NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which group of elements combines to form most of the compounds in living things?
A
Carbon, hydrogen, oxygen, nitrogen
B
Carbon, hydrogen, helium, nitrogen
C
Carbon, sodium, chlorine, oxygen
D
Carbon, sulfur, potassium, oxygen
Explanation: 

Detailed explanation-1: -The CHNOPS elements are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. These elements are the most abundant elements found in living things. Together, the six elements of life, form large, organic molecules known as macromolecules or biomolecules.

Detailed explanation-2: -The chemical elements most prominent in building the structures of the molecules of life are carbon, hydrogen, oxygen, nitrogen, phosphorous and sulfur, sometimes represented mnemonically as CHONPS. These elements combine in a vast number of molecules involved in life processes.

Detailed explanation-3: -Answer and Explanation: The organic compound that stores the most energy is lipids. Lipids are fats and one of their main jobs in the body is to store energy. In fact, lipids can be used to generate about twice as much energy as carbohydrates.

Detailed explanation-4: -Most common elements in living things are carbon, hydrogen, nitrogen, and oxygen. These four elements constitute about 95% of your body weight. All compounds can be classified in two broad categories—organic and inorganic compounds. Organic compounds are made primarily of carbon.

Detailed explanation-5: -There are 92 naturally occurring elements, each differing from the others in the number of protons and electrons in its atoms. Living organisms, however, are made of only a small selection of these elements, four of which-carbon (C), hydrogen (H), nitrogen (N), and oxygen (O)-make up 96.5% of an organism’s weight.

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