The size of a molecule is on the order of _________, and the size of an average cell is on the order of _______.

A. nanometer , micrometer 

B. nanometer, millimeter

C. micrometer, millimeter

D. picometer, millimeter

E. micrometer, nanometer

A. nanometer, micrometer

Which of these statements is incorrect?

A. 1 meter = 10^-3 millimeters

B. 1 meter = 10^-6 micrometers

C. 1 meter = 10^-9 nanometers

D. All of the above are correct

E. None of the above are correct

E. None of the above are correct

What is correct order of the flow of genetic information?

-translation

-RNA

-protein

-DNA

-transcription

DNA-transcription-RNA-translation-protein

Cells in a multicellular organism contain (nearly) identical copies of DNA, but turn on different sets of genes according to their developmental history and signals from outside the cell.

A. True

B. False

A. True

The light microscope allows us to resolve details as small as _____, and this level of detail is limited by _______.

A. 200 micrometers, the quality of the lenses

B. 200 micrometers, the wavelike nature of light

C. 200 nanometers, the quality of the lenses

D. 200 nm, the wavelike nature of light

D. 200 nanometers, the wavelike nature of light

Fluorescent dyes absorb light at one wavelength and emit at another, longer wavelength.

A. True

B. False

A. True

A confocal microscope differs from a typical fluorescence microscope in that:

A. Confocal microscopy scatters light off the surface of the specimen giving striking 3-D images of the objects surface.

B. Confocal microscopy requires the samples be stained with fluorescent dyes.

C. Confocal microscopy is used to focus at different depths within the specimen allows a 3-D fluorescent image to be constructed

D. B & C

E. All of the above

C. Confocal microscopy is used to focus at different depths within the specimen allows a 3-D fluorescent image to be constructed.

Which of the following is true regarding transmission electron microscopy (TEM)?

A. TEM is in principle similar to a light microscope, but uses a beam of electrons rather than a beam of light

B. TEM samples must be very thin

C. Contrast is usually introduced by staining with electron-dense heavy metals

D. TEM can resolve details as small as about 2 micrometers

E. All of the above are true

D. TEM can resolve details as small as about 2 micrometers

Which of the following is NOT true regarding scanning electron microscopy (SEM)?

A. SEm scatters electrons on the surface of the samples

B. Electrons are focused on the sample surface using electromagnetic coils that act as lenses

C. SEM samples are coated with a very thin film of a heavy metal

D. SEM is used to look at surface details with a resolution of ~3nm to 20nm

E. All of the above are true

E. All of the above are true

Tissues are often chemically fixed and cut into thin slices, or sections, for certain types of microscopy. This is done because:

A. Most tissues are not small enough or transparent enough

B. Most tissues require fixing for removal

C. Fluorescent dyes require fixation for microscopy

D. A & C

E. All of the above

A. Most tissues are not small enough or transparent enough

What statement is NOT true about procaryotes?

A. Procaryotes use DNA to store their genetic info

B. Procaryotes store their genetic info in a nucleus

C. Procaryotes vary widely in shape and size

D. Procaryotes are mostly single-celled organisms, but some are multicellular

E. All of the above are true

B. Procaryotes store their genetic info in a nucleus

Bacteria can duplicate every T minutes.  Assuming uabated growth with a doubling time of exactly T minutes and 50 bacteria at time t=0, which equation correctly models the number bacteria as a function of time t in minutes?

A. T*50^(t/T)

B. T*50^(t)

C. 50*2^(t/T)

D. 50*2^(t)

E. 50^(t/T)

F. 50^(t)

C. 50*2^(t/T)

Which of the following are prokaryotes?

A. Plants and animals

B. Animals and archaea

C. Archaea and bacteria

D. Bacteria and fungi

E. None of the above

C. Archaea and bacteria

The DNA of a bacterial cell is found in the cytosol

A. True

B. False

A. True

All of the DNA of a cukaryotic cell is contained within the nucleus

A. True

B. False

B. False

What role is NOT performed by the cytoskeleton?

A. Pulling duplicated chromososmes to opposite poles in dividing cells

B. Transporting organelles and molecules from one place to another in the cytoplasm

C. Generating chemical energy

D. Controlling cell shape and movement

All of the above

C. Generating chemical energy

Which of the following is NOT a model organism?

A. Escherichia coli

B. Arabidopsis thaliana

C. Drosophilia melanogaster

D. Schizosaccharomyces cerevisae

E. Caenorhabditis elegans

F.  All of the above are model organisms

F.  All of the above are model organisms

Mammals possess the largest genome of any known species

A. True

B. False

B. False