Question 1

The mass of the protons and neutrons added is the

Accepted Answer

A)  atomic sum. 
B)  atomic number. 
C)  atomic weight. 
D)  atomic charge. 
E)  atomic coefficient. 
A)  atomic sum. 
B)  atomic number. 
C)  atomic weight. 
D)  atomic charge. 
E)  atomic coefficient.

Question 2

A base is a compound that releases hydrogen ions when dissolved in water.

Accepted Answer

A) True 
 B)False

Question 3

Which type of chemical bond involves the transfer of electrons?

Accepted Answer

A)  ionic 
B)  covalent 
C)  hydrogen 
D)  both ionic and covalent are correct 
E)  both ionic and hydrogen are correct 
A)  ionic 
B)  covalent 
C)  hydrogen 
D)  both ionic and covalent are correct 
E)  both ionic and hydrogen are correct

Question 4

Classes of proteins called ________ function as organic catalysts for chemical reactions in cells.

Accepted Answer

A)  peptides 
B)  enzymes 
C)  thermal agents 
D)  disaccharides 
E)  hormones 
A)  peptides 
B)  enzymes 
C)  thermal agents 
D)  disaccharides 
E)  hormones

Question 5

Compounds that consist of carbon, hydrogen, and oxygen in a ratio of CH2O are ________.

Accepted Answer

A)  lipids 
B)  proteins 
C)  nucleic acids 
D)  enzymes 
E)  carbohydrates 
A)  lipids 
B)  proteins 
C)  nucleic acids 
D)  enzymes 
E)  carbohydrates

Question 6

Unfilled positions within an electron orbital tend to make the atom

Accepted Answer

A)  unreactive. 
B)  neutral. 
C)  less reactive. 
D)  more reactive. 
E)  stable. 
A)  unreactive. 
B)  neutral. 
C)  less reactive. 
D)  more reactive. 
E)  stable.

Question 7

Two different atoms, each with 7 electrons in their outmost energy shell, may share two pairs of electrons; that is, a double bond is formed between the two atoms.

Accepted Answer

A) True 
 B)False

Question 8

Structural and functional molecules making up a cell have a skeleton of ________.

Accepted Answer

A)  carbon, hydrogen, and oxygen 
B)  nitrogen and oxygen 
C)  silicon and oxygen 
D)  carbon and oxygen 
E)  calcium phosphate 
A)  carbon, hydrogen, and oxygen 
B)  nitrogen and oxygen 
C)  silicon and oxygen 
D)  carbon and oxygen 
E)  calcium phosphate

Question 9

The volume of space in which a given electron occurs 90% of the time is called

Accepted Answer

A)  an orbital. 
B)  a nucleus. 
C)  an atom. 
D)  a molecule. 
E)  a bond. 
A)  an orbital. 
B)  a nucleus. 
C)  an atom. 
D)  a molecule. 
E)  a bond.

Question 10

If a lipid has its fatty acids attached to a glycerol molecule, it is called a wax.

Accepted Answer

A) True 
 B)False

Question 11

An ion is neither positively nor negatively charged.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is NOT an attribute of ALL living organisms?

Accepted Answer

A)  metabolism 
B)  photosynthesis 
C)  reproduction 
D)  response to stimuli 
E)  adaptation to the environment 
A)  metabolism 
B)  photosynthesis 
C)  reproduction 
D)  response to stimuli 
E)  adaptation to the environment

Question 13

Assimilation is the conversion of raw materials into protoplasm and other cell substances.

Accepted Answer

A) True 
 B)False

Question 14

At present the number of elements naturally occurring on earth is ________.

Accepted Answer

A)  less than 90 
B)  92 
C)  98 
D)  104 
E)  more than 105 
A)  less than 90 
B)  92 
C)  98 
D)  104 
E)  more than 105

Question 15

________ polymer serve as the genetic memory in living cells.

Accepted Answer

A)  Carbohydrate 
B)  Nucleic acid 
C)  Protein 
D)  Lipid 
E)  Two or more of these 
A)  Carbohydrate 
B)  Nucleic acid 
C)  Protein 
D)  Lipid 
E)  Two or more of these

Question 16

Reproduction in living organisms results in ________.

Accepted Answer

A)  new individuals of the same species 
B)  new individuals that are always genetically identical to the parents 
C)  new individuals that are never genetically identical to the parents 
D)  overpopulation of the community by that species 
E)  loss of genetic variability in the population 
A)  new individuals of the same species 
B)  new individuals that are always genetically identical to the parents 
C)  new individuals that are never genetically identical to the parents 
D)  overpopulation of the community by that species 
E)  loss of genetic variability in the population

Question 17

Electrons are essentially

Accepted Answer

A)  positive electric charges. 
B)  negative electric charges. 
C)  unstable isotopes. 
D)  uncharged particles. 
E)  atomic particles that are bonded together. 
A)  positive electric charges. 
B)  negative electric charges. 
C)  unstable isotopes. 
D)  uncharged particles. 
E)  atomic particles that are bonded together.

Question 18

The number of naturally occurring amino acids is ________.

Accepted Answer

A)  20 
B)  600 
C)  less than 10 
D)  35 
E)  64 
A)  20 
B)  600 
C)  less than 10 
D)  35 
E)  64

Question 19

The atomic number of an element is based on

Accepted Answer

A)  the number of electrons associated with a single atom. 
B)  the number of neutrons in the nucleus of an atom. 
C)  the number of isotopes associated with it. 
D)  the number of protons present in a single atom. 
E)  its atomic mass. 
A)  the number of electrons associated with a single atom. 
B)  the number of neutrons in the nucleus of an atom. 
C)  the number of isotopes associated with it. 
D)  the number of protons present in a single atom. 
E)  its atomic mass.

Question 20

The element with the lowest atomic number and/or mass is

Accepted Answer

A)  oxygen. 
B)  hydrogen. 
C)  boron. 
D)  nitrogen. 
E)  carbon. 
A)  oxygen. 
B)  hydrogen. 
C)  boron. 
D)  nitrogen. 
E)  carbon.

Exam 2: The Nature of Life

The mass of the protons and neutrons added is the

A base is a compound that releases hydrogen ions when dissolved in water.

Which type of chemical bond involves the transfer of electrons?

Classes of proteins called ________ function as organic catalysts for chemical reactions in cells.

Compounds that consist of carbon, hydrogen, and oxygen in a ratio of CH2O are ________.

Unfilled positions within an electron orbital tend to make the atom

Two different atoms, each with 7 electrons in their outmost energy shell, may share two pairs of electrons; that is, a double bond is formed between the two atoms.

Structural and functional molecules making up a cell have a skeleton of ________.

The volume of space in which a given electron occurs 90% of the time is called

If a lipid has its fatty acids attached to a glycerol molecule, it is called a wax.

An ion is neither positively nor negatively charged.

Which of the following is NOT an attribute of ALL living organisms?

Assimilation is the conversion of raw materials into protoplasm and other cell substances.

At present the number of elements naturally occurring on earth is ________.

________ polymer serve as the genetic memory in living cells.

Reproduction in living organisms results in ________.

Electrons are essentially

The number of naturally occurring amino acids is ________.

The atomic number of an element is based on

The element with the lowest atomic number and/or mass is

What Is Plant Biology

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdom Bacteria, Domain Kingdom Archaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants - Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

Filters

Compounds that consist of carbon, hydrogen, and oxygen in a ratio of CH₂O are ________.