Q: Which of the following is a correct equation for the hydrolysis of ATP?

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Q: Which of the following is a correct representation of a peptide bond formation between two amino acids?

$$\text{Amino acid}_1 + \text{Amino acid}_2 \rightarrow \text{Dipeptide} + \mathrm{H}_2\mathrm{O}$$

Question 1

Which property of water is most critical for maintaining a stable internal temperature in humans during exercise?

Accepted Answer

High heat of vaporization

Question 2

A patient presents with muscle cramps and irregular heartbeats. Blood tests reveal low sodium and potassium levels. Which class of inorganic compounds is most likely involved in this imbalance?

Accepted Answer

Salts

Question 3

Which of the following best describes the process of hydrolysis in the breakdown of macromolecules?

Accepted Answer

Addition of water to split polymers

Question 4

A solution has a pH of 4. Which of the following statements is correct?

Accepted Answer

The solution is acidic and has a higher concentration of H$$^{+}$$ ions than OH$$^{\-}$$ ions.

Question 5

Which of the following is a correct representation of the dissociation of sodium chloride (NaCl) in water?

Accepted Answer

$$\mathrm{NaCl} \rightarrow \mathrm{Na}^{+} + \mathrm{Cl}^{\-}$$

Question 6

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

Accepted Answer

They have both hydrophilic heads and hydrophobic tails, allowing formation of bilayers.

Question 7

A patient is suffering from acidosis. Which of the following buffer systems would help resist changes in blood pH?

Accepted Answer

H$$_2CO$_3/$$HCO$$_3^-$$ buffer system

Question 8

Which of the following is a correct equation for the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 9

Which level of protein structure is primarily determined by hydrogen bonding between the backbone atoms, resulting in alpha helices and beta sheets?

Accepted Answer

Secondary structure

Question 10

A mutation causes a change in the amino acid sequence of a protein. Which level of protein structure is directly affected?

Accepted Answer

Primary structure

Question 11

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 12

Which of the following is a major function of triglycerides in the human body?

Accepted Answer

Storing energy for later use

Question 13

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

Accepted Answer

Unsaturated fatty acids contain one or more double bonds, causing kinks in the chain.

Question 14

Which of the following is a correct pairing of a carbohydrate and its function in the body?

Accepted Answer

Glucose – immediate energy source for cells

Question 15

Which of the following is a correct representation of a peptide bond formation between two amino acids?

Accepted Answer

$$	ext{Amino acid}_1 + 	ext{Amino acid}_2 ightarrow 	ext{Dipeptide} + \mathrm{H}_2\mathrm{O}$$

Question 16

Which of the following molecules is NOT classified as an organic compound?

Accepted Answer

Water

Question 17

Which of the following best explains the role of buffers in blood?

Accepted Answer

Buffers resist changes in pH by accepting or donating H$$^{+}$$ ions.

Question 18

Which of the following is a correct description of the structure of DNA?

Accepted Answer

Double-stranded helix with deoxyribose sugar and complementary base pairing

Question 19

Which of the following is a function of globular proteins in the body?

Accepted Answer

Acting as enzymes to catalyze biochemical reactions

Biochemistry Foundations for Anatomy & Physiology: Water, Inorganic & Organic Compounds, and Cellular Energy

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