Lipids are
A - VCE - SSCE Biology - Question 6 - 2009 - Paper 1
Question 6
Lipids are
A. used as an energy source.
B. involved in active transport.
C. part of glycoprotein molecules.
D. transported by rough endoplasmic reticulum.
Worked Solution & Example Answer:Lipids are
A - VCE - SSCE Biology - Question 6 - 2009 - Paper 1
Step 1
A. used as an energy source.
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Answer
Lipids serve as an important energy source, providing more than double the energy per gram compared to carbohydrates and proteins. They are stored in adipose tissues and utilized during periods of energy demand.
Step 2
B. involved in active transport.
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Answer
Lipids themselves are not directly involved in active transport; however, certain lipids, like phospholipids, contribute to the structure of cell membranes, which are essential for the active transport processes of various molecules.
Step 3
C. part of glycoprotein molecules.
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Lipids are not a direct component of glycoprotein molecules. Glycoproteins predominantly consist of proteins with carbohydrate chains attached. However, some lipids can be involved in stabilizing glycoproteins within the membrane.
Step 4
D. transported by rough endoplasmic reticulum.
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Answer
The rough endoplasmic reticulum (RER) is primarily involved in the synthesis of proteins, not lipids. While it may process some lipid-related proteins, lipids are typically synthesized in the smooth endoplasmic reticulum.
