{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

1

Which two biomolecules make up most of the cell membrane, and what role do they play together?

Proteins provide structure; lipids act as channels

Lipids form a barrier; proteins act as channels

Carbohydrates form the barrier; nucleic acids provide channels

Lipids provide energy; carbohydrates act as receptors

1

A fever in the human body causes an enzyme’s active site to denature. What will most likely happen?

The enzyme will bind more substrates than before

The enzyme will no longer function because substrates cannot bind

The enzyme will gain energy and speed up the reaction

The enzyme will break down into smaller proteins

1

Cholesterol is embedded within the phospholipid bilayer. Why is this important for cell function?

It prevents the cell from using ATP

It makes the membrane rigid in all temperatures

It stabilizes fluidity across the membrane-->Keeps the phospholipids together and flexible

It blocks protein channels from functioning

1

Which of the following best explain why the phospholipid bilayer forms a stable barrier in water? Select 2

Hydrophilic heads interact with water

Hydrophobic tails repels away from water

Hydrophobic heads repels away from water

Hydrophilic tails interact with water

1

Which statement best describes the role of enzymes in biological reactions?

They prevent substrates from binding together

They are used up and destroyed in the reaction

They speed up reactions by lowering activation energy

They increase the activation energy required

1

Look at a diagram showing a substrate binding to an enzyme’s active site. What is the main purpose of this interaction?

The enzyme is being used up in the reaction

The substrate lowers the enzyme’s energy needs

The substrate binds to the enzyme, forming a new product

The enzyme permanently changes shape after releasing the product

1

How do enzymes specifically recognize their substrates?

By matching the shape of their active site to the substrate

By randomly binding to any molecule

By using energy from ATP to attract substrates

By changing their structure after every reaction

1

What is the main function of phospholipids in the cell membrane?

They act as enzymes to speed up reactions

They transport oxygen throughout the cell

They store genetic information

They form a semi-permeable barrier between the cell and its environment

1

Why do enzymes only catalyze specific reactions in the cell?

Because they are present in all parts of the cell

Because they use up all available energy

Because their active sites fit only certain substrates

Because they are made of carbohydrates

1

What is this structure for?

minimize water loss

facilitate gas exchange

convert sunlight into usable energy

signal guard cells to open or close

1

What are limiting factors? Select 3.

1

Match the structure to the organelle.

Draggable item		Corresponding Item
3		Cell Wall
6		Cell Membrane
2		Large Central Vacuole
4		Nucleus
5		Chloroplast

1

An enzyme, pepsin, rapidly breaks down a protein molecule in the stomach. It may break down that same protein much more slowly in the small intestine or mouth because-

the stomach may have a more suitable pH for the enzyme to work

the enzyme changes to fit different molecules in different locations

no protein molecules are located in the small intestine or the mouth

the enzyme is digested in those locations

1

Analyze the graph below. Which statement(s) are best supported by the data?

the enzyme trypsin is denature and can no longer bind to its substrate between pH 1-5.

the enzyme pepsin is denature and can no longer bind to its substrate between pH 0-1.

the enzyme pepsin can only bind to its substrate between pH 1-3.

the enzyme trypsin can only bind to its substrate between pH 5.8-9.8

Honors: Unit 2 Quiz_2026

Honors: Unit 2 Quiz_2026

Which two biomolecules make up most of the cell membrane, and what role do they play together?

A fever in the human body causes an enzyme’s active site to denature. What will most likely happen?

Cholesterol is embedded within the phospholipid bilayer. Why is this important for cell function?

Which of the following best explain why the phospholipid bilayer forms a stable barrier in water? Select 2

Which statement best describes the role of enzymes in biological reactions?

Look at a diagram showing a substrate binding to an enzyme’s active site. What is the main purpose of this interaction?

How do enzymes specifically recognize their substrates?

What is the main function of phospholipids in the cell membrane?

Why do enzymes only catalyze specific reactions in the cell?

What is this structure for?

What are limiting factors? Select 3.

Match the structure to the organelle.

An enzyme, pepsin, rapidly breaks down a protein molecule in the stomach. It may break down that same protein much more slowly in the small intestine or mouth because-

Analyze the graph below. Which statement(s) are best supported by the data?

Which two biomolecules make up most of the cell membrane, and what role do they play together?

A fever in the human body causes an enzyme’s active site to denature. What will most likely happen?

Cholesterol is embedded within the phospholipid bilayer. Why is this important for cell function?

Which of the following best explain why the phospholipid bilayer forms a stable barrier in water? Select 2

Which statement best describes the role of enzymes in biological reactions?

Look at a diagram showing a substrate binding to an enzyme’s active site. What is the main purpose of this interaction?

How do enzymes specifically recognize their substrates?

What is the main function of phospholipids in the cell membrane?

Why do enzymes only catalyze specific reactions in the cell?

What is this structure for?

What are limiting factors? Select 3.

Match the structure to the organelle.

Match the structure to the organelle.

An enzyme, pepsin, rapidly breaks down a protein molecule in the stomach. It may break down that same protein much more slowly in the small intestine or mouth because-

Analyze the graph below. Which statement(s) are best supported by the data?

Match the structure to the organelle.

Draggable item		Corresponding Item
Stores water		Cell Wall
provides structure		Cell Membrane
Stores DNA		Large Central Vacuole
Create glucose and oxygen		Nucleus
semipermeable barrier		Chloroplast