Question 1

Which of the following best describes the difference between an ionic bond and a covalent bond?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Question 2

A patient is found to have a blood pH of 7.25. Which of the following statements is correct regarding this condition?

Accepted Answer

The blood is acidic, and the patient is likely experiencing acidosis.

Question 3

Which of the following is a correct representation of the Law of Complementary Base Pairs in DNA?

Accepted Answer

$$A = T$$ and $$C = G$$

Question 4

Which property of water allows it to help regulate body temperature by absorbing and releasing heat slowly?

Accepted Answer

High heat capacity

Question 5

A molecule of methane ($$CH_4) is $$formed when carbon shares electrons with four hydrogen atoms. What type of bond is formed between carbon and hydrogen in methane?

Accepted Answer

Single covalent bond

Question 6

Which of the following best explains why phospholipids are essential for cell membrane structure?

Accepted Answer

They are amphipathic, containing both hydrophilic heads and hydrophobic tails.

Question 7

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-4}$$ M. What is its pH?

Accepted Answer

$$pH = 4$$

Question 8

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

Accepted Answer

It serves as a precursor for steroid hormones and vitamin D synthesis.

Question 9

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.

Question 10

A patient is given intravenous saline (NaCl) to restore electrolyte balance. Which property of salts makes this possible?

Accepted Answer

Salts easily dissociate into ions in water, providing electrolytes.

Question 11

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

Accepted Answer

The unique sequence of amino acids in a polypeptide chain.

Question 12

Which of the following is true regarding ATP?

Accepted Answer

ATP releases energy when a high-energy phosphate bond is broken.

Question 13

Which of the following is a correct example of a synthesis reaction?

Accepted Answer

$$A + B \rightarrow AB$$

Question 14

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for chemical reactions.

Question 15

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

Accepted Answer

Saturated fats have only single bonds, allowing molecules to pack closely together.

Question 16

Which of the following is a correct description of a buffer in biological systems?

Accepted Answer

A buffer is a chemical that resists changes in pH by accepting or donating hydrogen ions.

Question 17

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

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

Question 18

A molecule of glucose ($$C_6H_{12}O_6$) and a molecule of fructose (C_6H$$_{12}$$O_6) $$combine to form sucrose and water. What type of reaction is this?

Accepted Answer

Dehydration synthesis

Question 19

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

Accepted Answer

Water is polar, allowing it to surround and separate ions.

Question 20

Which of the following is a correct example of an exchange reaction?

Accepted Answer

$$AB + C \rightarrow AC + B$$

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

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드