Question 1

Which property of carbon allows it to form a diverse array of molecules essential for life?

Accepted Answer

Its ability to form covalent bonds with up to four other atoms

Question 2

Which statement best explains why hydrocarbons are hydrophobic?

Accepted Answer

Hydrocarbons are composed of nonpolar covalent bonds, which do not interact favorably with water

Question 3

Which of the following best describes the difference between monomers and polymers?

Accepted Answer

Monomers are small, repeating units that join together to form polymers

Question 4

Which process is represented by the following equation: $$ 	ext{C}_6	ext{H}_{12}	ext{O}_6 + 	ext{C}_6	ext{H}_{12}	ext{O}_6 ightarrow 	ext{C}_{12}	ext{H}_{22}	ext{O}_{11} + 	ext{H}_2	ext{O} $$ ?

Accepted Answer

Dehydration synthesis

Question 5

Which of the following is a function of polysaccharides in living organisms?

Accepted Answer

They serve as structural components and energy storage molecules

Question 6

Which statement correctly describes the difference between saturated and unsaturated fats?

Accepted Answer

Unsaturated fats contain one or more double bonds between carbon atoms, causing kinks in the fatty acid chain

Question 7

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Storing genetic information

Question 8

A protein's primary structure is determined by:

Accepted Answer

The sequence of amino acids in the polypeptide chain

Question 9

Which type of bond is primarily responsible for maintaining the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 10

Which of the following conditions is most likely to cause protein denaturation?

Accepted Answer

High temperature and extreme pH

Question 11

Which of the following correctly matches a nucleic acid monomer with its components?

Accepted Answer

Nucleotide: phosphate group, pentose sugar, nitrogenous base

Question 12

Which of the following is a purine base found in nucleic acids?

Accepted Answer

Adenine

Question 13

Which end of a nucleotide is attached to the phosphate group in a nucleic acid polymer?

Accepted Answer

5' end

Question 14

Which of the following best explains why ATP is considered a high-energy molecule?

Accepted Answer

ATP contains three phosphate groups linked by unstable bonds that release energy when hydrolyzed

Question 15

Which of the following best describes the role of phospholipids in biological membranes?

Accepted Answer

They form a bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward

Question 16

Which of the following is a correct example of a dehydration reaction in biological systems?

Accepted Answer

Joining two amino acids to form a dipeptide and releasing water

Question 17

Which of the following statements about protein tertiary structure is correct?

Accepted Answer

It is determined by interactions among R groups, including hydrophobic interactions, ionic bonds, and disulfide bridges

Question 18

Which of the following best describes the function of ribose in nucleic acids?

Accepted Answer

It is the pentose sugar in RNA

Question 19

Which of the following is a correct statement about the structure of a triglyceride?

Accepted Answer

It consists of three fatty acids joined to a glycerol molecule by ester bonds

Question 20

Which of the following best explains the importance of hydrogen bonds in the structure of DNA?

Accepted Answer

Hydrogen bonds connect complementary nitrogenous bases, stabilizing the double helix

General Biology: Biomolecules and Their Functions

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