Q: Which of the following is a correct representation of the reaction that releases energy from ATP?

$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy} $$

Question 1

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

Accepted Answer

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

Question 2

Stanley Miller’s classic experiment simulated early Earth conditions to test the abiotic synthesis of organic molecules. Which of the following best describes the significance of his findings?

Accepted Answer

It demonstrated that organic molecules could form under prebiotic Earth conditions

Question 3

Which of the following best explains why carbon atoms can form large, complex molecules?

Accepted Answer

Carbon atoms can form up to four covalent bonds, allowing for branching and ring structures

Question 4

Which of the following is a correct representation of the reaction that releases energy from ATP?

Accepted Answer

$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy} $$

Question 5

Which of the following statements about isomers is correct?

Accepted Answer

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

Question 6

A pharmaceutical company discovers that only one enantiomer of a drug is effective in treating a disease. What is the most likely explanation for this observation?

Accepted Answer

Organisms are sensitive to subtle differences in molecular structure, so only one enantiomer fits the target site

Question 7

Which functional group is present in all amino acids and acts as a base by accepting H$$^+$$ ions?

Accepted Answer

Amino group

Question 8

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen atoms

Question 9

Which of the following is NOT a way that carbon skeletons can vary to create molecular diversity?

Accepted Answer

Type of element bonded to the central atom in water

Question 10

Which of the following molecules is an example of a structural isomer?

Accepted Answer

Butane and 2-methylpropane (isobutane)

Question 11

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

Accepted Answer

Carboxyl group

Question 12

Why do fats contain so much energy compared to carbohydrates?

Accepted Answer

Fats are composed of hydrocarbons, which release more energy when oxidized

Question 13

Which of the following best explains why ATP is considered an important molecule for cellular processes?

Accepted Answer

ATP stores potential energy in its phosphate bonds, which can be released to do cellular work

Question 14

Which of the following statements about the molecular structure of methane ($$ \mathrm{CH}_4 ) is $$correct?

Accepted Answer

Methane has a tetrahedral geometry

Question 15

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

Accepted Answer

They have the same carbon skeleton but differ in the chemical groups attached

Question 16

A molecule with the formula $$ \mathrm{C}_2\mathrm{H}_4  is $$best described as:

Accepted Answer

An unsaturated hydrocarbon with a double bond

Question 17

Which of the following functional groups is NOT polar and does NOT increase the solubility of organic molecules in water?

Accepted Answer

Methyl group

Question 18

Which of the following best explains why only one enantiomer of a drug may be effective in humans?

Accepted Answer

Biological receptors are stereospecific and only bind one enantiomer

Question 19

Which of the following is a correct statement about the valence of carbon?

Accepted Answer

Carbon can form up to 4 covalent bonds

Question 20

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

Accepted Answer

Chloride group

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

Study Guide - Practice Questions

Study Guide - Flashcards