three-dimensional shapes

differ in the location of their double bonds

Which of the following statements is false for the class of biological molecules known as lipids?

They are an important constituent of cell membranes

They contain more energy than proteins and carbohydrates.

There are 20 different amino acids. What makes one amino acid different from another?

different side chains (R groups) attached to an alpha (α) carbon

different carboxyl groups attached to an alpha (α) carbon

different amino groups attached to an alpha (α) carbon

Of the following functions, the major purpose of RNA is to

function in the synthesis of protein.

transmit genetic information to offspring.

make a copy of itself, thus ensuring genetic continuity.

act as a pattern or blueprint to form DNA.

Which of the following descriptions best fits the class of molecules known as nucleotides?

a nitrogenous base, a phosphate group, and a pentose sugar

a nitrogenous base and a phosphate group

a nitrogenous base and a pentose sugar

a phosphate group and an adenine or uracil

Which of the following statements correctly describes cis-trans isomers?

They have variations in arrangement around a double bond

They have the same chemical properties

They have an asymmetrical carbon that makes them mirror images

They have different molecular formulas

Water is polar because...

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.

The molecule has two poles, at which the it is colder than other regions of the molecule.

The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

A water strider can skate along the top of a pond because:

hydrogen bonds result in water cohesion (surface tension)

covalent bonds result in water cohesion

water striders have adapted to take advantage of water cohesion

Why does water move from the roots to the leaves of plants?

Capillary action pulls the water molecules like a chain

Gravity causes it to “pull” towards the leaves

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

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

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

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

Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that _____.

the concentration of hydrogen ions in solution X is 1000 times as great as the concentration of hydrogen ions in solution Y

solution Y has no free hydrogen ions (H+)

the concentration of hydrogen ions in solution Y is 1000 times as great as the concentration of hydrogen ions in solution X

the concentration of hydrogen ions in solution X is 3 times as great as the concentration of hydrogen ions in solution Y

AP Biology- Water, Carbon, and Macromolecules

Authored by April Baucom

Chemistry, Biology

9th - 12th Grade

NGSS covered

Used 115+ times

AP Biology- Water, Carbon, and Macromolecules

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

Hydrolysis only occurs in the urinary system, and dehydration reactions only occur in the digestive tract.

Hydrolysis creates monomers, and dehydration reactions break down polymers.

Dehydration reactions can occur only after hydrolysis.

Dehydration reactions assemble polymers, and hydrolysis breaks down polymers.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molecule illustrated in the figure below?

a trans polyunsaturated triacylglyceride

a steroid similar to cholesterol

a saturated fatty acid

an unsaturated fatty acid

This is a picture of a?

Amino Acid

Nucleic Acid

Lipid

Polysaccharide

This is a picture of a?

Polypeptide

Nuceotide

Steroid

Polysaccharide

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What are the monomers of carbohydrates?

Nucleotides

Amino Acids

Fatty Acids

Monosaccharides

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What macromolecule makes up the cell membrane's lining?

Saturated Fatty acid chains

Phospholipids

Polypeptide chains

Cellulose polysaccharide Chains

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which term includes all others in the list?

monosaccharide

polysaccharide

starch

carbohydrate

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AP Biology- Water, Carbon, and Macromolecules

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

What is the molecule illustrated in the figure below?

This is a picture of a?

This is a picture of a?

What are the monomers of carbohydrates?

What macromolecule makes up the cell membrane's lining?

Which term includes all others in the list?

Enzymes are examples of:

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