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This is an image of a _____. (Activity 16A) 
|
| bacterium |
| red blood cell |
| phage |
| moneran |
| protist |
|
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|
Who demonstrated that DNA is the genetic material of the T2 phage? (Activity 16A)
|
| Franklin |
| Hershey and Chase |
| Meselson and Stahl |
| Watson and Crick |
| Darwin and Wallace |
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The radioactive isotope 32P labels the T2 phage's _____. (Activity 16A)
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| DNA |
| tail |
| base plate |
| protein coat |
| head |
|
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Hershey and Chase used _____ to radioactively label the T2 phage's proteins. (Activity 16A)
|
| 35S |
| 14C |
| 222Ra |
| 32P |
| 92U |
|
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|
After allowing phages grown with bacteria in a medium that contained 32P and 35S,
Hershey and Chase used a centrifuge to separate the phage ghosts from the
infected cell. They then examined the infected cells and found that they
contained _____, which demonstrated that _____ is the phage's genetic material.
(Activity 16A)
|
| labeled protein ... DNA |
| labeled protein .... protein |
| labeled DNA ... labeled protein |
| labeled DNA .... protein |
| labeled DNA ... DNA |
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In the accompanying image, a nucleotide is indicated by the letter _____. (Activity 16B) 
|
| A |
| B |
| C |
| D |
| E |
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|
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Which of these is a difference between a DNA and an RNA molecule? (Activity 16B)
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| DNA contains uracil, whereas RNA contains thymine. |
| DNA is a polymer composed of nucleotides, whereas RNA is a polymer composed of nucleic acids. |
| DNA is double-stranded, whereas RNA is single-stranded. |
| DNA contains five-carbon sugars, whereas RNA contains six-carbon sugars. |
| DNA contains nitrogenous bases, whereas RNA contains phosphate groups. |
|
|
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This is an image of a(n) _____. (Activity 16B) 
|
| amino acid |
| nucleic acid |
| thiol |
| nucleotide |
| none of the above |
|
|
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The letter A indicates a _____. (Activity 16B) 
|
| phosphate group |
| nucleotide |
| nitrogenous base |
| sugar |
| none of the above |
|
|
|
A nitrogenous base is indicated by the letter _____. (Activity 16B) 
|
| A |
| B |
| C |
| D |
| E |
|
|
|
You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____. (Activity 16B) 
|
| thymine nitrogenous base, not a uracil nitrogenous base |
| sugar with two, and not three, oxygen atoms |
| double-stranded molecule, not a single-stranded molecule |
| phosphate group, not a uracil |
| uracil nitrogenous base, not a thymine nitrogenous base |
|
|
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Which of these nitrogenous bases is found in DNA but not in RNA? (Activity 16B)
|
| adenine |
| cytosine |
| guanine |
| thymine |
| uracil |
|
|
|
Which of these is(are) pyrimidines? (Activity 16B) 
|
| A and B |
| A, B, and C |
| B and C |
| B, C, and D |
| C, D, and E |
|
|
|
In
a nucleotide, the nitrogenous base is attached to the sugar's _____ carbon
and the phosphate group is attached to the sugar's _____ carbon. (Activity 16B)
|
| 1' ... 2' |
| 1' ... 5' |
| 2' ... 3' |
| 1' ... 3' |
| 2' ... 1' |
|
|
|
Nucleic acids are assembled in the _____ direction. (Activity 16B)
|
| 1' to 5' |
| 2' to 3' |
| 5' to 3' |
| 4' to 5' |
| 5' to 1' |
|
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In
a DNA double helix an adenine of one strand always pairs with a(n) _____
of the complementary strand, and a guanine of one strand always pairs with
a(n) _____ of the complementary strand. (Activity 16B), (Activity 16C), (Activity 16E)
|
| guanine ... adenine |
| cytosine ... uracil |
| cytosine ... thymine |
| thymine ... cytosine |
| uracil ... cytosine |
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Short segments of newly synthesized DNA are joined into a continuous strand by _____. (Activity 16D), (Activity 16F)
|
| helicase |
| DNA polymerase |
| ligase |
| primase |
| single-strand binding protein |
|
|
|
After DNA replication is completed, _____. (Activity 16D), (Activity 16E), (Activity 16F)
|
| each new DNA double helix consists of one old DNA strand and one new DNA strand |
| each new DNA double helix consists of two new strands |
| one DNA double helix consists of two old strands and one DNA double helix consists of two new strands |
| each of the four DNA strands consists of some old strand parts and some new strand parts |
| there are four double helices |
|
|
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The first step in the replication of DNA is catalyzed by _____. (Activity 16E), (Activity 16F)
|
| helicase |
| DNA polymerase |
| ligase |
| primase |
| single-strand binding protein |
|
|
|
The action of helicase creates _____. (Activity 16D), (Activity 16E), (Activity 16F)
|
| primers and DNA fragments |
| primers and replication bubbles |
| DNA fragments and replication forks |
| replication forks and replication bubbles |
| DNA fragments and replication bubbles |
|
|
|
Why is the new DNA strand complementary to the 3' to 5' strands assembled in short segments? (Activity 16D), (Activity 16E), (Activity 16F)
|
| the replication forks block the formation of longer strands |
| DNA polymerase can assemble DNA only in the 3' to 5' direction |
| DNA polymerase can assemble DNA only in the 5' to 3' direction |
| it is more efficient than assembling complete new strands |
| only short DNA sequences can extend off the RNA primers |
|
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The synthesis of a new strand begins with the synthesis of a(n) _____. (Activity 16E), (Activity 16F)
|
| single-strand binding protein |
| Okazaki fragment |
| poly(A) tail |
| short pieces of DNA |
| RNA primer complementary to a preexisting DNA strand |
|
|
|
Which of these is responsible for catalyzing the formation of an RNA primer? (Activity 16F)
|
| A |
| B |
| C |
| D |
| E |
|
|
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An old DNA strand is used as a _____ for the assembly of a new DNA strand. (Activity 16D), (Activity 16E), (Activity 16F)
|
| complement |
| primer |
| template |
| source of nucleotides |
| model |
