Question 1

A section of DNA that does not correspond to a known protein is referred to as

Accepted Answer

A)  redundant 
B)  recombinant 
C)  unencoding 
D)  noncoding 
A)  redundant 
B)  recombinant 
C)  unencoding 
D)  noncoding

Question 2

When humans get hot, they sweat in order to reduce their body temperature. Which of the key properties of life is this an example of?

Accepted Answer

A)  growth and development 
B)  reproduction 
C)  response to environment 
D)  order 
A)  growth and development 
B)  reproduction 
C)  response to environment 
D)  order

Question 3

Recent studies of the biochemistry of cells have shown that prokaryotes are

Accepted Answer

A)  more biochemically related to eukaryotes than previously thought 
B)  biochemically identical to eukaryotes in every way 
C)  a biochemically distinct group unrelated to eukaryotes in any way 
D)  organisms that were transported to Earth from Mars in meteroites 
A)  more biochemically related to eukaryotes than previously thought 
B)  biochemically identical to eukaryotes in every way 
C)  a biochemically distinct group unrelated to eukaryotes in any way 
D)  organisms that were transported to Earth from Mars in meteroites

Question 4

Species are groups of organisms

Accepted Answer

A)  with a common ancestor 
B)  that are genetically distinct 
C)  that look similar 
D)  that are capable of interbreeding with one another 
A)  with a common ancestor 
B)  that are genetically distinct 
C)  that look similar 
D)  that are capable of interbreeding with one another

Question 5

What do plant cells have that animal cells do not?

Accepted Answer

A)  a nucleus 
B)  cell walls 
C)  nucleic acids 
D)  organelles 
A)  a nucleus 
B)  cell walls 
C)  nucleic acids 
D)  organelles

Question 6

Of the many possible nucleotides, the DNA used in living organisms on Earth uses how many?

Accepted Answer

A)  20 
B)  4 
C)  5 
D)  23 
A)  20 
B)  4 
C)  5 
D)  23

Question 7

The basic biological structures of life on Earth are called

Accepted Answer

A)  cells 
B)  bacteria 
C)  molecules 
D)  atoms 
A)  cells 
B)  bacteria 
C)  molecules 
D)  atoms

Question 8

Which kinds of mutation tend to have the most dramatic effects on protein structure?

Accepted Answer

A)  all mutations are equally dramatic 
B)  those which change a single base that do not result in a change in the amino acid 
C)  those which change a single base that result in a single amino acid being changed 
D)  those that add or delete a base within a gene 
A)  all mutations are equally dramatic 
B)  those which change a single base that do not result in a change in the amino acid 
C)  those which change a single base that result in a single amino acid being changed 
D)  those that add or delete a base within a gene

Question 9

Why might we think that silicon would be an obvious alternative to carbon as a building block for biological molecules?

Accepted Answer

A)  it forms the basis of some life forms on Earth 
B)  it has a similar abundance on Earth to carbon 
C)  it forms complex molecules like carbon 
D)  it has a similar electronic structure to carbon, forming a maximum of four bonds and, hence, should have a similar chemistry 
A)  it forms the basis of some life forms on Earth 
B)  it has a similar abundance on Earth to carbon 
C)  it forms complex molecules like carbon 
D)  it has a similar electronic structure to carbon, forming a maximum of four bonds and, hence, should have a similar chemistry

Question 10

Killer Whales are scientifically classified as Orcinus orca. This means that they members of the

Accepted Answer

A)  genus Orcinus and the family orca 
B)  species Orcinus and the genus orca 
C)  genus Orcinus and the species orca 
D)  order Orcinus and the species orca 
A)  genus Orcinus and the family orca 
B)  species Orcinus and the genus orca 
C)  genus Orcinus and the species orca 
D)  order Orcinus and the species orca

A section of DNA that does not correspond to a known protein is referred to as

When humans get hot, they sweat in order to reduce their body temperature. Which of the key properties of life is this an example of?

Recent studies of the biochemistry of cells have shown that prokaryotes are

Species are groups of organisms

What do plant cells have that animal cells do not?

Of the many possible nucleotides, the DNA used in living organisms on Earth uses how many?

The basic biological structures of life on Earth are called

Which kinds of mutation tend to have the most dramatic effects on protein structure?

Why might we think that silicon would be an obvious alternative to carbon as a building block for biological molecules?

Killer Whales are scientifically classified as Orcinus orca. This means that they members of the

The Science of Life in the Universe

The Universal Context of Life

The Habitability of Earth

The Origin and Evolution of Life on Earth

Searching for Life in Our Solar System

Mars

Life on Jovian Moons

The Nature and Evolution of Habitability

Habitability Outside the Solar System

The Search for Extraterrestrial Intelligence

Interstellar Travel and the Fermi Paradox

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Exam 5: The Nature of Life on Earth

A section of DNA that does not correspond to a known protein is referred to as

When humans get hot, they sweat in order to reduce their body temperature. Which of the key properties of life is this an example of?

Recent studies of the biochemistry of cells have shown that prokaryotes are

Species are groups of organisms

What do plant cells have that animal cells do not?

Of the many possible nucleotides, the DNA used in living organisms on Earth uses how many?

The basic biological structures of life on Earth are called

Which kinds of mutation tend to have the most dramatic effects on protein structure?

Why might we think that silicon would be an obvious alternative to carbon as a building block for biological molecules?

Killer Whales are scientifically classified as Orcinus orca. This means that they members of the

The Science of Life in the Universe

The Universal Context of Life

The Habitability of Earth

The Origin and Evolution of Life on Earth

Searching for Life in Our Solar System

Mars

Life on Jovian Moons

The Nature and Evolution of Habitability

Habitability Outside the Solar System

The Search for Extraterrestrial Intelligence

Interstellar Travel and the Fermi Paradox

Filters