{{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 which change the shape of the active site. 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 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

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
5		Large Central Vacuole
2		Nucleus
4		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

Onlevel: Unit 2 Quiz_2026

Onlevel: 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 which change the shape of the active site. What will most likely happen?

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

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?

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-

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 which change the shape of the active site. What will most likely happen?

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

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?

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-

Match the structure to the organelle.

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