Glencoe Biology

Alton Biggs

Chapter 6 Chemistry in Biology - all with Video Answers

Educators

Chapter Questions

00:35

Problem 1

Describe the difference between the terms in each set.
electron-proton

Tate Hilken

Numerade Educator

00:35

Problem 2

Describe the difference between the terms in each set.
ionic bond- covalent bond

Tate Hilken

Numerade Educator

03:11

Problem 3

Describe the difference between the terms in each set.
isotope-element

Jessica Wooten

Numerade Educator

02:08

Problem 4

Describe the difference between the terms in each set.
atom-ion

Jessica Wooten

Numerade Educator

01:22

Problem 5

What does the image above show?
A. a covalent bond
$\mathbf{B} .$ a physical property
$\mathbf{C}$ a chemical reaction
D. van der Waals forces
CAN'T COPY THE IMAGE

Jessica Wooten

Numerade Educator

01:11

Problem 6

Which process changes a chlorine atom into a chloride ion?
A. electron gain
B. electron loss
C. proton gain
D. proton loss

Jessica Wooten

Numerade Educator

04:03

Problem 7

Which of the following is a pure substance that cannot be broken down by a chemical reaction?
A. a compound
C. an element
B. a mixture
D. a neutron

Jessica Wooten

Numerade Educator

01:15

Problem 8

How do the isotopes of hydrogen differ?
A. the number of protons
B. the number of electrons
C. the number of energy levels
D. the number of neutrons

Jessica Wooten

Numerade Educator

02:17

Problem 9

Short Answer What is a radioactive isotope? List uses of radioactive isotopes.

Jessica Wooten

Numerade Educator

03:55

Problem 10

Short Answer What factor determines that an oxygen atom can form two covalent bonds while a carbon atom can form four?

Jessica Wooten

Numerade Educator

03:58

Problem 11

Open Ended Why is it important for living organisms to have both strong bonds (covalent and ionic) and weak bonds (hydrogen and van der Waals forces)?

Jessica Wooten

Numerade Educator

02:00

Problem 12

Analyze According to the data, what is the half-life of carbon-14? How can this information be used by scientists?
CAN'T COPY THE GRAPH

Jessica Wooten

Numerade Educator

03:07

Explain The gecko is a reptile that climbs on smooth surfaces such as glass using van der Waals forces to adhere to the surface. How is this method of adhesion more advantageous than covalent interactions?

Jessica Wooten

Numerade Educator

01:27

Problem 14

Match the term on the left with the correct definition on the right.
activation energy
A. a protein that speeds up a reaction
B. a substance formed by a chemical reaction
C. the energy required to start a reaction
D. a substance that binds to
an enzyme

Jessica Wooten

Numerade Educator

00:52

Problem 15

Match the term on the left with the correct definition on the right.
substrate
A. a protein that speeds up a reaction
B. a substance formed by a chemical reaction
C. the energy required to start a reaction
D. a substance that binds to
an enzyme

Jessica Wooten

Numerade Educator

01:20

Problem 16

Match the term on the left with the correct definition on the right.
enzyme
A. a protein that speeds up a reaction
B. a substance formed by a chemical reaction
C. the energy required to start a reaction
D. a substance that binds to
an enzyme

Jessica Wooten

Numerade Educator

01:12

Problem 17

Match the term on the left with the correct definition on the right.
product
A. a protein that speeds up a reaction
B. a substance formed by a chemical reaction
C. the energy required to start a reaction
D. a substance that binds to
an enzyme

Jessica Wooten

Numerade Educator

01:46

Problem 18

Which of the following is a substance that lowers the activation energy?
A. an ion B. a reactant C. a catalyst D. a substrate

Jessica Wooten

Numerade Educator

03:01

Problem 19

In which of the following are bonds broken and new bonds are formed?
A. chemical reactions
B . elements
C. isotopes
D. polar molecules

Jessica Wooten

Numerade Educator

01:40

Problem 20

Which statement is true of chemical equations?
A. Reactants are on the right.
B. Products are on the right.
C. Products have fewer atoms than reactants.
D. Reactants have fewer atoms than products.

Jessica Wooten

Numerade Educator

03:32

Problem 21

Short Answer What features do all reactions involving enzymes have in common?

Jessica Wooten

Numerade Educator

04:01

Problem 22

Open Ended Identify and describe factors that can influence enzyme activity.

Jessica Wooten

Numerade Educator

02:07

Problem 23

Describe the effect temperature has on the rate of the reactions using the graph above.
CAN'T COPY THE GRAPH

Jessica Wooten

Numerade Educator

01:26

Problem 24

Infer Which enzyme is more active in a human cell? Why?
CAN'T COPY THE GRAPH

Jessica Wooten

Numerade Educator

02:09

Problem 25

State the relationship between the terms in each set.
solution-mixture

Jessica Wooten

Numerade Educator

01:43

Problem 26

State the relationship between the terms in each set.
$\mathrm{pH}-$ buffer

Jessica Wooten

Numerade Educator

01:05

Problem 27

State the relationship between the terms in each set.
acid-base

Jessica Wooten

Numerade Educator

01:48

Problem 28

State the relationship between the terms in each set.
solvent-solute

Jessica Wooten

Numerade Educator

03:54

Problem 29

State the relationship between the terms in each set.
polar molecule-hydrogen bond

Jessica Wooten

Numerade Educator

06:17

Problem 30

What does the image above show?
A. a heterogeneous mixture
B. a homogeneous mixtrure
C. a solution
D. a suspension
CAN'T COPY THE FIGURE

Jessica Wooten

Numerade Educator

02:48

Problem 31

Which statement is not true about pure water?
A. It has a pH of 7.0 .
B. It is composed of polar molecules.
C. It is composed of ionic bonds.
D. It is a good solvent.

Jessica Wooten

Numerade Educator

03:21

Problem 32

Which is a substance that produces OH- ions when dissolved in water?
A. a base
B. an acid
C. a buffer
D. salt

Jessica Wooten

Numerade Educator

04:17

Problem 33

Open Ended Why are hydrogen bonds so important for living organisms?

Jessica Wooten

Numerade Educator

01:24

Problem 34

Short Answer Hydrochloric acid (HCl) is a strong acid. What ions are formed when HCl dissolves in
water? What is the effect of HCl on the pH of water?

Jessica Wooten

Numerade Educator

02:02

Problem 35

Open Ended Explain the importance of buffers to living organisms.

Jessica Wooten

Numerade Educator

02:35

Problem 36

Predict two places in the body where buffers are used to limit sharp changes in $\mathrm{pH}$.

Jessica Wooten

Numerade Educator

01:42

Problem 37

Draw a diagram of table salt (NaCl) dissolved in water.

Anand Jangid

Numerade Educator

01:48

Problem 38

Carbohydrates, lipids, proteins, and nucleic acids are _____ .

Jessica Wooten

Numerade Educator

01:03

Problem 39

Proteins are made from that are_____ joined by _____.

Jessica Wooten

Numerade Educator

02:03

Problem 40

______ make up fats, oils, and waxes.

Jessica Wooten

Numerade Educator

01:39

Problem 41

DNA and RNA are examples of _____.

Jessica Wooten

Numerade Educator

01:59

Problem 42

Which two elements are always found in aminc acids?
A. nitrogen and sulfur
B. carbon and oxygen
C. hydrogen and phosphorus
D. sulfur and oxygen

Jessica Wooten

Numerade Educator

02:07

Problem 43

Which joins amino acids together?
A. peptide bonds
B. hydrogen bonds
C. van der Waals forces
D. ionic bonds

Jessica Wooten

Numerade Educator

01:47

Problem 44

Which substance is not part of a nucleotide?
A. a phosphate
B . a base
C . a sugar
D. water

Jessica Wooten

Numerade Educator

02:42

Problem 45

Open Ended Why do cells contain both macromolecules and small carbon compounds?

Jessica Wooten

Numerade Educator

01:38

Problem 46

Open Ended Why can't humans digest all carbohydrates?

Jessica Wooten

Numerade Educator

04:25

Problem 47

Create a table for the four main biological macromolecules that lists their components and functions.

Jessica Wooten

Numerade Educator

02:04

Problem 48

Research and write a job description for a biochemist. Include the types of tasks biochemists perform and materials that are used in their research.

Jessica Wooten

Numerade Educator

01:51

Problem 49

Starch is the major carbon storehouse in plants. Experiments were performed to determine if trehalose might regulate starch production in plants. Leaf discs were incubated for three hours in sorbitol (the control), sucrose, and trelahose solutions. Then, levels of starch and sucrose in the leaves were measured. Use the data to answer the questions below.
CAN'T COPY THE GRAPH
Summarize the production of starch and sucrose in the three solutions.

Jessica Wooten

Numerade Educator

00:31

Problem 50

Starch is the major carbon storehouse in plants. Experiments were performed to determine if trehalose might regulate starch production in plants. Leaf discs were incubated for three hours in sorbitol (the control), sucrose, and trelahose solutions. Then, levels of starch and sucrose in the leaves were measured. Use the data to answer the questions below.
CAN'T COPY THE GRAPH
What conclusion might the researchers have reached based on this data?

Jessica Wooten

Numerade Educator

03:34

Problem 51

How do reproductive strategies differ? (Chapter 4 )

Jessica Wooten

Numerade Educator

03:13

Problem 52

Describe three broad categories of biodiversity value. (Chapter 5 )

Jessica Wooten

Numerade Educator

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