Question 1

Which property of water is most directly responsible for the ability of insects to walk on its surface?

Accepted Answer

Cohesion

Question 2

A scientist discovers a molecule with the formula $\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$. Which class of macromolecule does this molecule most likely belong to?

Accepted Answer

Carbohydrate

Question 3

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

Phospholipids are amphipathic, having both hydrophobic tails and hydrophilic heads

Question 4

Which of the following is NOT a difference between DNA and RNA?

Accepted Answer

DNA contains adenine, RNA does not

Question 5

A mutation causes a protein to lose its ability to form disulfide bonds. Which level of protein structure is most likely to be affected?

Accepted Answer

Tertiary structure

Question 6

Which process is responsible for the breakdown of macromolecules into their monomers?

Accepted Answer

Hydrolysis

Question 7

Which of the following statements about cell theory is FALSE?

Accepted Answer

Cells can arise spontaneously from non-living matter

Question 8

A cell is observed to have a nucleus, mitochondria, and membrane-bound organelles. To which domain does it most likely belong?

Accepted Answer

Eukarya

Question 9

Which of the following best describes the function of chaperone proteins in cells?

Accepted Answer

Prevent misfolding of other proteins

Question 10

Which type of bond is responsible for the base pairing between adenine and thymine in DNA?

Accepted Answer

Hydrogen bond

Question 11

A patient is diagnosed with a disease caused by misfolded proteins that lack nucleic acids. Which infectious agent is most likely responsible?

Accepted Answer

Prion

Question 12

Which of the following modifications is most likely to regulate gene expression by altering chromatin structure?

Accepted Answer

Methyl/acetyl groups

Question 13

Which organelle is primarily responsible for energy production in eukaryotic cells?

Accepted Answer

Mitochondria

Question 14

Which of the following best explains why smaller cells are more efficient at exchanging materials with their environment?

Accepted Answer

They have a higher surface-to-volume ratio

Question 15

Which of the following is a function of glycogen in animal cells?

Accepted Answer

Energy storage

Question 16

Which of the following is true about facilitated diffusion?

Accepted Answer

It uses proteins to passively transport molecules across membranes

Question 17

Which of the following is a correct pairing of a phospholipid component and its property?

Accepted Answer

Fatty acid tails – hydrophobic

Question 18

During DNA replication, which principle ensures that each new DNA molecule contains one old strand and one new strand?

Accepted Answer

Semiconservative replication

Question 19

Which of the following is a correct description of a hydrocarbon?

Accepted Answer

Nonpolar and hydrophobic

Question 20

A researcher is studying a molecule with a backbone of glycerol and two fatty acid tails. Which class of lipid does this molecule most likely belong to?

Accepted Answer

Phosphoglyceride

Core Principles and Macromolecules in Cell Biology

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