Question 1

Which of the following statements best describes a major difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus containing linear chromosomes, while prokaryotic cells have a nucleoid region with a circular chromosome.

Question 2

Which organelle is responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 3

Which of the following best explains why enzymes are necessary for life?

Accepted Answer

Enzymes lower the activation energy, allowing reactions to occur rapidly at body temperature.

Question 4

Which of the following is true regarding the laws of thermodynamics as they apply to biological systems?

Accepted Answer

Matter and energy are both conserved, but their forms can change during metabolism.

Question 5

Which equation correctly represents the change in free energy for a chemical reaction?

Accepted Answer

$$\Delta G = G_{products} - G_{reactants}$$

Question 6

A reaction with $$\Delta G \u003c 0 is $$best described as:

Accepted Answer

Exergonic and spontaneous

Question 7

Which of the following best describes the process of energy coupling in cells?

Accepted Answer

Energy coupling uses the energy released from an exergonic reaction, such as ATP hydrolysis, to drive an endergonic reaction.

Question 8

Which of the following is a correct statement about enzyme regulation?

Accepted Answer

Allosteric inhibitors bind to a site other than the active site, causing a conformational change that reduces enzyme activity.

Question 9

Which of the following best describes the role of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They are electron carriers that transfer high-energy electrons to the electron transport chain.

Question 10

Which of the following is a product of the light-dependent reactions of photosynthesis?

Accepted Answer

ATP

Question 11

What is the main function of the Calvin cycle in photosynthesis?

Accepted Answer

To fix carbon dioxide into organic molecules using ATP and NADPH

Question 12

Which of the following best describes photorespiration?

Accepted Answer

A process where RuBisCO fixes oxygen instead of carbon dioxide, reducing the efficiency of photosynthesis.

Question 13

During glycolysis, what are the main products generated from one molecule of glucose?

Accepted Answer

Pyruvate, NADH, and ATP

Question 14

Which of the following best explains why fermentation is important for cells under anaerobic conditions?

Accepted Answer

Fermentation allows glycolysis to continue by regenerating NAD$$^+$$ from NADH.

Question 15

Which of the following is a correct pairing of organelle and function?

Accepted Answer

Golgi apparatus – Protein, lipid, and carbohydrate processing

Question 16

Which of the following best describes the fate of electrons during the complete oxidation of glucose in cellular respiration?

Accepted Answer

Electrons are transferred from glucose to oxygen, forming water.

Question 17

Which of the following is true about the relationship between photosynthesis and cellular respiration?

Accepted Answer

The outputs of photosynthesis are the inputs of cellular respiration and vice versa.

Question 18

Which of the following best describes the role of ATP in cellular metabolism?

Accepted Answer

ATP provides energy for cellular work by transferring a phosphate group to other molecules.

Question 19

Which of the following statements about entropy is correct?

Accepted Answer

Entropy increases as complex molecules are broken down into simpler ones.

Cells, Metabolism, Enzymes, Photosynthesis, and Cellular Respiration: Introductory Biology Study Notes

Study Guide - Practice Questions