[h] Chapter 3 

[q json=”true” unit=”Unit1″ topic=”Chapter3″ question_number=”34″] What is the valence of carbon?

[a] 4

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8465b5d1b5fa” question_number=”2″] What elements do carbon atoms typically bond with to form organic compounds?

[a] Oxygen, hydrogen, and nitrogen

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8455697e79fa” question_number=”3″] What are hydrocarbons?

[a] Organic compounds composed solely of carbon and hydrogen.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8442c91f59fa” question_number=”4″] What are functional groups?

[a] Chemical groups attached to carbon skeletons that participate in chemical reactions or contribute to molecular function.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c843028c039fa” question_number=”5″] In what ways does a methyl group differ chemically from the other six important chemical groups?

A) It contains a double bond.

B) It is polar.

C) It is nonpolar.

D) It contains a nitrogen atom.

E) It contains an oxygen atom

[a] C) It is nonpolar.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c840893f615fa” question_number=”6″] Which of the following is a functional group?

A) Hydroxyl group

B) Carbonyl group

C) Amino group

D) Phosphate group

E) Methyl group

F) All of the above

[a] F) Methyl group

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83f847a2d9fa” question_number=”7″] Which functional group is involved in the formation of peptide bonds in proteins?

A) Hydroxyl group

B) Carbonyl group

C) Amino group

D) Phosphate group

E) Methyl group

Answer:

[a] C) Amino group

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83e5a743b9fa” question_number=”8″] ATP is a molecule that stores and releases energy. Which functional group is essential for this function?

A) Hydroxyl group

B) Carbonyl group

C) Amino group

D) Phosphate group

E) Methyl group

Answer:

[a] D) Phosphate group

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83d306e499fa” question_number=”9″] What are polymers?

[a] Large molecules composed of repeating subunits called monomers.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83c2ba915dfa” question_number=”10″] What is a dehydration reaction?

[a] A chemical reaction that joins two molecules together by removing a water molecule.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83a6ca02adfa” question_number=”11″] What is hydrolysis?

[a] A chemical reaction that breaks down a molecule by adding a water molecule.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c839429a38dfa” question_number=”12″] Which type of macromolecule is composed of amino acids?

A) Carbohydrates

B) Lipids

C) Proteins

D) Nucleic acids

[a] C) Proteins

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c83713cf131fa” question_number=”13″] Which type of macromolecule is composed of nucleotides?

A) Carbohydrates

B) Lipids

C) Proteins

D) Nucleic acids

[a] D) Nucleic acids

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8360f09df5fa” question_number=”14″] Which type of macromolecule is primarily used for energy storage?

A) Carbohydrates

B) Lipids

C) Proteins

D) Nucleic acids

[a] A) Carbohydrates

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8350a44ab9fa” question_number=”15″] Which type of macromolecule is involved in cell structure and function?

A) Carbohydrates

B) Lipids

C) Proteins

D) Nucleic acids

[a] C) Proteins

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c834057f77dfa” question_number=”16″] Which type of macromolecule is involved in genetic information storage and transmission?

A) Carbohydrates

B) Lipids

C) Proteins

D) Nucleic acids

[a] D) Nucleic acids

 

[a] CH4

Compounds containing carbon are said to be organic.

 

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82ff26aa8dfa” question_number=”20″] Which of the following are properties of hydrocarbons?

a. hydrophilic, good source of stored energy, consisting primarily of carbon and hydrogen
b. hydrophobic, containing numerous amine groups, polar
c. hydrophobic, polar, charged
d. hydrophilic, containing numerous carboxyl groups, nonpolar
e. hydrophobic, nonpolar, good source of stored energy

[a] hydrophobic, nonpolar, good source of stored energy

Because they are nonpolar, hydrocarbons are hydrophobic. They also provide energy in the forms of things such as fossil fuels and fats.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82eeda5751fa” question_number=”21″] What is the role of enzymes in the polymerization and depolymerization of macromolecules?

[a] Enzymes catalyze these reactions, speeding them up and making them more efficient.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82de8e0415fa” question_number=”22″] How do carbohydrates function as energy storage molecules?

[a] Carbohydrates can be broken down into simple sugars, which can then be used by cells for energy production through cellular respiration.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82ce41b0d9fa” question_number=”23″] What is the primary function of proteins in living organisms?

[a] Proteins have diverse functions, including enzymes, structural components, transport, and signaling.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82bdf55d9dfa” question_number=”24″] Which type of macromolecule is composed of fatty acids and glycerol?

A) Carbohydrates

B) Proteins

C) Lipids

D) Nucleic acids

[a] C) Lipids

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82affd1645fa” question_number=”25″] What is the difference between DNA and RNA in terms of their sugar components?

A) DNA contains deoxyribose, while RNA contains ribose.

B) DNA contains ribose, while RNA contains deoxyribose.

C) Both DNA and RNA contain deoxyribose.

D) Both DNA and RNA contain ribose.

[a] A) DNA contains deoxyribose, while RNA contains ribose.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c829fb0c309fa” question_number=”26″] What is the primary function of nucleic acids?

A) Energy storage

B) Structural support

C) Genetic information storage and transmission

D) Catalysis

[a] C) Genetic information storage and transmission

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c828f646fcdfa” question_number=”27″] What is the relationship between the primary, secondary, tertiary, and quaternary structures of a protein?

[a] The primary structure is the linear sequence of amino acids.

The secondary structure involves local folding patterns (e.g., alpha-helices, beta-sheets).

The tertiary structure is the overall 3D shape of the protein, determined by interactions between amino acid side chains.

The quaternary structure is the arrangement of multiple polypeptide chains in a protein complex.  

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c827f181c91fa” question_number=”28″] How do changes in pH and temperature affect protein structure and function?

[a] Proteins are sensitive to changes in pH and temperature. Extreme conditions can disrupt the protein’s structure, leading to denaturation and loss of function.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c826c77bd71fa” question_number=”29″] How do lipids contribute to the structure and function of cell membranes?

[a] Lipids, primarily phospholipids, form the phospholipid bilayer, which is the main structural component of cell membranes. This bilayer creates a barrier between the inside and outside of the cell.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c825c2b6a35fa” question_number=”30″] What is the difference between saturated and unsaturated fatty acids?

[a] Saturated fatty acids have no double bonds between carbon atoms, while unsaturated fatty acids have one or more double bonds.

Unsaturated fatty acids can be further classified as monounsaturated or polyunsaturated based on the number of double bonds.  

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c82498b0b15fa” question_number=”31″] How do changes in fatty acid composition affect the fluidity of cell membranes?

[a] Unsaturated fatty acids with double bonds introduce kinks in the fatty acid chains, making the membrane more fluid.

Saturated fatty acids, with no double bonds, pack more tightly together, making the membrane less fluid.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8236eaabf5fa” question_number=”32″] What is the role of cholesterol in cell membranes?

[a] Cholesterol helps to maintain the fluidity and stability of cell membranes. It can modulate the fluidity by intercalating between phospholipid molecules.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c8221f640f1fa” question_number=”33″] What are the different types of carbohydrates and their functions?

[a] Carbohydrates can be classified as monosaccharides (simple sugars), disaccharides (two sugars joined together), and polysaccharides (many sugars joined together).

They serve as energy sources, structural components, and cell recognition molecules.

[q json=”true” unit=”Unit1″ topic=”Chapter3″ dataset_id=”Unit1-Chapter3|1c81e0c4f401fa” question_number=”34″] What is the role of glycogen in energy storage?

[a] Glycogen is a polysaccharide stored primarily in the liver and muscles. It serves as a reserve of glucose and can be broken down to provide energy when needed.

[q unit=”Unit1″ topic=”Chapter3″]What holds 2 monosaccharides together?

 

 

[q unit=”Unit1″ topic=”Chapter3″] What is animal starch called?

C. Amylose

D. Glycogen

[q unit=”Unit1″ topic=”Chapter3″] What links fatty acids with glycerol?

A. Phosphodiester linkage

B. Peptide bond

 

[q unit=”Unit1″ topic=”Chapter3″] What is a monoglyceride?