1 Which of the following is equipment with a constant resistance?
A. Dumbbell
B. Superband
C. Chain
D. Mini band
- Name the enzyme that breaks down (hydrogen peroxide) to water oxygen
a. oxidase
b. gelatinase
d. amylase
c. catalase
e. cytochrome c
The Correct Answer and Explanation is :
1. Which of the following is equipment with a constant resistance?
Answer: A. Dumbbell
Explanation:
A dumbbell is a piece of equipment with a constant resistance. The weight of the dumbbell remains the same regardless of the position or movement. This consistency allows for predictable and measurable resistance during exercises.
In contrast, other equipment like superbands, chains, and mini bands provide variable resistance. For example, superbands offer increasing resistance as they stretch, chains add weight as they lift off the ground, and mini bands provide resistance that changes with the angle of the exercise. These variations can make it more challenging to predict and measure the exact resistance at any given point in the movement.
2. Name the enzyme that breaks down hydrogen peroxide to water and oxygen.
Answer: C. Catalase
Explanation:
Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide into water and oxygen. This reaction is crucial because hydrogen peroxide is a byproduct of various metabolic processes and can be harmful to cells if not broken down efficiently.
The reaction facilitated by catalase is as follows:
2 H₂O₂ → 2 H₂O + O₂
This reaction helps protect cells from oxidative damage by rapidly converting hydrogen peroxide into harmless substances.
Other enzymes listed, such as oxidase, gelatinase, amylase, and cytochrome c, have different functions:
- Oxidase: Involved in oxidation reactions but not specifically in breaking down hydrogen peroxide.
- Gelatinase: Breaks down gelatin and collagen; not involved in hydrogen peroxide metabolism.
- Amylase: Breaks down starches into sugars; unrelated to hydrogen peroxide.
- Cytochrome c: Involved in the electron transport chain for energy production; does not break down hydrogen peroxide.
Therefore, catalase is the correct enzyme responsible for breaking down hydrogen peroxide into water and oxygen.