Question 1

Which of the following statements best explains why carbon is considered the backbone of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds, allowing it to create diverse and stable structures such as chains and rings.

Question 2

Which of the following elements is NOT considered a major element found in all living organisms?

Accepted Answer

Calcium

Question 3

A hydrocarbon molecule with the formula $$C_5H_{12} is $$most likely which of the following?

Accepted Answer

Pentane

Question 4

Which of the following best describes a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different covalent arrangements of their atoms.

Question 5

Which functional group is present in all alcohols and is responsible for their characteristic properties?

Accepted Answer

Hydroxyl group ($$-OH)$$

Question 6

A molecule with the formula $$C_6H_{12}O_6$ can exist as glucose or fructose. These two molecules are examples of which type of isomer?

Accepted Answer

Structural isomers

Question 7

Which of the following best explains why ATP is considered the 'energy currency' of the cell?

Accepted Answer

ATP contains high-energy phosphate bonds that, when hydrolyzed, release energy for cellular processes.

Question 8

Which of the following functional groups is found in both aldehydes and ketones?

Accepted Answer

Carbonyl group ($$\u003eC=O)$$

Question 9

Which of the following best describes the difference between cis-trans isomers?

Accepted Answer

They have the same covalent bonds but differ in spatial arrangements due to inflexibility of double bonds.

Question 10

A molecule contains a methyl group ($$-CH_3$) attached to its carbon skeleton. Which of the following is a property imparted by this group?

Accepted Answer

It makes the molecule more hydrophobic.

Question 11

Which of the following is NOT one of the seven most common functional groups found in organic molecules?

Accepted Answer

Nitro group ($$-NO_2$)

Question 12

Which of the following best explains why structure determines function in organic molecules?

Accepted Answer

The specific arrangement of atoms and functional groups in a molecule determines its chemical properties and interactions.

Question 13

Which of the following best describes an enantiomer?

Accepted Answer

Molecules that are mirror images of each other and cannot be superimposed.

Question 14

A patient is given a drug that is a mixture of two enantiomers. Only one enantiomer is effective, while the other causes side effects. What property of enantiomers explains this difference?

Accepted Answer

Enantiomers have different three-dimensional shapes, which can interact differently with biological molecules such as enzymes.

Question 15

Which of the following correctly matches a functional group with its structure?

Accepted Answer

Amino group: $$-NH_2$

Question 16

Which of the following best describes the structure of ATP?

Accepted Answer

A nucleotide with an adenine base, a ribose sugar, and three phosphate groups.

Question 17

If a hydrocarbon chain contains only single bonds between carbon atoms, it is classified as:

Accepted Answer

Saturated

Question 18

Which of the following functional groups is most likely to act as a base by accepting a proton ($$H^+$$)?

Accepted Answer

Amino group ($$-NH_2$)

Question 19

A molecule with a carboxyl group ($$-COOH) is $$most likely to behave as:

Accepted Answer

An acid, donating a proton ($$H^+) in $$solution.

Question 20

Which of the following best explains why hydrocarbons are generally insoluble in water?

Accepted Answer

Hydrocarbons are nonpolar and cannot form hydrogen bonds with water molecules.

Chapter 4: Carbon and the Molecular Diversity of Life - Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드