Question 1

Which of the following inventions led to trans fats being marketed as a solid cooking fat?

Accepted Answer

A)  the electric light 
B)  the telephone 
C)  the automobile 
D)  the microwave oven 
E)  the refrigerator 
A)  the electric light 
B)  the telephone 
C)  the automobile 
D)  the microwave oven 
E)  the refrigerator A

Question 2

For a given element,all atoms of that element have the same number of

Accepted Answer

A)  neutrons. 
B)  electrons. 
C)  protons. 
D)  protons and neutrons. 
E)  ions. 
A)  neutrons. 
B)  electrons. 
C)  protons. 
D)  protons and neutrons. 
E)  ions. C

Question 3

Which molecule is INCORRECTLY matched with its component part?

Accepted Answer

A)  fat: fatty acid. 
B)  starch: glycerol. 
C)  protein: amino acid. 
D)  glycogen: glucose. 
E)  nucleic acids: nucleotide. 
A)  fat: fatty acid. 
B)  starch: glycerol. 
C)  protein: amino acid. 
D)  glycogen: glucose. 
E)  nucleic acids: nucleotide. B

Question 4

The positively charged ion,potassium,and the negatively charged ion,fluoride,will form what kind of bond?

Accepted Answer

A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  hydrogen 
E)  isotonic 
A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  hydrogen 
E)  isotonic

Question 5

In which of the following biological systems have radioactive tracers been used?

Accepted Answer

A)  cells 
B)  bodies 
C)  ecosystems 
D)  all of these 
E)  all of these except ecosystems 
A)  cells 
B)  bodies 
C)  ecosystems 
D)  all of these 
E)  all of these except ecosystems

Question 6

Which of the following is true about the metabolism of trans fatty acids?

Accepted Answer

A)  we have evolved the enzymes to hydrolyze trans fatty acids 
B)  we have enzymes to hydrolze cis fatty acids but not trans fatty acids 
C)  we can metabolize about half of the trans fatty acids we consume but no more than that 
D)  we cannot metabolize either cis or trans fatty acids 
E)  more than one of these is correct 
A)  we have evolved the enzymes to hydrolyze trans fatty acids 
B)  we have enzymes to hydrolze cis fatty acids but not trans fatty acids 
C)  we can metabolize about half of the trans fatty acids we consume but no more than that 
D)  we cannot metabolize either cis or trans fatty acids 
E)  more than one of these is correct

Question 7

The nucleus of an atom contains

Accepted Answer

A)  protons 
B)  electrons 
C)  neutrons 
D)  protons and neutrons 
E)  protons and electrons 
A)  protons 
B)  electrons 
C)  neutrons 
D)  protons and neutrons 
E)  protons and electrons

Question 8

Glucose dissolves in water because it

Accepted Answer

A)  ionizes. 
B)  is a polysaccharide. 
C)  is a polar and forms many hydrogen bonds with water molecules. 
D)  has a very reactive primary structure. 
E)  is an isotope. 
A)  ionizes. 
B)  is a polysaccharide. 
C)  is a polar and forms many hydrogen bonds with water molecules. 
D)  has a very reactive primary structure. 
E)  is an isotope.

Question 9

Match the following letters to the number with which they best correspond.
-forms of an element that differ in the number of neutrons their atoms carry.

Accepted Answer

A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions 
A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions

Question 10

Hydrogenated vegetable oil or trans fats are

Accepted Answer

A)  as healthy as natural vegetable oil. 
B)  as healthy as animal fats. 
C)  more healthy than animal fats. 
D)  less healthy than animal fats or vegetable oils. 
E)  more healthy than vegetable oils. 
A)  as healthy as natural vegetable oil. 
B)  as healthy as animal fats. 
C)  more healthy than animal fats. 
D)  less healthy than animal fats or vegetable oils. 
E)  more healthy than vegetable oils.

Question 11

Phosphorus
Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s).
-How many electrons are in the second electron shell of a phosphorus atom?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  8 
A)  1 
B)  2 
C)  3 
D)  5 
E)  8

Question 12

Protein misfolding causes

Accepted Answer

A)  Creutzfeldt-Jakob disease. 
B)  arthritis. 
C)  immunodepression. 
D)  schizophrenia. 
E)  tuberculosis. 
A)  Creutzfeldt-Jakob disease. 
B)  arthritis. 
C)  immunodepression. 
D)  schizophrenia. 
E)  tuberculosis.

Question 13

Which of the following organisms can more likely break down cellulose?

Accepted Answer

A)  a fungus 
B)  a cow 
C)  a human 
D)  a horse 
E)  a plant 
A)  a fungus 
B)  a cow 
C)  a human 
D)  a horse 
E)  a plant

Question 14

A nucleotide is constituted of

Accepted Answer

A)  a five carbon sugar, a nitrogenous acid, and a phosphate group. 
B)  a six carbon sugar, a nitrogenous base, and a phosphate group. 
C)  a five carbon sugar, a nitrogenous base, and a phosphate group. 
D)  a six carbon sugar, a nitrogenous acid, and a phosphate group. 
E)  a four carbon sugar, a nitrogenous acid, and a phosphate group. 
A)  a five carbon sugar, a nitrogenous acid, and a phosphate group. 
B)  a six carbon sugar, a nitrogenous base, and a phosphate group. 
C)  a five carbon sugar, a nitrogenous base, and a phosphate group. 
D)  a six carbon sugar, a nitrogenous acid, and a phosphate group. 
E)  a four carbon sugar, a nitrogenous acid, and a phosphate group.

Question 15

Which of the following statements is (are)TRUE about radioisotopes?

Accepted Answer

A)  Radioisotope decays at a constant rate. 
B)  Decay of a radioisotope is independent of temperature. 
C)  Decay of a radioisotope is independent of pressure. 
D)  A radioisotope decays into a predictable product. 
E)  All of these are true. 
A)  Radioisotope decays at a constant rate. 
B)  Decay of a radioisotope is independent of temperature. 
C)  Decay of a radioisotope is independent of pressure. 
D)  A radioisotope decays into a predictable product. 
E)  All of these are true.

Question 16

Which of the following substances is hydrophobic?

Accepted Answer

A)  canola oil 
B)  sodium chloride 
C)  sugar 
D)  water 
E)  the potassium ion 
A)  canola oil 
B)  sodium chloride 
C)  sugar 
D)  water 
E)  the potassium ion

Question 17

Carbon 14 radioisotopes decay into stable

Accepted Answer

A)  carbon 13 isotopes. 
B)  nitrogen atoms. 
C)  carbon atoms. 
D)  nitrogen 15 isotopes. 
E)  sodium atoms. 
A)  carbon 13 isotopes. 
B)  nitrogen atoms. 
C)  carbon atoms. 
D)  nitrogen 15 isotopes. 
E)  sodium atoms.

Question 18

Cellulose is

Accepted Answer

A)  the most complex of the organic compounds. 
B)  a polymer of glucose and fructose. 
C)  a polymer of glucose and galactose. 
D)  a component of plasma membranes. 
E)  a material found in plant cell walls. 
A)  the most complex of the organic compounds. 
B)  a polymer of glucose and fructose. 
C)  a polymer of glucose and galactose. 
D)  a component of plasma membranes. 
E)  a material found in plant cell walls.

Question 19

In what process do RNA molecules function?

Accepted Answer

A)  protein synthesis 
B)  DNA replication 
C)  fat metabolism 
D)  respiration 
E)  virus protection 
A)  protein synthesis 
B)  DNA replication 
C)  fat metabolism 
D)  respiration 
E)  virus protection

Question 20

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks.
-the two units that combine in various ways to form lipids

Accepted Answer

The answer of Classification.The following are basic building blocks of...

Exam 2: Molecules of Life

Which of the following inventions led to trans fats being marketed as a solid cooking fat?

For a given element,all atoms of that element have the same number of

Which molecule is INCORRECTLY matched with its component part?

The positively charged ion,potassium,and the negatively charged ion,fluoride,will form what kind of bond?

In which of the following biological systems have radioactive tracers been used?

Which of the following is true about the metabolism of trans fatty acids?

The nucleus of an atom contains

Glucose dissolves in water because it

Match the following letters to the number with which they best correspond. -forms of an element that differ in the number of neutrons their atoms carry.

Hydrogenated vegetable oil or trans fats are

Phosphorus Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s). -How many electrons are in the second electron shell of a phosphorus atom?

Protein misfolding causes

Which of the following organisms can more likely break down cellulose?

A nucleotide is constituted of

Which of the following statements is (are)TRUE about radioisotopes?

Which of the following substances is hydrophobic?

Carbon 14 radioisotopes decay into stable

Cellulose is

In what process do RNA molecules function?

Classification.The following are basic building blocks of macromolecules.Answer the questions with reference to those building blocks. -the two units that combine in various ways to form lipids

Invitation to Biology

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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