AP®︎ Biology: Topic 1.5 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 1.5 of AP Biology – Lipids.
Questions List
Topic 1.5
Question 1 Easy
This question tests the following: SYI-1.C
What is the primary role of carbohydrates in cells?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® Biology Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.
Topic 1.5: Lipids
Learning Objective: 1.5.A
Describe the structure and function of lipids.
Essential Knowledge: 1.5.A.1
Lipids are typically nonpolar, hydrophobic molecules whose structure and function are derived from the way their subcomponents are assembled. Fatty acids can be described as either saturated or unsaturated. i. Saturated fatty acids contain only single bonds between carbon atoms. ii. Unsaturated fatty acids contain at least one double bond between carbon atoms, which causes the carbon chain to kink. iii. The more double bonds in a fatty acid tail, the more unsaturated the lipid becomes. iv. The more unsaturated a lipid is, the more liquid it is at room temperature.
Essential Knowledge: 1.5.A.2
Lipids provide a variety of functions for living organisms. Some examples of lipids are fats, steroids including cholesterol, and phospholipids. i. Fats provide energy storage and support cell function. In some cases, they can also provide insulation to help keep mammals warm. ii. Steroids are hormones that support physiological functions including growth and development, energy metabolism, and homeostasis. iii. Cholesterol provides essential structural stability to animal cell membranes. iv. Phospholipids group together to form the lipid bilayers found in plasma and cell membranes. Exclusion: The molecular structure of specific lipids is beyond the scope of the AP Exam.
