Which of the following statements regarding fats is true?
- Arachidonic acid has 20 carbons excluding the carboxyl carbon
- Glycerol is a trihydroxy propane
- Palmitic acid has 18 carbons including the carboxyl carbon
- Oils have higher melting points than fats
The Correct Option is B
Solution and Explanation
Top Questions on Lipids
- When phospholipid is added and shaken up with water, micelles may form. Which of the following is true regarding micelles?
- A child presents with mental retardation, bone pain, and inability to walk. On funduscopic examination, a cherry red spot is seen. There is no organomegaly. What is the most likely diagnosis?
- A child presents with bone pain and hepatosplenomegaly. A trephine biopsy and aspirate show the following finding. Which of the following is the most likely enzyme deficient in this condition?
- Which of the following is a glycolipid?
- Archaeal cell membranes contain lipids that are
Questions Asked in KEAM exam
- In the measurement of length 6 $\mu$m is equal to $x$ pm. Then the value of $x$ is
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- Dimensional Analysis
- If the lines \( \frac{x-1}{2} = \frac{y-2}{\alpha} = \frac{z-3}{2} \) and \( \frac{x-1}{2} = \frac{y-2}{1} = \frac{z-3}{-2} \) are perpendicular, then the value of \( \alpha \) is:
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- Integration
- An organic compound contains 37.5% C, 12.5% H and the rest oxygen. What is the empirical formula of the compound?
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- Oxygen
- Let A, B, C denote the set of students in a college who play football, basketball, and cricket respectively. If \( n(A) = 60 \), \( n(B) = 55 \), \( n(C) = 70 \), \( n(A \cup B \cup C) = 100 \) and \( n(A \cap B \cap C) = 20 \), then the number of students who play exactly two of these sports is
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- Relations and functions
For the reaction:
\[ 2A + B \rightarrow 2C + D \]
The following kinetic data were obtained for three different experiments performed at the same temperature:
\[ \begin{array}{|c|c|c|c|} \hline \text{Experiment} & [A]_0 \, (\text{M}) & [B]_0 \, (\text{M}) & \text{Initial rate} \, (\text{M/s}) \\ \hline I & 0.10 & 0.10 & 0.10 \\ II & 0.20 & 0.10 & 0.40 \\ III & 0.20 & 0.20 & 0.40 \\ \hline \end{array} \]
The total order and order in [B] for the reaction are respectively:
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- Grignard’s reagents and their uses
Concepts Used:
Lipids
Lipids are organic compounds that are nonpolar molecules, which are soluble only in nonpolar solvents and insoluble in water because of the polarity of the water.
Properties of Lipids:
Lipids are one of the family members of organic compounds, imperturbable of fats and oils. These molecules yield high energy and are mainly responsible for different functionings within the human body. Listed below are some important characteristics of Lipids such as:
- Lipids are oily or greasy nonpolar molecules that are stored in the adipose tissue of the body.
- Lipids are a heterogeneous group of compounds that are mainly composed of hydrocarbon chains.
- Lipids are energy-rich organic molecules, which provide energy for different life processes.
- Lipids are a class of compounds characterized by their solubility in nonpolar solvents and insolubility in water.
- Lipids are consequential in biological systems as they form a mechanical barrier dividing a cell from the external environment known as the cell membrane.