Question 1

Which of the following best describes the difference between the orbital model and the planetary model of atomic structure?

Accepted Answer

The orbital model represents electrons as a cloud of negative charge, while the planetary model shows electrons as small spheres in fixed orbits around the nucleus.

Question 2

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons and electrons, but different numbers of neutrons.

Question 3

Which of the following mixtures is best described as a heterogeneous mixture in which solute particles are large enough to settle out over time?

Accepted Answer

Suspension

Question 4

Which of the following is a correct example of a colloid found in the human body?

Accepted Answer

Cytosol

Question 5

Which of the following elements is chemically inert due to a complete valence shell?

Accepted Answer

Neon (Ne)

Question 6

Which of the following best explains why sodium (Na) is chemically reactive?

Accepted Answer

It has only one electron in its outermost shell, making it likely to lose that electron to achieve stability.

Question 7

Which of the following best describes the bonding in a water (H$$_2O) $$molecule?

Accepted Answer

Polar covalent bonds with unequal sharing of electrons

Question 8

Which of the following is a true statement about hydrogen bonds?

Accepted Answer

They are responsible for the high surface tension of water.

Question 9

Which of the following reactions is an example of a synthesis reaction?

Accepted Answer

Amino acids joining together to form a protein

Question 10

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

Monomers are joined together by the removal of a water molecule.

Question 11

Which of the following is a correct pairing of a carbohydrate class and its example?

Accepted Answer

Disaccharide – Maltose

Question 12

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

Accepted Answer

Saturated fats have only single bonds between carbon atoms and are solid at room temperature.

Question 13

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

Accepted Answer

Two fatty acids, a glycerol, and a phosphate-containing group

Question 14

Which of the following is a function of cholesterol in the body?

Accepted Answer

It is a starting material for synthesis of vitamin D, steroid hormones, and bile salts.

Question 15

Which of the following best describes the role of enzymes in chemical reactions?

Accepted Answer

They lower the activation energy, increasing the speed of reactions.

Question 16

Which of the following is a correct statement about DNA and RNA?

Accepted Answer

DNA is double-stranded and contains deoxyribose; RNA is single-stranded and contains ribose.

Question 17

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water molecules are polar and can surround and separate ions.

Question 18

Which of the following statements about the pH scale is correct?

Accepted Answer

A solution with pH 7 is neutral, having equal concentrations of H$$^+$$ and OH$$^-.$$

Question 19

Which of the following is a correct example of a buffer system in the human body?

Accepted Answer

Bicarbonate buffer system

Question 20

Which of the following best describes the process of hydrolysis?

Accepted Answer

Polymers are broken down into monomers by the addition of a water molecule.

Chapter 2: Chemistry Comes Alive – Study Notes for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드