Question 1

Which of the following best describes the process shown in the first image, where sodium and chlorine atoms interact?

Accepted Answer

Formation of an ionic bond through electron transfer

Question 2

When sodium chloride (NaCl) dissolves in water, as shown in the second image, what happens to the ions?

Accepted Answer

Na+ and Cl- ions become surrounded by water molecules, forming electrolytes

Question 3

The third image shows a dotted line between ammonia (NH3) and water (H2O). What type of interaction is represented by this dotted line?

Accepted Answer

Hydrogen bond

Question 4

In the hydrolysis reaction shown in the fourth image, what is the role of water?

Accepted Answer

Water is added to break a covalent bond, releasing an amino acid

Question 5

Refer to the fifth image showing an energy diagram. What does the peak of the curve represent?

Accepted Answer

The activation energy required to start the reaction

Question 6

Based on the sixth image, which component of ATP is responsible for its high-energy storage capability?

Accepted Answer

The three phosphate groups

Question 7

The seventh image illustrates the ATP cycle. Which process releases energy for cellular work?

Accepted Answer

Dephosphorylation of ATP

Question 8

In the eighth image, what is the effect of an enzyme on the activation energy of a reaction?

Accepted Answer

Enzymes decrease the activation energy required

Question 9

The ninth image shows an enzyme binding to a substrate. What is the name of the region where the substrate binds?

Accepted Answer

Active site

Question 10

According to the tenth image, what is the role of a cofactor in enzyme activity?

Accepted Answer

Cofactors are required for the enzyme to produce products

Question 11

The eleventh image demonstrates competitive inhibition. How can enzyme activity be restored in the presence of a competitive inhibitor?

Accepted Answer

By increasing the concentration of substrate

Question 12

In the twelfth image, what is the effect of a noncompetitive inhibitor on enzyme activity?

Accepted Answer

It binds elsewhere on the enzyme and prevents product formation

Question 13

The thirteenth image shows allosteric regulation. What happens when an allosteric inhibitor binds to an enzyme?

Accepted Answer

Enzyme activity decreases

Question 14

Refer to the fourteenth image. What is the mechanism of feedback inhibition in metabolic pathways?

Accepted Answer

The final product binds to a regulatory site, inhibiting the first enzyme

Question 15

Based on the fifteenth image, where does glycolysis occur in prokaryotic and eukaryotic cells?

Accepted Answer

In the cytoplasm of both cell types

Question 16

The sixteenth image shows the electron transport chain. What is the main function of this chain?

Accepted Answer

To pump protons across the membrane, creating a proton gradient

Question 17

In the seventeenth image, what is the role of ATP synthase?

Accepted Answer

To use the energy from flowing protons to synthesize ATP from ADP and Pi

Question 18

The eighteenth image shows two fermentation pathways. In lactic acid fermentation, what is the final electron acceptor?

Accepted Answer

Pyruvate

Question 19

In alcoholic fermentation, as shown in the nineteenth image, which molecule accepts electrons from NADH?

Accepted Answer

Acetaldehyde

Question 20

Which of the following equations correctly represents the reduction of NAD+ during cellular respiration?

Accepted Answer

$$\mathrm{NAD^+ + 2H^+ + 2e^- \rightarrow NADH + H^+}$$

Biochemistry Basics and Microbial Metabolism: Structured Study Notes 2/8

Study Guide - Practice Questions