S3.6 Practice

Quiz
•
Biology
•
9th Grade
•
Hard
+3
Standards-aligned
Megan Ross
FREE Resource
61 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the primary function of the cell membrane?
To produce energy
To maintain the cell's shape
To regulate what enters and exits the cell
To synthesize proteins
Answer explanation
The primary function of the cell membrane is to regulate what enters and exits the cell, maintaining homeostasis and allowing communication with the environment.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What type of molecule primarily makes up the cell membrane?
Carbohydrates
Phospholipids
Proteins
Nucleic acids
Answer explanation
The cell membrane is primarily composed of phospholipids, which form a bilayer that provides structure and regulates the movement of substances in and out of the cell. Carbohydrates, proteins, and nucleic acids play supporting roles.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does "selectively permeable" mean regarding the cell membrane?
All substances can pass through
No substances can pass through
Only certain substances can pass through
It is impermeable to water
Answer explanation
"Selectively permeable" means that the cell membrane allows only certain substances to pass through, while blocking others. This is crucial for maintaining the cell's internal environment, making "Only certain substances can pass through" the correct choice.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following is a type of passive transport?
Protein pumps
Diffusion
Endocytosis
Exocytosis
Answer explanation
Diffusion is a type of passive transport where molecules move from an area of higher concentration to an area of lower concentration without the use of energy. In contrast, protein pumps, endocytosis, and exocytosis require energy.
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diffusion occurs when particles move:
Against the concentration gradient
From high to low concentration
Using cellular energy
Through protein pumps
Answer explanation
Diffusion is the process where particles move from areas of high concentration to areas of low concentration, seeking to equalize their distribution. Thus, the correct answer is 'From high to low concentration'.
Tags
NGSS.MS-LS2-3
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What type of diffusion requires the assistance of membrane proteins?
Simple diffusion
Facilitated diffusion
Osmosis
Active transport
Answer explanation
Facilitated diffusion requires the assistance of membrane proteins to help transport substances across the cell membrane, unlike simple diffusion which occurs without such assistance.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of these processes does not require energy?
Facilitated diffusion
Endocytosis
Active transport
Exocytosis
Answer explanation
Facilitated diffusion is a passive transport process that does not require energy, as it relies on the concentration gradient. In contrast, endocytosis, active transport, and exocytosis all require energy to move substances across the membrane.
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