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WorksheetsA 5 DNA and Modern Genetics
Total questions: 40
Worksheet time: 21mins
Which molecule provides the blueprint for making proteins in an organism?
DNA
Amino Acids
Enzymes
Codons
If human DNA is composed of approximately 30% Thymine, how much Guanine is likely present?
10%
20%
30%
60%
If a strand of DNA is comprised of 17% adenine, how much thymine will be present?
17%
34%
42%
83%
If a strand of DNA is comprised of 28% thymine, how much cytosine will be present?
14%
22%
28%
36%
If Cytosine and Guanine make up a total of 36% of a strand of DNA, how much Adenine will be present?
18%
32%
36%
64%
The backbone of DNA is made up of
deoxyribose sugar, nitrogen bases, phosphate
nitrogen bases, phosphate
deoxyribose sugar, phosphate
deoxyribose sugar, nitrogen bases
The rungs of DNA are made up of
nitrogen bases, phosphate
deoxyribose sugar, phosphate
deoxyribose sugar, nitrogen bases
nitrogen bases
A nucleotide consists of
bases and a phosphate
base and a sugar
phosphate and a sugar
sugar, phosphate and a base
What nitrogen bases are in DNA?
adenine, thymine, guanine, cytosine
adenine, uracil, guanine, cytosine
adenine, thymine, uracil, cytosine
adenine, thymine, guanine, uracil
Which best describes the job of DNA?
Provides instructions for assembling protein molecules.
Provides instructions for assembling chromosomes into histones.
Helps with shuffling amino acids into proteins.
Helps with relocating mRNA into physical traits.
For what does the information in our genes provide the instructions?
assembling protein molecules
assembling chromosomes into DNA
rearranging RNA into proteins
rearranging DNA into physical traits
If a stand of DNA read 3’ -CGC|TTG|AAG|CGA-5’ what would be the code for the complementary strand?
6’-GCG|AAC|TTC|GCT-1’
5’-GCG|AAC|TTC|GCT-3’
5’-GCG|AAA|CTT|GCG|T-3’
5’-CGC|TTG|AAG|CGA-3’
In the diagram below, strands I and II represent the two complementary strands of a portion of a DNA double helix. The sequence of strand I is indicated below. What is the sequence of strand II? Strand I -----------C-T-A-C----------- Strand II -----------?-?-?-?-------------
AGCA
CTAC
TCGT
GATG
Within which structure of an animal cell does DNA replication take place?
Vacuole
Cell membrane
Nucleus
Ribosome
Molecules involved in replication (Select all that apply).
DNA
mRNA
tRNA
rRNA
What nitrogen bases are in RNA?
Adenine, thymine, guanine, and cytosine
Adenine, uracil, guanine, and cytosine
Adenine, thymine, uracil, and cytosine
Adenine, thymine, guanine, and uracil
Which statement best describes RNA?
RNA is usually double stranded and contains the base thymine
RNA is usually single stranded and contains the base uracil
RNA is longer than DNA and uses 5 bases to encode information
RNA is made in the nucleus and stays there to carry out its function
Which of the following is not a type of RNA?
tRNA
mRNA
rRNA
dRNA
The process by which the genetic code of DNA is copied into a strand of mRNA is called
Translation
Transformation
Transcription
Replication
Molecules involved in transcription (Select all that apply).
DNA
mRNA
tRNA
rRNA
Transcribe the DNA strand into mRNA. Section it into codons. Translate it into amino acids. TAC GGC CGA TGC ATT.
AUG CCG GCU ACG UAA → Met - Pro - Ala - Thr - STOP
AAC CCG CGA AGC AAA → Iso - Pro - Arg - Ser - Lys
UAC GGC GCA UGC AUU →Tyr - Gly - Ala - Cys - Iso
AUC CCG CGA UGC UUU → Iso - Pro - Arg - Cys - Phe
Molecules involved in translation (Select all that apply).
DNA
mRNA
tRNA
rRNA
Which of the following codons signifies the end of translation?
GAC
GGG
UGA
UGC
How many nucleotides are needed to code for one amino acid?
1
3
6
12
If a strand of mRNA is 492 nucleotides long, how many amino acids will be in the protein it creates?
164
246
984
1,476
If a protein is 386 amino acids long, how many nucleotides created it?
128
193
772
1,158
DNA Polymerase reads the original strand from the _ end of the DNA molecule towards the _ end.
3’ to 5’
5’ to 3’
During DNA replication, newly formed DNA is built starting at the _ end and moving towards the _ end.
3’ to 5’
5’ to 3’
The lagging strand of the newly synthesized DNA goes _ the replication fork.
away from
towards
The leading strand of the newly synthesized DNA goes _ the replication fork.
away from
towards
separate the hydrogen bonds between nitrogen bases to unzip DNA molecule
DNA helicase
DNA Polymerase
Okazaki
read the template strand of DNA and add new nucleotides accordingly
DNA helicase
DNA Polymerase
Okazaki
Lagging DNA is built using _ fragments
DNA helicase
DNA Polymerase
Okazaki
Mutations that only affect one single nucleotide.
Chromosomal Mutation
Frameshift mutation
Gene Mutation
Point Mutation
Silent Mutation
A gene mutation that results in no change in the amino acid sequence.
Chromosomal Mutation
Frameshift mutation
Gene Mutation
Point Mutation
Silent Mutation
Mutations that affect one gene.
Chromosomal Mutation
Frameshift mutation
Gene Mutation
Point Mutation
Silent Mutation
Mutations that affect multiple genes.
Chromosomal Mutation
Frameshift mutation
Gene Mutation
Point Mutation
Silent Mutation
A gene mutation that affects multiple nucleotides.
Chromosomal Mutation
Frameshift mutation
Gene Mutation
Point Mutation
Silent Mutation
Select the gene mutations.
Deletion - Insertion - Substitution
Duplication - Inversion - Translocation
Deletion - Duplication - Translocation
Duplication - Inversion - Substitution
Deletion - Insertion - Translocation
Select the chromosomal mutations
Deletion - Insertion - Substitution
Duplication - Inversion - Translocation
Deletion - Duplication - Translocation
Duplication - Inversion - Substitution
Deletion - Insertion - Translocation
