NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the purpose of the proteins called enzymes?
A
speeds up chemical reactions that occur in the body.
B
main source of energy in living things.
C
energy storage for animals
D
determines traits in organisms.
Explanation: 

Detailed explanation-1: -Enzymes are proteins that act upon substrate molecules and decrease the activation energy necessary for a chemical reaction to occur by stabilizing the transition state. This stabilization speeds up reaction rates and makes them happen at physiologically significant rates.

Detailed explanation-2: -Enzymes (and other catalysts) act by reducing the activation energy, thereby increasing the rate of reaction. The increased rate is the same in both the forward and reverse directions, since both must pass through the same transition state.

Detailed explanation-3: -An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell.

Detailed explanation-4: -Enzymes help speed up chemical reactions in the human body. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles. Each cell in the human body contains thousands of enzymes. Enzymes provide help with facilitating chemical reactions within each cell.

There is 1 question to complete.