WorksheetsQuizziz #12 (Due Sunday, 1/13 @ 11pm)
Total questions: 50
Worksheet time: 36mins
Name
Class
Date
1.
How do the leading, and the lagging strands differ?
a)
The leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction.
b)
The leading strand is synthesized at twice the rate of the lagging strand.
c)
The leading strand is synthesized in short fragments that are ultimately stitched together, whereas the lagging strand is synthesized continuously.
d)
The leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5? end.
2.
Suppose a double-stranded DNA molecule was shown to have 15% adenine bases. What would be the expected percentage of guanine bases in that molecule?
a)
15%
b)
35%
c)
85%
d)
Not enough information
3.
Consider the replication bubble diagrammed at the right. Which letters represent leading strands?
a)
W and X
b)
Y and Z
c)
W and Z
d)
X and Y
4.
Consider the replication bubble diagrammed at the right. Which letters represent leading strands?
a)
A
b)
B
c)
C
d)
D
5.
Which enyzme would be found only on the lagging strand?
a)
DNA polymerase
b)
Primase
c)
Ligase
d)
Topoisomerase
6.
In DNA , the amount of A is equal to the amount of
a)
C
b)
G
c)
T
d)
U
7.
Which enzyme is needed to start DNA replication?
a)
DNA Polymerase
b)
Topoisomerase
c)
Ligase
d)
Primase
8.
Which enzyme is not working correctly if new DNA bases are not added to the template strand?
a)
DNA Polymerase
b)
Topoisomerase
c)
Ligase
d)
Primase
9.
Which enzyme is responsible for proofreading the newly composed DNA strand?
a)
DNA Polymerase
b)
Topoisomerase
c)
Ligase
d)
Primase
10.
If you have phosphate in your sample organic compound, you could have a
a)
nucleotide
b)
protein
c)
sugar
d)
fatty acid
11.
Which of the following help(s) to hold the DNA strands apart while they are being replicated?
a)
RNA primase
b)
single–strand binding proteins
c)
DNA polymerase I
d)
DNA ligase
12.
What is meant by the description "antiparallel" regarding the strands that make up DNA?
a)
The twisting nature of DNA creates nonparallel strands.
b)
One strand is positively charged and the other is negatively charged.
c)
The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand.
d)
Base pairings create unequal spacing between the two DNA strands
13.
What is meant that DNA replication follows a “semi-conservative” model?
a)
After DNA replication, each strand contains one side that is a parental strand and the other side is a daughter strand.
b)
After DNA replication, one completed strand contains only parental DNA while the other contains only daughter DNA.
c)
None of these identify the “semi-conservative” model.
d)
After DNA replication, one completed strand contains a mixture of both parental DNA and daughter DNA dispersed throughout the strand.
14.
Which scientist(s) stated that DNA contains phosphorus while proteins contain sulfur?
a)
Meselson & Stahl
b)
Hershey & Chase
c)
Watson & Crick
d)
Franklin & Watkins
15.
What determines the nucleotide sequence of the newly synthesized strand during DNA replication?
a)
the particular DNA polymerase catalyzing the reaction
b)
the relative amounts of the four nucleoside triphosphates in the cell
c)
the nucleotide sequence of the template strand
d)
the primase used in the reaction e. the arrangement of histones in the sugar phosphate backbone
16.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
17.
A nucleotide includes...?
a)
pentose sugar
b)
nitrogenous base
c)
phosphate group
d)
all of the above
18.
In DNA, Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
19.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
20.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for making proteins
d)
because we eat it every day for energy
21.
Which 2 molecules forms the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
22.
Which shows the correct complementary base pairing for DNA?
a)
C-A, T-G
b)
A-G, C-T
c)
C-G, U-A
d)
T-A, G-C
23.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
24.
What is responsible for holding the two strands of the DNA double helix together?
a)
hydrogen bonds
b)
alleles
c)
London dispersion forces
d)
deoxyribose sugars
25.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
26.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
27.
What did Avery believe is responsible for transformation?
a)
DNA
b)
RNA
c)
Ribosomes
d)
Mitochondria
28.
What was the purpose of the Avery experiment?
a)
He wanted to be better than Griffith
b)
He wanted to test if RNA was the transforming principle
c)
He wanted to test if DNA was the transforming principle
d)
It was an accident
29.
What are bacteriophages
a)
Viruses
b)
Carbohydrates
c)
Protein
d)
Lysosomes
30.
How did Hershey & Chase “tag” the bacteriophages?
a)
Track DNA by radiation concentrations
b)
Infection
c)
Blending
d)
Centrifiguration
31.
what is a bacteriophage made out of
a)
Protein, RDNA
b)
Water, Oxygen
c)
Protein, DNA
d)
Protein, Lipid
32.
Which of the following is not a part of interphase?
a)
G2
b)
M
c)
G1
d)
S
33.
DNA is replicated during ______ of the cell cycle.
a)
G1
b)
S
c)
G2
d)
G0
34.
Which of the following shows the correct sequence of the cell cycle?
a)
Mitosis-> G1->S->G2->cytokinesis
b)
S->G1-> G2-> mitosis-> cytokinesis
c)
cytokinesis->mitosis->G1->S->G2
d)
G1->S->G2->mitosis->cytokinesis
35.
The phase of mitosis in which the sister chromatids separate from each other
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
36.
In which phase of mitosis do the sister chromatids line up on the equator of the cell?
a)
Prophase
b)
Metaphase
c)
Anaphase
d)
Telophase
37.
Why do cells go through cell division
a)
Growth
b)
Reproduction
c)
Repair
d)
All of the above
38.
Structure (b) is a ____.
a)
chromosome
b)
chromatid
c)
centromere
39.
The process by which the nuclear material is divided equally between two new cells
a)
mitosis
b)
cancer
c)
spindle
d)
centromere
40.
Chiasmata are most closely related to which of the following?
a)
crossing over
b)
fertilization
c)
cytokinesis
d)
mitosis
41.
If a stem cell has 24 chromosomes, how many will it have at the end of meiosis?
a)
24
b)
12
c)
6
d)
the number varies per species
42.
When does crossing over occur?
a)
Interphase
b)
Prophase 1
c)
Prophase 2
d)
Metaphase 1
43.
Trisomy is a genetic disorder that ________
a)
has three sets of chromosomes
b)
has three copies of a particular chromosome
c)
that is curable
d)
none of the above
44.
Meiosis results in ______.
a)
4 genetically distinct haploid gametes
b)
2 genetically distinct cells
c)
2 genetically identical cells
d)
4 genetically identical cells
45.
The purpose of meiosis is to form ________ cells.
a)
body
b)
sex
c)
somatic
d)
brain
46.
Crossing over helps promote
a)
male genotype
b)
genetic variation
c)
DNA replication
d)
mitosis
47.
At fertilization the male and female sex cells will provide...
a)
Double of their chromosomes each
b)
One/third of their chromosomes each
c)
All of their chromosomes each
d)
Half of their chromosomes each
48.
The two ways to increase genetic variation during meiosis are crossing over and _____
a)
Synapsis
b)
Tetrad
c)
Independent assortment
d)
Gameiosis
49.
During meiosis I, what happens?
a)
Sister chromatids are split
b)
Homologous chromosomes are split
c)
Four cells are created
d)
None of the other choices are correct
50.
Human eggs and sperm are _____, and each has ____ chromosomes.
a)
diploid, 23
b)
diploid, 46
c)
haploid, 23
d)
haploid, 46
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