Q: A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$the solution?

$$[H^+] = 1 \times 10$$^{-4}$$ M

Q: Which of the following statements about cellular respiration is correct?

The overall reaction is $$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}.$$

Question 1

Which of the following best explains why water is able to dissolve many ionic and polar substances?

Accepted Answer

Water's polarity allows it to form hydrogen bonds with ions and polar molecules.

Question 2

A scientist is studying a newly discovered organism. Which of the following characteristics would NOT be necessary to classify it as living?

Accepted Answer

Presence of a nucleus

Question 3

Which of the following is the correct order of biological organization from smallest to largest?

Accepted Answer

Organelle, cell, tissue, organ, organism

Question 4

Which of the following statements about the three domains of life is correct?

Accepted Answer

Eukarya includes plants, animals, fungi, and protists.

Question 5

A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$the solution?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$ M

Question 6

Which type of chemical bond is primarily responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 7

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA is usually double-stranded, while RNA is usually single-stranded.

Question 8

Which of the following molecules would most easily cross a pure phospholipid bilayer without the aid of a protein?

Accepted Answer

Oxygen ($$O_2)$$

Question 9

A red blood cell is placed in a solution and swells until it bursts. What can you conclude about the solution?

Accepted Answer

The solution is hypotonic to the cell.

Question 10

Which of the following best explains why enzymes are highly specific for their substrates?

Accepted Answer

The active site of an enzyme has a unique 3D shape that fits only specific substrates.

Question 11

Which of the following statements about cellular respiration is correct?

Accepted Answer

The overall reaction is $$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}.$$

Question 12

During which stage of cellular respiration is the majority of ATP produced?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 13

Which of the following best describes the relationship between wavelength and energy of photons in the visible spectrum?

Accepted Answer

Shorter wavelength photons have higher energy.

Question 14

Which event during meiosis increases genetic variation by exchanging genetic material between homologous chromosomes?

Accepted Answer

Crossing over

Question 15

A woman who is a carrier for a sex-linked recessive disorder (X-linked) has children with a man who does not have the disorder. What is the probability that a son will have the disorder?

Accepted Answer

50%

Question 16

Which enzyme is responsible for unwinding the DNA double helix during DNA replication?

Accepted Answer

Helicase

Question 17

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

DNA is transcribed into RNA, which is translated into protein.

Question 18

A mutation prevents the formation of the baseplate scale in coccolithophores. Which process of coccolithogenesis will be disrupted?

Accepted Answer

Baseplate scale formation

Question 19

Which of the following is a real-world example of an anabolic pathway?

Accepted Answer

Photosynthesis in plant leaves

Question 20

Which of the following best explains why competitive inhibitors decrease the rate of enzyme-catalyzed reactions?

Accepted Answer

They bind to the active site, blocking substrate binding.

BIO201 Final Exam Review: General Biology I Study Guide

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