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

Question 1

Which property of carbon is primarily responsible for the molecular diversity observed in living organisms?

Accepted Answer

Carbon's ability to form four covalent bonds with a variety of atoms

Question 2

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 3

A molecule with the formula $$C_4H_{10}$$ can exist as two different compounds: n-butane and isobutane. What type of isomerism is this?

Accepted Answer

Structural isomerism

Question 4

Which functional group is present in both estradiol and testosterone, contributing to their distinctive properties?

Accepted Answer

Hydroxyl group

Question 5

What is the shape of a molecule where a carbon atom is bonded to four other atoms?

Accepted Answer

Tetrahedral

Question 6

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

Accepted Answer

Calcium (Ca)

Question 7

Hydrocarbons are important in biology because they:

Accepted Answer

Release a large amount of energy when they undergo reactions

Question 8

Which functional group is most likely to act as an acid in biological molecules?

Accepted Answer

Carboxyl group

Question 9

ATP is considered an important molecule in cells because:

Accepted Answer

It stores the potential to react with water, releasing energy for cellular processes

Question 10

Which equation correctly represents the hydrolysis of ATP?

Accepted Answer

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

Question 11

Which of the following best explains why carbon is able to form such a wide variety of molecules?

Accepted Answer

Carbon can form four covalent bonds, allowing for complex structures

Question 12

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

Accepted Answer

Amino group

Question 13

A molecule with a double bond between two carbon atoms will have atoms joined to the carbons:

Accepted Answer

In the same plane as the carbons

Question 14

Which of the following is an example of a real-life application of isomerism in biology?

Accepted Answer

The difference in biological activity between the enantiomers of a drug

Question 15

Which functional group is most likely to be involved in the transfer of energy within cells?

Accepted Answer

Phosphate group

Question 16

Which of the following statements about carbon skeletons is TRUE?

Accepted Answer

Carbon skeletons can vary in length and shape

Question 17

Which chemical group is NOT considered a functional group important in the chemistry of life?

Accepted Answer

Chloride group

Question 18

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

Question 19

Which of the following molecules is an example of a hydrocarbon?

Accepted Answer

Methane ($$CH_4)$$

Question 20

A student is given two samples: one is a hydrocarbon and the other is a molecule with a carboxyl group. Which test could distinguish between them?

Accepted Answer

Test for acidity; the molecule with a carboxyl group will act as an acid

Carbon and the Molecular Diversity of Life: Study Notes

Study Guide - Practice Questions