Question 1

Most human enzymes work best within the range of:

Accepted Answer

A) pH 3 - 5 
B) pH 4 - 6 
C) pH 6 - 8 
D) pH 8 - 10 
E) pH 11 - 14 
A) pH 3 - 5 
B) pH 4 - 6 
C) pH 6 - 8 
D) pH 8 - 10 
E) pH 11 - 14 C

Question 2

The making and breaking of chemical bonds is called:

Accepted Answer

A) entropy reactions 
B) chemical reactions 
C) thermodynamic reactions 
D) catalysis reactions 
E) activation energy reactions 
A) entropy reactions 
B) chemical reactions 
C) thermodynamic reactions 
D) catalysis reactions 
E) activation energy reactions B

Question 3

The First Law of Thermodynamics states that ________________

Accepted Answer

Energy can be converted from one form to aher,but can be destroyed

Question 4

Energy flows into the biological world from the:

Accepted Answer

A) oceans 
B) plants 
C) sun 
D) volcanoes 
E) large animals 
A) oceans 
B) plants 
C) sun 
D) volcanoes 
E) large animals

Question 5

Reactions that tend to go on their own,releasing energy,are called:

Accepted Answer

A) endergonic 
B) exergonic 
C) catalytic 
D) productive 
A) endergonic 
B) exergonic 
C) catalytic 
D) productive

Question 6

All of the following are correct about energy except:

Accepted Answer

A) The biological world gets its energy from the sun. 
B) Chemical bonds store potential energy. 
C) All forms of energy can be converted to heat. 
D) Energy is defined as the ability to do work. 
E) A boulder perched on a hill has kinetic energy. 
A) The biological world gets its energy from the sun. 
B) Chemical bonds store potential energy. 
C) All forms of energy can be converted to heat. 
D) Energy is defined as the ability to do work. 
E) A boulder perched on a hill has kinetic energy.

Question 7

The study of energy is called _____________.

Accepted Answer

The answer of The study of energy is called _____________....

Question 8

A ball sitting on a table top has __________ energy because of its position.

Accepted Answer

The answer of A ball sitting on a table top...

Question 9

Explain the components of an ATP molecule.

Accepted Answer

An ATP molecule is composed of three sub

Question 10

A measure of the degree of disorder in a system is called __________.

Accepted Answer

The answer of A measure of the degree of disorder...

Question 11

The site on the enzyme surface where the reactant fits is referred to as the:

Accepted Answer

A) reactive site 
B) allosteric site 
C) active site 
D) binding site 
A) reactive site 
B) allosteric site 
C) active site 
D) binding site

Question 12

Which is incorrect about enzymes?

Accepted Answer

A) Many drugs,like statin drugs,work by inhibiting key enzymes in cells. 
B) A noncompetitive inhibitor of enzymes interferes with the active site of the enzyme. 
C) Enzymes need to have a precise shape to work correctly. 
D) In humans,extremely high fevers can be fatal because enzymes begin to unfold and stop working. 
E) Some enzymes can work in extreme temperatures or very low pH. 
A) Many drugs,like statin drugs,work by inhibiting key enzymes in cells. 
B) A noncompetitive inhibitor of enzymes interferes with the active site of the enzyme. 
C) Enzymes need to have a precise shape to work correctly. 
D) In humans,extremely high fevers can be fatal because enzymes begin to unfold and stop working. 
E) Some enzymes can work in extreme temperatures or very low pH.

Question 13

All cells convert the potential energy found in food molecules into ATP through:

Accepted Answer

A) cellular respiration 
B) photosynthesis 
C) feedback inhibition 
D) entropy 
E) catalysis 
A) cellular respiration 
B) photosynthesis 
C) feedback inhibition 
D) entropy 
E) catalysis

Question 14

Enzymes are catalysts because they operate to:

Accepted Answer

A) lower activation energy 
B) raise activation energy 
C) supply activation energy 
D) supply the reactants 
A) lower activation energy 
B) raise activation energy 
C) supply activation energy 
D) supply the reactants

Question 15

ATP is composed of a sugar,the organic base adenine,and:

Accepted Answer

A) three phosphate groups 
B) two phosphate groups 
C) three nitrate groups 
D) phenylalanine 
A) three phosphate groups 
B) two phosphate groups 
C) three nitrate groups 
D) phenylalanine

Question 16

The site where a signal molecule binds to the surface of an enzyme is the ______________ site.

Accepted Answer

The answer of The site where a signal molecule binds...

Question 17

Explain how enzymes are regulated by feedback inhibition.

Accepted Answer

Enzymes can be regulated by a mechanism

Question 18

A competitive inhibitor interferes with:

Accepted Answer

A) the active site of the enzyme so a substrate cannot bind 
B) the repressor site of the enzyme so a substrate cannot bind 
C) the allosteric site of the enzyme so a substrate cannot bind 
D) the oxidized site of the enzyme so a substrate cannot bind 
E) the reduced site of the enzyme so a substrate cannot bind 
A) the active site of the enzyme so a substrate cannot bind 
B) the repressor site of the enzyme so a substrate cannot bind 
C) the allosteric site of the enzyme so a substrate cannot bind 
D) the oxidized site of the enzyme so a substrate cannot bind 
E) the reduced site of the enzyme so a substrate cannot bind

Question 19

The extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called:

Accepted Answer

A) exergonic energy 
B) endergonic energy 
C) kinetic energy 
D) activation energy 
E) catalytic energy 
A) exergonic energy 
B) endergonic energy 
C) kinetic energy 
D) activation energy 
E) catalytic energy

Question 20

Objects that are not actively moving but have the capacity to do so are said to possess:

Accepted Answer

A) kinetic energy 
B) potential energy 
C) entropy 
D) living energy 
A) kinetic energy 
B) potential energy 
C) entropy 
D) living energy

Exam 5: Energy and Life

Most human enzymes work best within the range of:

The making and breaking of chemical bonds is called:

The First Law of Thermodynamics states that ________________

Energy flows into the biological world from the:

Reactions that tend to go on their own,releasing energy,are called:

All of the following are correct about energy except:

The study of energy is called _____________.

A ball sitting on a table top has __________ energy because of its position.

Explain the components of an ATP molecule.

A measure of the degree of disorder in a system is called __________.

The site on the enzyme surface where the reactant fits is referred to as the:

Which is incorrect about enzymes?

All cells convert the potential energy found in food molecules into ATP through:

Enzymes are catalysts because they operate to:

ATP is composed of a sugar,the organic base adenine,and:

The site where a signal molecule binds to the surface of an enzyme is the ______________ site.

Explain how enzymes are regulated by feedback inhibition.

A competitive inhibitor interferes with:

The extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called:

Objects that are not actively moving but have the capacity to do so are said to possess:

The Science of Biology

The Chemistry of Life

Molecules of Life

Cells

Photosynthesis: Acquiring Energy From the Sun

How Cells Harvest Energy From Food

Mitosis

Meiosis

Foundations of Genetics

DNA: the Genetic Material

How Genes Work

Genomics and Biotechnology

Evolution and Natural Selection

How We Name Living Things

Prokaryotes: the First Single-Celled Creatures

Protists: Advent of the Eukaryotes

Fungi Invade the Land

Evolution of the Animal Phyla

History of the Vertebrates

How Humans Evolved

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Animal Body Defends Itself

The Nervous System

The Senses

Chemical Signaling Within the Animal Body

Reproduction and Development

Evolution of Plants

Plant Form and Function

Plant Reproduction and Growth

Populations and Communities

Ecosystems

Behavior and the Environment

Human Influences on the Living World

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