Q: Which of the following reactions involving ATP releases energy for cellular processes?

$$ATP + H_2O \rightarrow ADP + P_i + \text{energy}$$

Question 1

Which property of carbon most directly explains its ability to form large, complex, and diverse molecules essential for life?

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Stanley Miller's classic experiment demonstrated which of the following concepts about the origin of life?

Accepted Answer

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

Question 3

What is the molecular geometry around each carbon atom in methane ($$CH_4$$)?

Accepted Answer

Tetrahedral

Question 4

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 5

Which functional group is correctly matched with its chemical formula?

Accepted Answer

Amino group: $$-NH_2$

Question 6

Which of the following statements about ATP (adenosine triphosphate) is correct?

Accepted Answer

ATP stores energy that is released when it reacts with water

Question 7

If a carbon atom forms a double bond with another carbon atom, what is the resulting geometry around each carbon?

Accepted Answer

Trigonal planar

Question 8

Which of the following best explains why estradiol and testosterone have different effects in the body?

Accepted Answer

They have different functional groups attached to the same carbon skeleton

Question 9

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

Accepted Answer

Nitro group

Question 10

A fat molecule contains long hydrocarbon chains. What property do these chains impart to fats?

Accepted Answer

They make fats a good source of stored energy

Question 11

Which of the following best describes the relationship between the number of unpaired electrons in the valence shell and the number of covalent bonds an atom can form?

Accepted Answer

The number of unpaired electrons is generally equal to the number of covalent bonds

Question 12

Which of the following reactions involving ATP releases energy for cellular processes?

Accepted Answer

$$ATP + H_2O ightarrow ADP + P_i + 	ext{energy}$$

Question 13

Which of the following is a correct statement about the diversity of carbon skeletons?

Accepted Answer

Carbon skeletons can vary in length, branching, and presence of rings

Question 14

Which of the following best describes the oxidation state of carbon in $$CO_2$$ compared to $$CH_4$$?

Accepted Answer

Carbon is oxidized in $$CO_2$$ and reduced in $$CH_4$$

Question 15

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

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 16

A molecule with the formula $$C_2H_6 is $$best described as which of the following?

Accepted Answer

Ethane

Question 17

Which of the following is a real-world application of the importance of functional groups in biology?

Accepted Answer

The difference in function between estradiol and testosterone is due to different functional groups

Question 18

Which of the following best explains why hydrocarbons are a good source of energy?

Accepted Answer

They have long chains of carbon-hydrogen bonds that release energy when broken

Question 19

Which of the following is NOT a property of carbon that contributes to its molecular diversity?

Accepted Answer

Ability to form ionic bonds with hydrogen

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

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