Question 1

Which approach provides a good model for studying the effect of a gene on the development of mammals?

Accepted Answer

Use of genetically engineered mice in which a mutant gene has replaced the wild type gene

Question 2

The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.

Accepted Answer

A)   ribosomes
B)   oxidative phosphorylation
C)   RNA molecules
D)   a nucleus D

Question 3

What is the theoretical diffraction limit of resolution of a light microscope used to look at a sample through oil?

Accepted Answer

A)   0.22 μm
B)   0.2 nm
C)   1 mm
D)   0.305 μm A

Question 4

The amoeba _______ exists as a unicellular organism in abundant nutrient conditions and forms multicellular fruiting bodies in starvation conditions.

Accepted Answer

The answer of The amoeba _______ exists as a unicellular...

Question 5

Which of these organisms is not a unicellular eukaryote?

Accepted Answer

A)   Saccharomyces cerevisiae
B)   Paramecium
C)   Methanococcus
D)   Chlamydomonas

Question 6

Which technique would be best for studying whether cells from different tissues of the body have different nutritional requirements?

Accepted Answer

The answer of Which technique would be best for studying...

Question 7

RNA, unlike DNA, is capable of _______ a number of different chemical reactions.

Accepted Answer

The answer of RNA, unlike DNA, is capable of _______...

Question 8

A yeast cell divides in culture about every

Accepted Answer

A)   20 minutes.
B)   40 minutes.
C)   2 hours.
D)   12 hours.

Question 9

All implementations of the light microscope are absolutely limited in their resolution by the diffraction properties of the illuminating light.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following cell components will be concentrated in the first pellet produced by differential centrifugation?

Accepted Answer

A)   Mitochondria
B)   Nuclei
C)   Endoplasmic reticulum
D)   The cytosol

Question 11

Viruses are useful model systems for studying

Accepted Answer

A)   tooth development.
B)   cell signaling.
C)   DNA replication.
D)   regulation of cell cycle control.

Question 12

Because the wavelength of electrons is 100,000 times shorter than the wavelength of visible light, the resolution of the electron microscope is 100,000 times better than the resolution of the light microscope.

Accepted Answer

A) True 
 B)False

Question 13

The human body is composed of more than _______ different types of cells.

Accepted Answer

A)   100
B)   200
C)   400
D)   2,000

Question 14

The method by which cell components are separated by centrifugation at progressively higher speeds is called _______ centrifugation.

Accepted Answer

A)   differential
B)   velocity
C)   density-gradient
D)   equilibrium

Question 15

How good an indicator is DNA content of the cellular complexity of an organism? Give examples to explain your answer.

Accepted Answer

The answer of How good an indicator is DNA content...

Question 16

Viruses are complexes of nucleic acid and protein that can replicate on their own.

Accepted Answer

A) True 
 B)False

Question 17

Diffraction is considered to be a fundamental principle that limits the resolution of a light microscope. Super-resolution light microscopes are indeed light microscopes. In achieving higher resolution than a conventional light microscope, does a super-resolution light microscope prove the diffraction limit to be "false"? If not, how does a super-resolution light microscope achieve higher resolution?

Accepted Answer

The answer of Diffraction is considered to be a fundamental...

Question 18

The common source of electrons in the conversion of CO₂ into organic molecules in photosynthesis is _______.

Accepted Answer

The answer of The common source of electrons in the...

Question 19

Cytoplasmic organelles are

Accepted Answer

A)   absent in prokaryotic cells and present in eukaryotic cells.
B)   present in both prokaryotic and eukaryotic cells.
C)   present in prokaryotic cells and absent in eukaryotic cells.
D)   absent in both prokaryotic and eukaryotic cells.

Question 20

The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.

Accepted Answer

A)   ribosomes
B)   oxidative phosphorylation
C)   DNA molecules
D)   a nucleus

Exam 1: An Overview of Cells and Cell Research

Which approach provides a good model for studying the effect of a gene on the development of mammals?

The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.

What is the theoretical diffraction limit of resolution of a light microscope used to look at a sample through oil?

The amoeba _______ exists as a unicellular organism in abundant nutrient conditions and forms multicellular fruiting bodies in starvation conditions.

Which of these organisms is not a unicellular eukaryote?

Which technique would be best for studying whether cells from different tissues of the body have different nutritional requirements?

RNA, unlike DNA, is capable of _______ a number of different chemical reactions.

A yeast cell divides in culture about every

All implementations of the light microscope are absolutely limited in their resolution by the diffraction properties of the illuminating light.

Which of the following cell components will be concentrated in the first pellet produced by differential centrifugation?

Viruses are useful model systems for studying

Because the wavelength of electrons is 100,000 times shorter than the wavelength of visible light, the resolution of the electron microscope is 100,000 times better than the resolution of the light microscope.

The human body is composed of more than _______ different types of cells.

The method by which cell components are separated by centrifugation at progressively higher speeds is called _______ centrifugation.

How good an indicator is DNA content of the cellular complexity of an organism? Give examples to explain your answer.

Viruses are complexes of nucleic acid and protein that can replicate on their own.

The common source of electrons in the conversion of CO2 into organic molecules in photosynthesis is _______.

Cytoplasmic organelles are

The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.

The common source of electrons in the conversion of CO₂ into organic molecules in photosynthesis is _______.