Energy Homework (10/4/16)

Question 1

During a Chemical reaction which molecules become reduced?

Answer 1

Molecules that have one or more electrons added.

Question 2

• the statements that are true of exergonic reactions.

Answer 2

• Exergonic reactions are spontaneous

- Exergonic reactions release energy during product formation.

Question 3

_____ are proteins or RNA molecules that act as catalysts to speed up reactions in living organisms

Answer 3

enyzmes

Question 4

• What is a substrate?

Answer 4

A reactant molecule that binds to the active site of an enzyme

Question 5

*Characteristics pf Enzymes

Answer 5

• Enzymes are not cahnged or consumed inre actions
• Enzymes may be used more than once in a cell
• Enzymes are genrally proteins that functionsas catalysts

Question 6

• How many different kinds of enzymes are known in total?

Answer 6

Thousands

Question 7

• TRUE or FALSE: All cells have the same set of enzymes.

Answer 7

False

Question 8

• events that must occur before bonds in the substrate are broken during an enzyme catalyzed reaction.

Answer 8

• Amino acids in the enzymes must interact withe substrate
• Substrate must bind the enzyme
• A substrate-enzyme complex must form

Question 9

Which of the following describes the active site of an enzyme

Answer 9

It is the part of the enzyme where the substrate fits.

Question 10

What is produced by the binding of enzyme and substrate?

Answer 10

enzyme-substrate complex

Question 11

The binding of a substrate usually produces a slight change in the enzyme’s shpae resulting in a better enzyme substrate fit this is called ____

Answer 11

induced

Question 12

*All of the enzymes that a cell has are found in the cells’ cytoplasm

Answer 12

FALSE

Question 13

Statements that accurately describe multienzyme complexes

Answer 13

Enzymes in multienzyme complexes catalyze a sequences of reactions

Within the multienzyme complex, products of one reaction can be dleivered to the next reaction

Multienzyme complexes improve catalytic effieciency

Question 14

A more efficient way to catalyze a sequence of related biochemical reactions is to combine several proteins into a _____ complex, in this way, the product of each reaction can be delivered to the next enzyme, without being released to diffuse away.

Answer 14

multienzyme

Question 15

*True about ribozymes

Answer 15

• Ribozymes show high sunstrate specificity

SOme ribozymes catalyze reactions on themselves

Ribozymes can grealty acceerate the rate of a reaction

Question 16

Increasing the temperature of an uncatalyzed reaction ______ the rate of that reaction.

Answer 16

increases