NURSING EXAM QUESTIONS
BIOCHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
C H O
|
|
|
C H O N
|
|
|
C H O N P
|
|
|
C H O N S
|
Detailed explanation-1: -Lipids contain the same elements as carbohydrates: carbon, hydrogen and oxygen (C, H, and O). However, lipids are mainly made of hydrocarbon chains (or rings) and contain fewer polar hydroxyl groups (-OH). This makes most lipids nonpolar hydrophobic molecules (they do not dissolve well in water).
Detailed explanation-2: -Carbohydrates and lipids are made of only carbon, hydrogen, and oxygen (CHO). Proteins are made of carbon, hydrogen, oxygen, and nitrogen (CHON). Nucleic acids such as DNA and RNA contain carbon, hydrogen, oxygen, nitrogen, and phosphorus (CHON P).
Detailed explanation-3: -Lipids are an essential component of the cell membrane. The structure is typically made of a glycerol backbone, 2 fatty acid tails (hydrophobic), and a phosphate group (hydrophilic).
Detailed explanation-4: -The ratio of carbon to Hydrogen is one to two, but oxygen is less than one. Lipids are organic compounds that contain the same elements as carbohydrates. In carbohydrates the C:H:O is 1:2:1, this is why they are called carbohydrates, carbon, and hydrous, which is water.
Detailed explanation-5: -Lipids are mainly composed of carbon and hydrogen atoms, and this hydrophobic ("water fearing") nature of lipids is driven by the bonds between these many carbons and hydrogens.