Question 1

Which property of carbon most directly contributes to the diversity of organic molecules found in living organisms?

Accepted Answer

Carbon can form up to four covalent bonds with a variety of atoms.

Question 2

Which of the following best explains why hydrocarbons are a major component of fats and are used for energy storage in living organisms?

Accepted Answer

Hydrocarbons can undergo reactions that release a large amount of energy.

Question 3

Which of the following statements about isomers is correct?

Accepted Answer

Enantiomers are mirror images of each other and can have different biological activities.

Question 4

A molecule with the formula $$C_6H_{12}O_6$ can exist as glucose or fructose. What type of isomers are these?

Accepted Answer

Structural isomers

Question 5

Which functional group is most likely to act as an acid by donating a hydrogen ion ($$H^+) to $$solution?

Accepted Answer

Carboxyl group

Question 6

ATP is considered an important molecule in cellular processes because:

Accepted Answer

It stores energy in the bonds between its phosphate groups, which can be released by hydrolysis.

Question 7

Which of the following best describes the difference between estradiol and testosterone?

Accepted Answer

They differ only in the functional groups attached to their common carbon skeleton.

Question 8

Which of the following functional groups is present in all amino acids and can act as a base?

Accepted Answer

Amino group

Question 9

A molecule contains a sulfhydryl group. Which of the following is a likely property of this molecule?

Accepted Answer

It can form disulfide bonds, contributing to protein structure.

Question 10

Which of the following statements about carbon skeletons is FALSE?

Accepted Answer

All carbon skeletons are linear and unbranched.

Question 11

Which of the following best explains why enantiomers can have very different effects in biological systems?

Accepted Answer

Enantiomers are mirror images and may interact differently with other chiral molecules, such as enzymes.

Question 12

Which of the following is a correct representation of the hydrolysis of ATP to ADP?

Accepted Answer

$$ATP + H_2O \rightarrow ADP + P_i + energy$$

Question 13

Which functional group is most likely to be found in a molecule that can transfer energy between organic molecules in cells?

Accepted Answer

Phosphate group

Question 14

A molecule with the formula $$C_5H_{10}O_2$ is found to have two different forms that differ only in the arrangement of atoms around a double bond. What type of isomers are these?

Accepted Answer

Cis-trans isomers

Question 15

Which of the following best describes the role of functional groups in organic molecules?

Accepted Answer

They are the components most commonly involved in chemical reactions and give molecules their unique properties.

Question 16

Which of the following molecules contains a carbonyl group?

Accepted Answer

Urea

Question 17

Which of the following is a real-world example of the importance of isomers in medicine?

Accepted Answer

One enantiomer of a drug may be therapeutic, while the other may be harmful.

Question 18

Which of the following best explains why carbon dioxide ($$CO_2) is $$not considered an organic molecule, even though it contains carbon?

Accepted Answer

It does not contain hydrogen atoms bonded to carbon.

Question 19

Which of the following statements about the valence of carbon is correct?

Accepted Answer

Carbon has four unpaired electrons in its valence shell, allowing it to form four covalent bonds.

Question 20

Which of the following best describes the shape of a molecule where a carbon atom is bonded to four other atoms?

Accepted Answer

Tetrahedral

Carbon and the Molecular Diversity of Life: Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드