Question

1. Enzymes have an optimal activity under specific physiological conditions because pH and temperature affect A....

1. Enzymes have an optimal activity under specific physiological conditions because pH and temperature affect

A. enzyme concentration

B. enzyme specificity

C. enzyme shape

D. enzyme composition

2. In coupled reactions

exergonic reactions drive endergonic reactions

endergonic reactions inhibit exergonic reactions

exergonic reactions inhibit endergonic reactions

endergonic reactions drive exergonic reactions

Homework Answers

Answer #1

I believe the correct answer to be:

1) Option C) Enzyme shape.

As the activity of an enzyme is determined by its shape and this shape changes with the environement the protein is placed in so enzymes only work properly in a certain environmental condition.

2) Option A) Exergonic reactions drive endergonic reaction.

As the energy or heat released by the exergonic reaction is used to start the endergonic reaction which require energy to start.

feel free to leave a comment down below for any further query. good rating would be appreciated if you find my answer helpful. thank you.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1.   Which of the following is true of enzyme catalyzed reactions? a.   Reaction rates are temperature dependent b.   Reaction...
1.   Which of the following is true of enzyme catalyzed reactions? a.   Reaction rates are temperature dependent b.   Reaction rates are pH dependent c.   Reaction rates depend on substrate concentration d.   Reaction rates depend on enzyme structure e.   All of the above f.    a, b, and c 2.   Which of the following is NOT true of enzymes? a.   Enzyme activity depends on reaction conditions. b.   Enzymes are catalysts that decrease the rate of reaction. c.   Enzymes can be inhibited by other proteins d.   Enzymes do not alter the change in free energy...
39) Aquaporins and most enzymes are similar in many aspects, but NOT in this: A) They...
39) Aquaporins and most enzymes are similar in many aspects, but NOT in this: A) They are specific for certain molecules B) They are proteins C) They are catalysts D) They have three-dimensional (3-D) structure 40) Organisms do NOT use heat to overcome EA and speed up chemical reactions. Why not? A) Heat would only speed up endergonic reactions B) High temperature might denature cellular proteins C) The energy barrier for most chemical reactions could not be surmounted by heat...
1. Which statement about enzymes is true? A. One enzyme can catalyze many different types of...
1. Which statement about enzymes is true? A. One enzyme can catalyze many different types of reactions for a variety of substrates. B. The shape of an enzyme determines its specificity. C. Enzymes eliminate the activation energy barrier. 2. How would a cell with higher-than-average metabolism compare to a cell with normal metabolism during a specific period of time? A. It would produce larger amounts of waste. B. It would break down substances at the same rate. C. It would...
1)To lower the energy barrier in a reaction, enzymes change the path of the reaction between...
1)To lower the energy barrier in a reaction, enzymes change the path of the reaction between the reactants and products by doing what? A. Destabilizing the transition state by increasing the free energy to be used and lowering the activation energy B. Releasing carbonic acid into the environment to stabilize the transition state and lowering the activation energy C. Reduce the activation energy by stabilizing the transition state and decreasing its free energy D.Supply heat to stabilize the reactants and...
Enzymes are true catalysts because A. they decrease the energy of activation required for the reactions...
Enzymes are true catalysts because A. they decrease the energy of activation required for the reactions they participate in. B. they are required in small amounts and are not consumed in the reaction. C. they increase reaction rates without altering the chemical equilibrium between reactants and products D. All of the above 26. Estimate, by inspection (i.e., no need to use a graph), of the Vmax and Km of an enzyme-catalyzed reaction for which the following data were obtained (pay...
You isolate an enzyme from the human stomach to test its activity. In order to measure...
You isolate an enzyme from the human stomach to test its activity. In order to measure optimal enzyme function, which of the following laboratory conditions should you use in the experimental reactions? a. Solutions with a pH ~2 b. Reaction temperature close to normal body temperature (98.6°F) c. Include substrates for which the enzyme has high affinity d. Include high concentrations of substrate e. All of the above In glycolysis, glucose-6-phosphate (G-6-P) is converted to fructose-6-phosphate (F-6-P). Which of the...
2. Under physiological conditions, the Na+-K+ pump transports sodium and potassium across the membrane through the...
2. Under physiological conditions, the Na+-K+ pump transports sodium and potassium across the membrane through the hydrolysis of ATP. This occurs in a sequence of steps. A. (5pts) Beginning with the START step, put the other steps a-e (currently listed in random order) of the Na+-K+ pump’s mechanism in order to complete a full cycle of transport. START – The protein is phosphorylated open to the extracellular side, and contains 2 K+ ions. a. ATP hydrolysis, protein phosphorylation, and ADP...
1.   Which is not true about autoclaving? a. Autoclaving requires steam under pressure b. Autoclaving requires...
1.   Which is not true about autoclaving? a. Autoclaving requires steam under pressure b. Autoclaving requires maintaining steam at 121oC and 15 psi for 15 minutes c. It is an effective way to pasteurize milk and other liquids d. Steam must come in contact with the surface of the substance being sterilized 2.     We wished to determine the abundance of bacteria in a sample of milk. To do this ten-fold serial dilutions of a one milliliter milk sample were...
READ THE CASE STUDY AND ANSWER THE FOLLOWING QUESTIONS 2nd CASE: An Unexplained Death A 65-year-old...
READ THE CASE STUDY AND ANSWER THE FOLLOWING QUESTIONS 2nd CASE: An Unexplained Death A 65-year-old man of Scandinavian descent was rushed to the Emergency Room of your local hospital after a family member discovered him unconscious in his home. The woman who dialed “911” told the dispatcher that the man, her brother, was the local librarian of the past 10 years and had no spouse or children. She reported that they had spoken the day before, and he had...
When is a hypothesis considered scientific? a. when it is based on something other than observation...
When is a hypothesis considered scientific? a. when it is based on something other than observation b. when it can be tested and is refutable c. when it relies on anecdotal evidence d. when it relies on mystical explanations e. All hypotheses are considered scientific until experiments determine otherwise. 3. Of the following, which is the earliest step in the scientific process? a. generating a hypothesis b. analyzing data c. conducting an experiment d. drawing a conclusion e. developing a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT