Question 1

Which property of carbon allows it to form a vast diversity of organic molecules?

Accepted Answer

Its ability to form four covalent bonds with a variety of atoms

Question 2

Stanley Miller’s experiment demonstrated the abiotic synthesis of organic compounds. Which real-world implication does this experiment support?

Accepted Answer

Abiotic synthesis of organic compounds could have been a stage in the origin of life

Question 3

Which functional group behaves as a base in organic molecules?

Accepted Answer

Amino

Question 4

What type of chemical bond joins a functional group to the carbon skeleton of a large molecule?

Accepted Answer

Covalent bond

Question 5

Which of the following best describes a structural isomer?

Accepted Answer

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

Question 6

Refer to the image showing cis-trans isomers. Which statement correctly describes a trans isomer?

Accepted Answer

The two Xs are on opposite sides of the double bond

Question 7

Enantiomers are important in the pharmaceutical industry because:

Accepted Answer

Often only one enantiomer is biologically active

Question 8

Which functional group is present in the molecule shown in the sixth image (with the formula HO-C=O, NH2, and OH groups)?

Accepted Answer

Carboxyl

Question 9

The molar ratio of serine to glycine in Stanley Miller’s experiment is $$3.0 	imes 10$$^{-2}$$ moles of serine per mole of glycine. What does this ratio indicate about the abundance of serine compared to glycine?

Accepted Answer

Serine is much less abundant than glycine

Question 10

Which of the following is NOT a way that carbon skeletons can vary, as shown in the first image?

Accepted Answer

Number of hydrogen atoms

Question 11

Hydrocarbons are important in biological systems because:

Accepted Answer

They can undergo reactions that release a large amount of energy

Question 12

Which functional group is responsible for the acidic properties of organic acids?

Accepted Answer

Carboxyl group

Question 13

Estradiol and testosterone are both steroids with a common carbon skeleton. What makes them functionally different?

Accepted Answer

The chemical groups attached to the rings of the carbon skeleton

Question 14

Which functional group is found in ATP and is key to its role in energy transfer?

Accepted Answer

Phosphate group

Question 15

A molecule with the formula $$C_3H_8 is an $$example of which type of organic molecule?

Accepted Answer

Hydrocarbon

Question 16

Which of the following statements about carbon’s electron configuration is correct?

Accepted Answer

It allows carbon to form four covalent bonds with a variety of atoms

Question 17

Which functional group is most likely to be found in a molecule that acts as a base in biological systems?

Accepted Answer

Amino group

Question 18

Which of the following best explains why organisms are sensitive to even subtle variations in molecules such as enantiomers?

Accepted Answer

Enantiomers can have drastically different biological effects

Question 19

Which of the following is a correct statement about the molecular diversity of life?

Accepted Answer

It is due to the versatility of carbon in forming a variety of molecules

Question 20

Which of the following is NOT a functional group commonly found in the chemistry of life?

Accepted Answer

Ethyl group

Chapter 4: Carbon and the Molecular Diversity of Life: Structure, Function, and Biological Relevance

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