Q: Which of the following equations correctly represents the hydrolysis of ATP?

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

Question 1

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

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while unsaturated fatty acids contain one or more double bonds between carbon atoms.

Question 2

A patient is diagnosed with a genetic disorder that affects the structure of their cell membranes, making them less fluid. Which component is most likely altered?

Accepted Answer

Cholesterol

Question 3

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

Accepted Answer

The sequence of amino acids joined by peptide bonds

Question 4

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

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

Question 5

A cell is placed in a solution and water moves into the cell, causing it to swell. Which type of solution is the cell in, and what process is occurring?

Accepted Answer

Hypotonic solution; osmosis

Question 6

Which of the following best describes the role of enzymes in biological systems?

Accepted Answer

They lower the activation energy required for chemical reactions.

Question 7

Which of the following is NOT a function of proteins found in the plasma membrane?

Accepted Answer

Storing genetic information

Question 8

Which of the following best explains why facilitated diffusion requires membrane proteins?

Accepted Answer

Because some molecules are too large or polar to pass through the lipid bilayer directly

Question 9

A scientist is studying a cell that uses energy to move sodium ions against their concentration gradient. Which type of membrane transport is being observed?

Accepted Answer

Primary active transport

Question 10

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

Accepted Answer

The arrangement and interaction of multiple polypeptide subunits

Question 11

Which of the following is a correct pairing of a nitrogenous base in DNA according to the Watson-Crick model?

Accepted Answer

Adenine with Thymine

Question 12

Which of the following best describes the process of pinocytosis?

Accepted Answer

The cell engulfs extracellular fluid and its dissolved solutes by forming vesicles

Question 13

Which of the following is a polysaccharide used for energy storage in animals?

Accepted Answer

Glycogen

Question 14

A mutation causes a protein to lose its tertiary structure but retain its primary and secondary structures. Which of the following is most likely to be affected?

Accepted Answer

The protein's overall three-dimensional shape and function

Question 15

Which of the following best describes the function of peripheral proteins in the plasma membrane?

Accepted Answer

They are attached to the membrane surface and often function in cell signaling or as part of the cytoskeleton.

Question 16

Which of the following is true regarding osmosis?

Accepted Answer

It is the movement of water across a selectively permeable membrane from an area of low solute concentration to high solute concentration.

Question 17

Which of the following best describes the difference between primary and secondary active transport?

Accepted Answer

Primary active transport uses ATP directly, while secondary active transport uses the energy from an existing gradient.

Question 18

Which of the following is a correct description of the central dogma of molecular biology?

Accepted Answer

DNA is transcribed to RNA, which is translated to protein.

Question 19

A cell needs to import glucose, which is a large polar molecule, into its cytoplasm. Which of the following is the most likely mechanism?

Accepted Answer

Facilitated diffusion through a carrier protein

Question 20

Which of the following best explains why phospholipids are well-suited to form the plasma membrane?

Accepted Answer

They have hydrophilic heads and hydrophobic tails, allowing them to form a bilayer in aqueous environments.

Fundamentals of Organic Compounds and Cell Structure in Anatomy & Physiology

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