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WorksheetsBiology-Ch 12
Total questions: 102
Worksheet time: 1hrs 9mins
Name
Class
Date
1.
Which sequence of complementary 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
2.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains uracil
3.
Which of the following monomers are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
4.
In a molecule of double-stranded DNA, the amount of adenine present is always equal to the amount of _________.
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
5.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
6.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
7.
The two strands of nitrogenous bases in DNA are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
8.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
d)
Protein Synthesis
9.
What are the three components of a nucleotide?
a)
sugar, hydrogen, nitrogen base
b)
sugar, oxygen, nitrogen base
c)
sugar, phosphate, nitrogen base
d)
sugar, phosphate, protein
10.
Who was given credit for determining the shape of DNA?
a)
Avery
b)
Watson and Darwin
c)
Watson and Crick
d)
Franklin and Crick
11.
Identify #2.
a)
nitrogen base
b)
phosphate group
c)
deoxyribose sugar
d)
nucleotide
12.
What process is shown in the diagram?
a)
replication
b)
transcription
c)
mitosis
d)
translation
13.
X outlines a(n) ___________.
a)
amino acid
b)
nitrogen base
c)
nucleotide
d)
nitrogen base pair
14.
The molecule pictured is a monomer of _______.
a)
RNA
b)
DNA
c)
a carbohydrate
d)
a protein
15.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
16.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
17.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
18.
What are the 4 nitrogen bases?
a)
adenine, thymine, cytoplasm, and guanine
b)
adenine, thymine cytosine, and guanine
c)
adenine, thymine, cytosine, and gylcerol
d)
adenine, thymine, cytosine, and glucose
19.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
20.
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
21.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
22.
Replicate the following strand of DNA:
AATCATGGA
AATCATGGA
a)
AATCATGGA
b)
TTAGTACCT
c)
UUAGUACCU
d)
GGATAUCUA
23.
How many chromosomes do human cells have?
a)
46
b)
23
c)
2
d)
44
24.
The shape of the DNA molecule is a double __________________?
a)
"S"
b)
helix
c)
rope
d)
curve
25.
order of replication
a)
3, 2, 1, 4
b)
2, 1, 4, 3
c)
2, 3, 1, 4
d)
3, 4, 1, 2
26.
What are the following rules called?
1 - The amount of A, T, G, and C varies from species to species.
2 - In each species, the amount of A = T and G = C.
1 - The amount of A, T, G, and C varies from species to species.
2 - In each species, the amount of A = T and G = C.
a)
Rosalind's Rules
b)
Watson's Rules
c)
Crick's Rules
d)
Chargaff's Rules
27.
Who was responsible for determining the structure of DNA?
a)
Watson and Crick
b)
Chargaff
c)
Rosalind Franklin
d)
All of the above
28.
Where does protein synthesis take place?
a)
Ligase
b)
Ribosomes
c)
Codon
d)
Endoplasmic Reticulum
29.
In RNA, Uracil pairs with ______.
a)
cytosine
b)
adenine
c)
guanine
d)
thymine
30.
DNA holds the code for
a)
lipids
b)
carbohydrates
c)
protein
d)
sugar
31.
How many amino acids are coded for by this sequence of nucleotides:
ATG GGA ACT CCA
ATG GGA ACT CCA
a)
4
b)
2
c)
6
d)
12
32.
Contains the bases adenine, uracil, cytosine and guanine
a)
DNA
b)
RNA
c)
Both
33.
How many codons are needed to specify for five amino acids?
a)
3
b)
5
c)
15
d)
30
34.
If the percentage of DNA is made of 30% Thymine, what is the correct percentage of Guanine?
a)
30
b)
15
c)
20
d)
60
35.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
36.
DNA replication results in two DNA molecules,
a)
each one with two original strands
b)
each one with two new strands
c)
each one with one new strand and one original strand
d)
one with two new strands and the other with two original strands
37.
A scientist observes a base sequence of AGCTAGCTAGCT. Which of the following would be the complimentary strand?
a)
TGCATGCATGCA
b)
TCGATCGATCGA
c)
TAGCTAGCTAGC
d)
TTAAGGCCTTCC
38.
After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?
a)
22%
b)
25%
c)
28%
d)
56%
39.
If you are missing or have an extra base at the end of your mutated DNA . What type of mutation occurred?
a)
Substitution
b)
Frameshift
c)
Duplication
d)
Insertion
40.
Which of the following would result in a frameshift mutation?
a)
Insertions only
b)
Substitution only
c)
Deletion only
d)
Insertions and Deletions
41.
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
a)
Substitution
b)
Deletion
c)
Insertion
d)
Inversion
42.
mRNA is read in chunks of three, called...
a)
quadralets
b)
anticodons
c)
codons
d)
capsids
43.
What is a Gene?
a)
A segment of RNA that encodes for a protein
b)
A chromosome
c)
A segment of DNA that encodes for a protein
d)
Your genome
44.
Normal-
GAG-CTC-GAC-AGA
Mutant
GAG CTC-CAC-AGA
GAG-CTC-GAC-AGA
Mutant
GAG CTC-CAC-AGA
a)
no mutation
b)
substitution
c)
insertion
d)
deletion
45.
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
T-G-A-C-C-A
T-G-A-G-C-A
a)
Substitution
b)
Deletion
c)
Insertion
d)
Frameshift
46.
Original: ATC CAT
Mutation: ATC GCAT
What mutation occurred?
Mutation: ATC GCAT
What mutation occurred?
a)
deletion
b)
insertion
c)
silent
d)
transverse
47.
Are all mutations bad?
a)
Yes
b)
No
48.
Where so new strands of DNA grow from?
a)
Salad fork
b)
Fish fork
c)
Replication Fork
d)
Pitch Fork
49.
This enzyme adds nucleotide after the RNA Primer is attached.
a)
Polymerase
b)
Endonuclease
c)
GTPase
d)
Endoribonuclease
50.
DNA nucleotides are synthesized from
a)
3' to 3'
b)
5' to 3'
c)
9 to 5
d)
3' to 5'
51.
What enzyme is used to join the Okazaki Fragments?
a)
Leucoanthocyanidin reductase
b)
Liagse
c)
Laccase
d)
Lysozyme
52.
What are the two segments of the separated DNA called?
a)
Leading and Lagging
b)
Leading and Ligase
c)
Laughing and Lagging
d)
Looking and Listening
53.
What is the complementary strand of:
3' ACCGTCGAT 5'
a)
5' TGGCAGCTA 3'
b)
3' TGGCAGCTA 5'
c)
5' UGGCAGCUA 3'
d)
3' UGGCAGCUA 5'
54.
Which of the following carries amino acids to the site of protein synthesis?
a)
mRNA
b)
rRNA
c)
tRNA
d)
nRNA
55.
Which of the following must happen first in order for DNA replication to occur?
a)
DNA polymerase binds to the leading strand
b)
DNA is unwound
c)
Hydrogen bonds form between bases
d)
chromosomes condense
56.
Okazaki fragments form on the:
a)
lagging strand
b)
leading strand
c)
base-pairs
d)
5' end
57.
Which of the following is required for DNA replication to occur?
a)
DNA helicase
b)
DNA ligase
c)
DNA polymerase
d)
all of these
58.
Direction that DNA is replicated
a)
3' to 5'
b)
5' to 3'
59.
Direction that DNA is READ?
a)
3' to 5'
b)
5' to 3'
60.
What strand is copied faster?
a)
Leading
b)
Lagging
61.
Structure C is
a)
helicase
b)
primase
c)
DNA polymerase III
d)
gyrase
62.
H is the
a)
leading strand
b)
lagging strand
c)
parent strand
d)
none of these
63.
Replication is occurring AWAY FROM the replication fork on strand
a)
I, the leading strand
b)
I, the lagging strand
c)
H, the leading strand
d)
H, the lagging strand
64.
This structure is an Okazaki fragment.
a)
A
b)
D
c)
F
d)
G
65.
Which of the following statements is true?
a)
DNA is single-stranded
b)
RNA is single-stranded
c)
DNA contains uracil
d)
RNA contains deoxyribose
66.
Which type of RNA takes the instructions from the nucleus to the cytoplasm?
a)
mRNA
b)
tRNA
c)
rRNA
d)
RNA polymerase
67.
What is the template for mRNA?
a)
DNA
b)
tRNA
c)
rRNA
d)
proteins
68.
What is the product of translation?
a)
DNA
b)
mRNA
c)
tRNA
d)
proteins
69.
What is the product of transcription?
a)
DNA
b)
mRNA
c)
tRNA
d)
proteins
70.
What is the central dogma of molecular biology?
a)
RNA-protein-DNA
b)
RNA-DNA-protein
c)
DNA-protein-RNA
d)
DNA-RNA-prtein
71.
How did Rosalind Franklin's photo 51 affect th work of Watson and Crick?
a)
It was used to determine the physical structure of DNA
b)
It was used to identify the four bases that make up DNA
c)
It was used to determine the theory of independent assortment
d)
It was used to show DNA was the molecule of inheritance
72.
Franklin used x-ray crystallography to determine the shape of the DNA molecule is
a)
a cloverleaf
b)
a braided rope
c)
a pleated sheet
d)
a twisted ladder
73.
Which scientist(s) determined that viruses contain DNA?
a)
Avery & McLeod
b)
Watson & Crick
c)
Griffith & Franklin
d)
Hershey & Chase
74.
What process did Griffith discover using mice and altered forms of the pneumonia bacteria?
a)
transcription
b)
mutation
c)
transformation
d)
translation
75.
In the lac operon model the genes within the operon will be expressed if:
a)
lactose is absent in the cell
b)
glucose is present in the cell
c)
lactose is present in the cell
76.
A protein that binds to the operator and blocks the RNA polymerase
a)
regulator
b)
repressor
c)
activator
d)
corepressor
77.
what does a promoter do?
a)
it allows a gene to be transcribed
b)
it creates a DNA segment
c)
it is another word for ribosomes
d)
it is another word for RNA
78.
What does the lactose do to the Operon?
a)
Blocks transcription because of the energy it provides
b)
Allows the repressor to be unbind from the Operator.
c)
The lactose binds the lactose and stops transcription
d)
Allows for the transcription to speed
79.
Which of the following statements regarding mRNA is correct?
a)
Exons are included in the protein sequence, while introns are left out
b)
Introns are included in the protein sequence, while exons are left out
c)
Exons and Introns can both be included or left out depending on the protein
d)
Exons and Introns are both part of the mRNA sequence, but only exons are part of the rRNA and tRNA
80.
How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different?
a)
The two different cells become mutated
b)
The proteins expressed in each cell are different
c)
They actually have different DNA in the two types of cells.
d)
The genome of the different cells changes
81.
What is the role of operons in prokaryote gene expression?
a)
It makes the genes prokaryotes be turned on
b)
It accounts for the regulation of gene activity in response to the needs of the cells
c)
To make DNA for the gene
d)
To make the gene turn of and off
82.
What structure of this molecule binds with the mRNA molecule?
a)
Amino Acid
b)
tRNA
c)
Anticodon
d)
Codon
83.
The "on/off" switch for an operon is called the
a)
promoter
b)
enhancer
c)
operator
d)
gene
84.
The tryptophan operon is
a)
permanently turned on.
b)
turned on when tryptophan is present in the growth medium.
c)
turned off only when glucose is present in the growth medium.
d)
turned off when tryptophan is added to the growth medium.
85.
The purpose of the lac operon is to produce enzymes that
a)
synthesize lactose
b)
use lactose
c)
synthesize tryptophan
d)
use tryptophan
86.
This technology has the potential to silence genes that could produce genetic disorders such as Huntington's.
a)
RNAi
b)
Cloning
c)
Selective Breeding
d)
Transgenesis
87.
What is a Hox gene?
a)
a class of regulatory genes that determine the identity of body parts and regions in an animal embryo.
b)
found in many homeotic genes that regulate development
c)
a group of homeotic genes clustered together that determine the head to tail identity of body parts in animals.
88.
Transcription is the process where
a)
DNA is replicated
b)
DNA is copied into mRNA
c)
DNA is copied in tRNA
d)
DNA is copied
89.
Translation is the process where
a)
mRNA is created in the Nucleus
b)
mRNA is decoded to form a protein
c)
glucose molecules are made
d)
is where lipids are synthesised
90.
The anti-codon
a)
contains a sequence the same as the codon
b)
contains a sequence complementary to the codon
c)
contains the base thymine
91.
tRNA is involved in
a)
carrying amino acids
b)
carrying ribosomes
c)
carrying glucose
d)
carrying lipids
92.
Amino acids are joined together in order to form
a)
DNA
b)
ribosomes
c)
proteins
d)
RNA
93.
Which RNA bases would pair with TACGAA in transcription?
a)
AUGCUU
b)
ATGCTT
c)
GCATCC
d)
GCAUCC
94.
Where does transcription take place?
a)
nucleus
b)
cytoplasm
c)
ribosome
95.
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
96.
Translation is a process in eurkaryotic cells takes place in the:
a)
Cytoplasm
b)
Nucleus
c)
Nucleolus
d)
Golgi Bodies
97.
What is the correct amino acid sequence for the mRNA code AUGCCAGUAUGA
a)
Met-Pro-Ala-Val
b)
Met-Pro-Val
c)
Tyr-Gly-His
d)
Tyr-Gly-Arg-His
98.
What amino acid is represented by the codon UUA?
a)
Phenylalanine
b)
Tyrosine
c)
Leucine
d)
Stop codon
99.
What is the correct amino acid sequence for the mRNA code AUGCCAGUAUGA
a)
Met-Pro-Ala-Val
b)
Met-Pro-Val
c)
Tyr-Gly-His
d)
Tyr-Gly-Arg-His
100.
The codon CCU codes for what amino acid?
a)
Isoleucine
b)
Stop
c)
Methionine
d)
Proline
101.
Which amino acid pairs with the codon AGA
a)
Thr
b)
Arg
c)
Ala
d)
Glu
102.
Which amino acid pairs with the codon CAU
a)
Ala
b)
His
c)
Ser
d)
Thr
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