Activities Quiz
1.

This is an image of a _____. (Activity 16A)

question #1

bacterium
red blood cell
phage
moneran
protist


2.

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


3.

The radioactive isotope 32P labels the T2 phage's _____. (Activity 16A)

DNA
tail
base plate
protein coat
head


4.

Hershey and Chase used _____ to radioactively label the T2 phage's proteins. (Activity 16A)

35S
14C
222Ra
32P
92U


5.

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


6.

In the accompanying image, a nucleotide is indicated by the letter _____. (Activity 16B)

question #6

A
B
C
D
E


7.

Which of these is a difference between a DNA and an RNA molecule? (Activity 16B)

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.


8.

This is an image of a(n) _____. (Activity 16B)

question #8

amino acid
nucleic acid
thiol
nucleotide
none of the above


9.

The letter A indicates a _____. (Activity 16B)

question #9

phosphate group
nucleotide
nitrogenous base
sugar
none of the above


10.

A nitrogenous base is indicated by the letter _____. (Activity 16B)

question #10

A
B
C
D
E


11.

You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____. (Activity 16B)

question #11

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


12.

Which of these nitrogenous bases is found in DNA but not in RNA? (Activity 16B)

adenine
cytosine
guanine
thymine
uracil


13.

Which of these is(are) pyrimidines? (Activity 16B)

question #13

A and B
A, B, and C
B and C
B, C, and D
C, D, and E


14.

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'


15.

Nucleic acids are assembled in the _____ direction. (Activity 16B)

1' to 5'
2' to 3'
5' to 3'
4' to 5'
5' to 1'


16.

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


17.

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


18.

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


19.

The first step in the replication of DNA is catalyzed by _____. (Activity 16E), (Activity 16F)

helicase
DNA polymerase
ligase
primase
single-strand binding protein


20.

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


21.

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


22.

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


23.

Which of these is responsible for catalyzing the formation of an RNA primer? (Activity 16F)
question23

A
B
C
D
E


24.

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



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