Question 1

Which of the following best explains why water is considered the 'universal solvent' in biological systems?

Accepted Answer

Because water can dissolve a wide variety of substances due to its polarity and ability to form hydrogen bonds.

Question 2

A patient has a blood pH of 7.2. Which of the following best describes their condition and the body's likely response?

Accepted Answer

The patient is experiencing acidosis, and the body will take up H+ ions to raise the pH.

Question 3

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but 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

A solution is prepared by dissolving 18 grams of glucose (molecular weight = 180 g/mol) in enough water to make 1 liter. What is the molarity of the solution?

Accepted Answer

$$0.1\ 	ext{M}$$

Question 6

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

Accepted Answer

Enzymes act as catalysts, speeding up reactions without being consumed.

Question 7

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

Accepted Answer

Joining two amino acids to form a dipeptide and releasing water.

Question 8

Which of the following statements about ATP is correct?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it through hydrolysis.

Question 9

Which of the following best describes the difference between a solution and a suspension?

Accepted Answer

A solution is a homogeneous mixture, while a suspension is a heterogeneous mixture with large solutes that can settle out.

Question 10

Which of the following is true regarding the octet rule in atoms?

Accepted Answer

Atoms are most stable when their outer shell is full, typically with 8 electrons (except for the first shell, which is full with 2).

Question 11

A patient is suffering from muscle cramps due to an electrolyte imbalance. Which of the following ions is most likely involved?

Accepted Answer

Sodium ions, which are important for nerve conduction and muscle contraction.

Question 12

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

Accepted Answer

They serve as cellular fuel and can be found attached to cell surfaces for identification.

Question 13

Which of the following best describes the structure and function of phospholipids in cell membranes?

Accepted Answer

Phospholipids have hydrophilic and hydrophobic ends, forming a bilayer that regulates what enters and leaves the cell.

Question 14

Which of the following is a correct statement about acids and bases?

Accepted Answer

Bases are proton acceptors and feel slippery.

Question 15

Which of the following is the correct formula for calculating the molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{volume of solution (L)}}$$

Question 16

Which of the following best describes the process of denaturation in proteins?

Accepted Answer

Denaturation is the loss of protein structure and function due to high temperature or changes in pH.

Question 17

Which of the following is a correct statement about the role of DNA in cells?

Accepted Answer

DNA is found in the nucleus and contains the genetic 'recipe' for all proteins in the body.

Question 18

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have only single bonds and are solid at room temperature, while unsaturated fatty acids have one or more double bonds and are liquid at room temperature.

Question 19

Which of the following is the correct value for Avogadro's number?

Accepted Answer

$$6.02 	imes 10$$^{23}$$

Fundamental Chemistry Concepts for Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard