BIO11 Unit 1, Topic 1 quiz 3

Which of the following is a key structural difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells have a nucleus, while eukaryotic cells do not.

• Eukaryotic cells have a plasma membrane, while prokaryotic cells do not.

• Prokaryotic cells have membrane-bound organelles, while eukaryotic cells do not.

• Eukaryotic cells have a cell wall, while prokaryotic cells do not.

Which type of cell, prokaryotic or eukaryotic, typically has a larger size and more complex internal structure?

• Prokaryotic cells

• Eukaryotic cells

• Both have similar sizes and complexity

• It depends on the specific organism

Which of the following is a shared structural feature of both prokaryotic and eukaryotic cells?

• Nucleus

• Plasma membrane

• Membrane-bound organelles

• Mitochondria

In terms of cellular structure, what is a characteristic of prokaryotic cells that distinguishes them from eukaryotic cells?

• Presence of a cell wall

• Presence of a nucleus

• Presence of membrane-bound organelles

• Presence of a plasma membrane

Which of the following cellular structures is found in eukaryotic cells but is typically absent in prokaryotic cells?

• Ribosomes

• Nucleus

• Cell membrane

• Plasmid

What is the primary function of an enzyme's active site?

• To bind with substrates

• To release products

• To regulate enzyme activity

• To store energy

The active site of an enzyme is typically:

• Rigid and unchanging

• Hydrophobic

• Highly specific for a particular substrate

• Located outside the enzyme molecule

What type of interaction occurs between the active site of an enzyme and its substrate?

• Hydrophobic interactions

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

Enzymes function as biological catalysts by:

• Increasing the activation energy of a reaction

• Decreasing the activation energy of a reaction

• Storing energy for later use

• Inhibiting chemical reactions

How does the structure of the active site enable enzymes to catalyze specific chemical reactions?

• By having a flexible, shape-changing active site

• By allowing any substrate to bind to it

• By having a non-specific active site

• By having a rigid, unchanging active site