Which of the following is true of the below reaction?

There is one reactant and two products involved

This is comparing the reaction rate with an enzyme vs without an enzyme

Energy is absorbed by this reaction

Pepsin, a common enzyme found in the stomach, is most active at pH values between 0.5 and 2.5. It works slowly between pH values of 2.6 and 3.4. Beyond a pH of about 3.5, it becomes completely inactive. Why does this happen?

The enzyme is denatured, changing its active site needed for binding to specific substrates.

The enzyme is enhanced, increasing its active site for binding to specific substrates.

The enzyme is stabilized, maintaining its active site for binding to specific substrates.

The enzyme is replicated, doubling its active site for binding to specific substrates.

Chemical reactions always involve

the breaking of bonds in reactants and the formation of new bonds in products.

the breaking of bonds in reactants.

the formation of new bonds in products.

An enzyme speeds up a reaction by

lowering the activation energy.

What is the final step in the enzyme-substrate interaction?

Products leaving the active site of the enzyme.

Substrate entering the active site of the enzyme.

What is the effect of a pH level that is too low or too high on an enzyme?

The enzyme denatures and no longer works.

The enzyme becomes more active.

The enzyme changes its substrate.

The enzyme's activity remains unchanged.

What happens when enzymes are heated to a high temperature?

The shape of the enzyme are changed and it denatures

The enzymes' amino acid sequence changes.

What is the main goal of cell respiration?

to break down glucose in the form of ATP

to make ATP that we use for energy

Respiration is a byproduct of photosynthesis

Is ADP or ATP more like a fully charged battery, and why?

ATP, because it has three phosphate groups; breaking and reforming the bonds among them releases energy.

ADP, because it has three phosphate groups; breaking and reforming the bonds among them releases energy.

ADP, because it has two phosphate groups; breaking and reforming the bonds among them releases energy.

ATP, because it has two phosphate groups; breaking and reforming the bonds among them releases energy.

What is the correct equation for cellular respiration?

6O 2 + C 6 H 12 O 6 -> 6CO 2 + 6H 2 O + Energy

6O 2 + C 6 H 12 O 6 + Energy -> 6CO 2 + 6H 2 O

6CO 2 + 6H 2 O -> 6O 2 + C 6 H 12 O 6 + Energy

6CO 2 + 6H 2 O + Energy -> 6O 2 + C 6 H 12 O 6

A common cycle in biology is represented above. The ATP molecule above is commonly used to

actively transport molecules in an organism

diffuse water across a membrane

move molecules from a high to a low concentration

balance the nutrients in an ecosystem

Which of the following statements is true about plant cells?

They have both chloroplasts and mitochondria.

They have neither chloroplasts nor mitochondria.

How does ATP provide energy for the cell?

The bond between the second and third phosphate are broken to release energy.

The bond between the first and second phosphate is broken to release energy.

The bond between the adenine and the sugar is broken to release energy.

The bond between the sugar and phosphates are broken and release energy.

The diagram below shows the relationship between photosynthesis and cellular respiration and the organelles in which they occur. Which statement describes how photosynthesis and cellular respiration are interrelated?

Carbon dioxide and water released by cellular respiration are used in photosynthesis.

Oxygen is produced during cellular respiration and stored during photosynthesis.

Photosynthesis releases the energy that is stored during the process of cellular respiration.

Glucose is used during cellular respiration to produce food that is broken down during photosynthesis.

Which of the following is the correct equation for PHOTOSYNTHESIS?

light + carbon dioxide + water --> glucose + oxygen

carbon dioxide + sugar + water --> oxygen + light

oxygen + light + water --> carbon dioxide + sugar

carbon dioxide + oxygen + water --> Light+ Sugar

What does a plant release into the air?

Plants release oxygen into the air.

Plants release carbon dioxide into the air.

Plants release sugar into the air.

Plants release bacon into the air.

What is the overall effect that plants have on the environment when it comes to the concentration levels of CO 2 and O 2 ?

O 2 increases and CO 2 decreases

CO 2 increases and O 2 decreases

O 2 increases and CO 2 remains constant

CO 2 increases and O 2 remains constant

If carbon dioxide is removed from a plant's environment, what would you expect to happen to its production of sugar (glucose)?

The same number of sugars would be produced, but without carbon dioxide

Carbon dioxide does not affect the production of sugars in plants

How does most of the water needed by the plant get into its leaves?

The roots absorb it and then it travels up the stem

It's made during a chemical reaction in the leaf

The flowers capture water and deliver it to the leaves

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Grace Nunez

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The energy needed to start a chemical reaction

Catalyst

Activation Energy

Substrates

Reactants

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Look at this reaction graph. Which of the following is NOT true of this reaction?

The reactants have lower energy than the product

This is showing an endothermic reaction

Activation energy was not needed for this to occur

The product has more energy than the reactants

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is TRUE of enzymes?.

Enzymes are not found in living organisms

Enzymes help to speed up chemical reactions

Enzymes are made carbohydrates

Enzymes increase the activation energy of a chemical reaction

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In this diagram A is the

substrate

enzyme

enzyme-substrate complex

product

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Enzymes are also considered to be biological ____________

catalysts

organisms

life

denatures

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The substance(s) that enter an enzyme and are either joined or broken apart

Reactants

Products

Substrates

Denatures

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The area of an enzyme where the substrate binds to the enzyme

Product

Active Site

Catalyst

Complex

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The energy needed to start a chemical reaction

Look at this reaction graph. Which of the following is NOT true of this reaction?

Which of the following statements is TRUE of enzymes?.

In this diagram A is the

Enzymes are also considered to be biological ____________

The substance(s) that enter an enzyme and are either joined or broken apart

The area of an enzyme where the substrate binds to the enzyme

Which molecules in this reaction are the products?

Which molecules in this reaction are the reactants?

What term is used to describe the process of an enzyme changing shape due to extreme heat or pH levels?

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