Q: Which of the following is a correct representation of 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 polyunsaturated fatty acids in terms of their chemical structure?

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while polyunsaturated fatty acids contain multiple double bonds between carbon atoms.

Question 2

A patient is diagnosed with a genetic disorder that affects the production of carrier proteins in the plasma membrane. Which cellular process would be most directly impaired?

Accepted Answer

Facilitated diffusion

Question 3

Which of the following best explains why enzymes are considered biological catalysts?

Accepted Answer

They lower the activation energy required for chemical reactions.

Question 4

Which of the following is NOT a component of a nucleotide found in DNA?

Accepted Answer

Amino acid

Question 5

Which of the following best describes the role of cholesterol in the plasma membrane?

Accepted Answer

It stabilizes the membrane by modulating its fluidity.

Question 6

A red blood cell is placed in a hypotonic solution. Which process will primarily occur, and what is the likely outcome for the cell?

Accepted Answer

Osmosis; the cell will swell and may burst.

Question 7

Which of the following correctly matches the protein structure level with its description?

Accepted Answer

Tertiary structure: overall three-dimensional folding of a single polypeptide chain

Question 8

Which process requires energy directly from ATP hydrolysis to move substances against their concentration gradient?

Accepted Answer

Primary active transport

Question 9

Which of the following is a correct representation of the hydrolysis of ATP?

Accepted Answer

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

Question 10

Which of the following best describes the function of ribosomal RNA (rRNA) in the cell?

Accepted Answer

It forms the core of the ribosome and catalyzes peptide bond formation during protein synthesis.

Question 11

Which of the following is a property of phospholipids that is critical for the formation of the plasma membrane?

Accepted Answer

They are amphipathic, containing both hydrophilic and hydrophobic regions.

Question 12

Which of the following best describes facilitated diffusion?

Accepted Answer

Movement of molecules down their concentration gradient with the help of membrane proteins, without energy input.

Question 13

Which of the following is NOT a function of integral membrane proteins?

Accepted Answer

Synthesis of DNA in the nucleus

Question 14

Which process is best described by the following scenario: A white blood cell engulfs a bacterium by extending its plasma membrane around the bacterium and internalizing it into a vesicle?

Accepted Answer

Phagocytosis

Question 15

Which of the following statements about Watson and Crick is correct?

Accepted Answer

They proposed the double helix structure of DNA based on X-ray diffraction data.

Question 16

Which of the following best describes secondary active transport?

Accepted Answer

It uses the energy stored in an ion gradient created by primary active transport to move another substance against its gradient.

Question 17

Which of the following is a correct pairing of a nucleic acid and its function?

Accepted Answer

mRNA: carries genetic code from DNA to ribosomes for protein synthesis

Question 18

A solution contains a higher concentration of solute outside the cell than inside. Which direction will water move, and what is this process called?

Accepted Answer

Water will move out of the cell by osmosis.

Question 19

Which of the following best describes the formation of a peptide bond?

Accepted Answer

A covalent bond formed between the amino group of one amino acid and the carboxyl group of another, releasing water.

Question 20

Which of the following is NOT one of the three main parts of a typical eukaryotic cell?

Accepted Answer

Cell wall

Study Guide: Organic Compounds and Cell Structure for Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard