QQuestionBiology
QuestionBiology
Which of the following are phospholipids? Select all that apply.
$\square$ prostaglandins
$\square$ steroids
$\square$ cephalins
$\square$ lecithins
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Step 1:I'll solve this step by step, focusing on identifying phospholipids from the given options.
Step 2:: Understanding Phospholipids
Phospholipids are a class of lipids that consist of: - A glycerol backbone - Two fatty acid chains - A phosphate group - An additional polar molecule attached to the phosphate group
Step 3:: Analyzing Each Option
Step 4:
- $$\text{Prostaglandins} \neq \text{Phospholipids}
Prostaglandins - Prostaglandins are signaling molecules derived from fatty acids - They are NOT phospholipids
Step 5:
- $$\text{Steroids} \neq \text{Phospholipids}
Steroids - Steroids are lipids with a characteristic four-ring structure - They are NOT phospholipids
Step 6:
- $$\text{Cephalins} = \text{Phospholipids} \checkmark
Cephalins - Cephalins are a type of phospholipid - They contain: * Glycerol backbone * Two fatty acid chains * Phosphate group * Ethanolamine as the polar head group
Step 7:
- $$\text{Lecithins} = \text{Phospholipids} \checkmark
Lecithins - Lecithins are also phospholipids - They contain: * Glycerol backbone * Two fatty acid chains * Phosphate group * Choline as the polar head group
Final Answer
The phospholipids in this list are: - Cephalins - Lecithins
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