Question 1

Which of the following best describes the structure of the cell envelope in bacteria, as depicted in the first image?

Accepted Answer

It includes all layers surrounding the cell, such as the cell membrane and cell wall.

Question 2

Based on the second image, which of the following is a major component of biological membranes that contributes to the fluid mosaic model?

Accepted Answer

Phospholipids, proteins, and cholesterol

Question 3

Referencing the third image, what type of chemical linkage connects the glycerophosphate head to the fatty acid tails in bacterial and eukaryotic phospholipids?

Accepted Answer

Ester linkage

Question 4

According to the fourth image, what is the primary difference between bacterial and eukaryotic cell membranes?

Accepted Answer

Eukaryotic membranes contain cholesterol and lipid rafts, making them more rigid.

Question 5

Based on the fifth image, which of the following statements is TRUE regarding archaeal membrane lipids?

Accepted Answer

They contain isoprene chains linked by ether bonds.

Question 6

The sixth image shows two types of archaeal lipid layers. Which type of archaeal lipid layer is more likely to be found in thermophilic archaea?

Accepted Answer

Diglycerol tetraether lipid monolayer

Question 7

In the seventh image, which type of membrane protein is covalently attached to lipid molecules within the bilayer?

Accepted Answer

Lipid-anchored membrane protein

Question 8

Referencing the eighth image, which function is NOT typically performed by membrane-associated proteins?

Accepted Answer

DNA replication

Question 9

Based on the tenth image, what is required for a molecule to move against its concentration gradient?

Accepted Answer

Energy input is required

Question 10

The eleventh image demonstrates diffusion. Which of the following best describes the process shown?

Accepted Answer

Molecules move from high to low concentration until equilibrium is reached

Question 11

According to the twelfth image, which molecule can most easily diffuse across a biological membrane without the help of a protein?

Accepted Answer

O2

Question 12

The fourteenth image shows types of membrane transport. Which process is also called 'cell eating'?

Accepted Answer

Phagocytosis

Question 13

Based on the sixteenth image, which type of transporter moves two molecules in opposite directions across the membrane?

Accepted Answer

Antiporter

Question 14

The seventeenth image shows three types of environments. What will happen to a red blood cell placed in a hypotonic solution?

Accepted Answer

It will swell and may burst

Question 15

Referencing the nineteenth image, in which direction does water move during osmosis?

Accepted Answer

From hypotonic to hypertonic

Question 16

Based on the twenty-first image, which type of molecules require facilitated diffusion to cross the cell membrane?

Accepted Answer

Charged ions like Na+ and Ca2+

Cell Structure and Function: The Cell Envelope and Biological Membranes

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