Exploring the Role of CHNOPS in Biochemistry

The video explains the significance of CHNOPS elements (Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur) in living organisms, highlighting their roles in biochemical reactions and biological structures. It details each element's contribution to life, such as carbon's versatility in forming bonds, hydrogen's role in water and acid-base reactions, nitrogen's presence in DNA, oxygen's involvement in oxidizing reactions, phosphorus in DNA and ATP, and sulfur in protein structure. The video also touches on calcium and trace elements, concluding with a challenge to identify molecules containing CHNOPS.

What percentage of living matter on Earth is made up of CHNOPS elements?

• 96%

• 98%

• 99.7%

• 97.9%

Why is carbon considered the backbone of most biological molecules?

• It is similar to silicon.

• It can form a variety of bonds due to its 4 valence electrons.

• It is the most abundant element on Earth.

• It is found in water.

Which element is essential for acid-base behavior in biochemical reactions?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon

What is the primary role of nitrogen in DNA?

• It makes up the nitrogenous bases.

• It is involved in oxidizing reactions.

• It is found in water.

• It forms the backbone of DNA.

Which element is found in the backbone of DNA and in ATP?

• Calcium

• Phosphorus

• Iron

• Sulfur

What percentage of the human body is made up of oxygen by mass?

• 18%

• 3%

• 65%

• 10%

Which two amino acids contain sulfur?

• Serine and Threonine

• Lysine and Arginine

• Glycine and Alanine

• Cysteine and Methionine

What is the primary function of calcium in the human body?

• It forms the backbone of DNA.

• It is found in water.

• It acts in neuron signaling and muscle contraction.

• It is involved in oxidizing reactions.

Which trace element is necessary for hemoglobin?

• Potassium

• Sodium

• Iodine

• Iron

What is the role of iodine in the human body?

• It is needed for thyroid hormones.

• It is involved in oxidizing reactions.

• It forms the backbone of DNA.

• It is found in water.