Question 1

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by the attraction between oppositely charged ions after the transfer of electrons.

Question 2

Which of the following is true about the atomic number of an element?

Accepted Answer

It is equal to the number of protons in the nucleus.

Question 3

A sodium atom (Na) loses one electron to become Na⁺. What type of ion is Na⁺?

Accepted Answer

A cation

Question 4

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom.

Question 5

Which reaction is represented by the following equation? 
$$C_6H_{12}O_6$ + C_6H_{12}O_6$ \rightarrow C$$_{12}$$H_{22}O$$_{11} + H_2O$

Accepted Answer

Dehydration synthesis

Question 6

Which of the following is a property of phospholipids that is critical for cell membrane structure?

Accepted Answer

They have both hydrophilic heads and hydrophobic tails.

Question 7

Which of the following functional groups is found in all amino acids?

Accepted Answer

Carboxyl group

Question 8

What is the main difference between DNA and RNA nucleotides?

Accepted Answer

DNA contains deoxyribose, RNA contains ribose.

Question 9

Which of the following best describes a redox reaction?

Accepted Answer

A reaction where electrons are transferred, resulting in oxidation and reduction.

Question 10

Which of the following statements about proteins is correct?

Accepted Answer

Proteins are polymers of amino acids linked by peptide bonds.

Question 11

Which of the following is an example of an exchange (displacement) reaction?

Accepted Answer

ATP + Glucose $$\rightarrow$$ ADP + Glucose-phosphate

Question 12

Which of the following best explains why saturated fats are solid at room temperature while unsaturated fats are liquid?

Accepted Answer

Saturated fats have no double bonds, allowing tight packing; unsaturated fats have double bonds causing kinks.

Question 13

Which of the following is a correct pairing of a functional group and its biological importance?

Accepted Answer

Carboxyl group – Organic acids and proteins

Question 14

Which of the following best describes the tertiary structure of a protein?

Accepted Answer

The overall three-dimensional shape formed by folding and interactions among secondary structures.

Question 15

Which of the following is a property of water that makes it essential for life?

Accepted Answer

It forms hydrogen bonds, allowing it to dissolve many substances.

Question 16

Which of the following statements about macromolecules is correct?

Accepted Answer

Proteins are polymers of amino acids.

Question 17

Which of the following is an isomer?

Accepted Answer

Two molecules with the same chemical formula but different structures.

Question 18

Which of the following best describes the role of ATP in the cell?

Accepted Answer

ATP stores and releases energy for cellular processes.

Question 19

Which of the following statements about dehydration synthesis is correct?

Accepted Answer

It involves the removal of water to form bonds between monomers.

Chemical Principles in Microbiology: Atoms, Bonds, and Biological Molecules

Study Guide - Practice Questions