WorksheetsDNA, Proteins, Mutations
Total questions: 27
Worksheet time: 1hrs 26mins
In DNA molecules, which nitrogenous base is complementary to Cytosine?
Uracil
Guanine
Adenine
Thymine
This is the primary enzyme responsible for DNA replication; it "reads" DNA strands and attaches complementary bases in the correct sequence.
DNA Polymerase III
DNA Polymerase I
DNA Helicase
DNA Ligase
Which biomolecule is primarily responsible for the storage of the genetic information necessary for an organism to perform all of its functions?
mRNA
Proteins
rRNA
DNA
DNA replication produces two new DNA molecules, each of which contains one old strand and one newly-synthesized strand. For this reason, we say that DNA replication is:
Conservative
Semi-conservative
Destructive
Creative
These molecules are the "building blocks" of DNA and RNA:
Nucleotides
Amino Acids
Nucleic Acids
Proteins
This enzyme is responsible for unwinding/"unzipping" the DNA double helix during the first step of DNA replication:
DNA Ligase
DNA Zipperase
DNA Polymerase III
DNA Helicase
The three components of a nucleotide are a pentose sugar (either deoxyribose or ribose), a phosphate group, and a_____________________
Nitrogenous base
Genetic base
Hydrogenous base
Random chemical
The overall structure of a DNA molecule can be described as a:
Helix
Double Helix
Ribbon
Single strand
The small segments of DNA that DNA Polymerase III creates on the lagging strand during replication are called:
Nucletotides
RNA primers
Okazaki fragments
Polypeptides
This is the enzyme that finishes the process of DNA replication by connecting the many Okazaki fragments of the lagging strand:
DNA Polymerase III
DNA Polymerase I
DNA Ligase
Primase
During the finishing stage of DNA replication, this enzyme is responsible for replacing the RNA primers with DNA nucleotides.
Primase
DNA Polymerase III
DNA Polymerase I
DNA Ligase
Please select the correct complement for this DNA sequence: AAT CAT GTA CGC GGG
AAT CAT GTA CGC GGG
TTA GTA CAT GCG CCC
GGG CGC ATG TAC TAA
TAA TAC ATG CGC GGG
This is the type of bond that holds together the complementary bases of the two strands of the DNA double helix :
Covalent bond
Ionic bond
Hydrogen bond
Chemical bond
True or False: The full names of the DNA nucleotides are Adenine, Cytosine, Thymine, and Guanine
True
False
The end of a DNA strand that has a phosphate group is called the:
5' end
3' end
The end of a DNA strand that has a deoxyribose sugar is called the:
5' end
3' end
Which of these is a correct description of the steps and enzymes involved in DNA replication?
Unwinding by DNA Helicase, placement of RNA primers by Primase, synthesis of new strands by DNA Polymerase III, finishing stage by DNA Polymerase I and DNA Ligase.
Unwinding by DNA Polymerase I, placement of RNA primers by DNA Ligase, synthesis of new strands by DNA Polymerase III, finishing stage by DNA Helicase and DNA Ligase.
Unwinding by DNA Helicase, placement of RNA primers by DNA Polymerase I, synthesis of new strands by DNA Ligase, finishing stage by DNA Polymerase III and Primase.
The nitrogenous base that is only found in RNA and that replaces Thymine is called:
Adenine
Cytosine
Thymosine
Uracil
This is the type of RNA that carries the genetic instructions encoded by DNA out of the nucleus to a ribosome where it can be converted into a protein:
tRNA
rRNA
mRNA
siRNA
This is the second stage of protein synthesis; in this stage, a ribosome reads mRNA codons and assists in assembling a chain of amino acids that will become a protein:
Transcription
Translation
Replication
Proteination
This is a specific sequence within an organism's DNA that encodes a specific protein; it is the basic unit of genetic information.
Gene
Exon
Codon
Transcript
This type of RNA molecule carries amino acids to the ribosome during translation; when its anticodon binds to a matching codon, the amino acid it carries is added to the growing protein.
mRNA
tRNA
rRNA
siRNA
This type of molecule is the basic building block of proteins. Each different type of this molecule has a unique functional group called an R-group or a side chain.
Amino acid
Nucleotide
Uracil
Monomer
This is the first stage of protein synthesis; it occurs in the nucleus, and involves the transfer of genetic information from DNA to RNA:
Transcription
Translation
Genetic Transfer
Proteination
These are the 3-nucleotide units within mRNA transcripts that each code for a specific amino acid.
Codons
Anticodons
Genes
Amino units
Using the genetic code table (you may need to open your notes to find a bigger version if it does not load right in this quiz), translate this mRNA codon sequence into an amino acid sequence
AUG GCG UUU AAG UGA
Met - Ala - Phe - Lys - STOP
Met - Gly - Lys - Ser - STOP
Lys - Phe - Arg - Met - STOP
STOP - Leu - Ile - Thr - Met
Unmutated sequence: CGC AAA TTC AGG
Mutated sequence: CGC TAA ATT CAG G
What type of mutation has occurred here?
1 base insertion, frameshift
1 base deletion, frameshift
1 base substitution, synonymous
1 base substitution, nonsynonymous
