Unit 2: Cellular Biochemistry Exam

Which biomolecules (THREE) are found in the cell membrane?

• lipids

• proteins

• nucleic acids

• carbohydrates

Which biomolecule makes up MOST of the cell membrane?

• proteins

• carbohydrates

• phospholipids

• nucleic acids

Which biomolecule helps LARGE molecules cross the membrane?

• phospholipids

• carbohydrates

• nucleic acids

• proteins

Which TWO parts of the membrane allow molecules to pass through?

Match the following functions to each biomolecule in the cell membrane:

• carbohydrates

• allow small molecules to pass through the membrane

• phospholipids

• transport LARGE/charged molecules through the membrane

• proteins

• cell recognition

How does the cell membrane help maintain homeostasis in each cell?

• The cell membrane allows all substances to pass through freely

• The cell membrane controls the movement of substances in and out of the cell

• The cell membrane provides energy for the cell

• The cell membrane produces proteins necessary for cell function

Tags

NGSS.HS-LS1-3

Passive transport ​ (a)   require energy because it moves ​ (b)   the concentration gradient, from ​ (c)   .

• does NOT
• does
• with
• against
• high to low
• low to high

Active transport ​ (a)   require energy because it moves ​ (b)   the concentration gradient, from ​ (c)   .

• does NOT
• does
• with
• against
• high to low
• low to high

What is the correct description of the transport in the image?

• small molecules crossing the lipid bilayer (diffusion)

• large molecules crossing through a protein (facilitated diffusion)

• many molecules coming into the cell using a membrane vesicle (endocytosis)

• many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)

What is the correct description of the transport in the image?

• small molecules crossing the lipid bilayer (diffusion)

• large molecules crossing through a protein (facilitated diffusion)

• many molecules coming into the cell using a membrane vesicle (endocytosis)

• many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)