Question 1

Which subatomic particle determines the identity of an element and is found in the nucleus of an atom?

Accepted Answer

Proton

Question 2

A neutral atom of sodium ($$Na) $$has 11 protons. If it loses one electron, what is the resulting charge of the ion?

Accepted Answer

$$+1$$

Question 3

Which of the following best describes the difference between isotopes of the same element?

Accepted Answer

They have different numbers of neutrons.

Question 4

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 5

What is the main reason atoms form chemical bonds?

Accepted Answer

To fill their outer electron shell and become more stable

Question 6

Which of the following is a real-world application of radioisotopes in medicine?

Accepted Answer

Tracking disease progression with PET scans

Question 7

Which of the following bonds is responsible for the unique properties of water, such as its high boiling point and surface tension?

Accepted Answer

Hydrogen bonds

Question 8

A molecule of glucose ($$C_6H_{12}O_6$) is classified as which type of biomolecule?

Accepted Answer

Carbohydrate

Question 9

Which of the following statements about saturated and unsaturated fatty acids is correct?

Accepted Answer

Saturated fatty acids have no double bonds and are typically solid at room temperature.

Question 10

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Storing genetic information

Question 11

Which type of bond is primarily responsible for holding together the two strands of DNA?

Accepted Answer

Hydrogen bonds

Question 12

Which of the following best describes the structure of a nucleotide?

Accepted Answer

A phosphate group, a sugar, and a nitrogenous base

Question 13

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

They have a sea of delocalized electrons due to metallic bonding.

Question 14

Which of the following is a polymer formed by joining amino acids together?

Accepted Answer

Polypeptide

Question 15

Which of the following best describes the role of cholesterol in the human body?

Accepted Answer

It is important for hormone production and cell membrane structure.

Question 16

Which of the following statements about dehydration synthesis is correct?

Accepted Answer

It joins monomers to form polymers by removing water.

Question 17

Which of the following is a function of nucleic acids in living organisms?

Accepted Answer

Storing and transmitting genetic information

Question 18

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, creating partial charges.

Question 19

Which of the following is a real-life example of the importance of understanding chemical bonds in drug design?

Accepted Answer

Ensuring a drug fits precisely into a protein's active site

Question 20

Which of the following best explains why water is an excellent solvent for many biological molecules?

Accepted Answer

Water's polarity allows it to interact with and dissolve many polar and ionic substances.

The Chemistry of Microbiology: Atoms, Bonds, and Biomolecules

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