What is the answer for 25

When a catalyst is present in a biochemical reaction, what is not expected is that the reaction requires more energy than normal (option b).

Explanation:

A catalyst is a substance used to facilitate a chemical reaction, decreasing the reaction time. Unlike a reagent, the catalyst retains the same amount of mass at the end of the reaction.

In a biochemical reaction, the use of a catalyst not only accelerates the reaction, but also decreases the amount of energy required by the process. An example of a biological catalyst is enzymes, specialized proteins that facilitate metabolic reactions.

The other options can be expected with the use of a catalyst, due to:

    a. One of the functions of the catalyst is to decrease the amount of energy needed in a reaction.

    c. Catalysts are substrate specific.

    d. Catalysts work in a specific pH range.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.