Question 1
Assume that two strands of DNA have been separated and that the base sequence on one strand is AGCC. What is the sequence of bases on the complimentary strand of DNA?
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a
TCGG
b
AGCC
c
GCTT
d
TACA
Question 2
A timeline of important discoveries about DNA is shown below. These discoveries have contributed to our current knowledge about DNA.
Image
Which statement best summarizes the development of knowledge about DNA over time?
a
Ideas about DNA have remained unchanged over time.
b
Past knowledge about DNA was discarded as each new discovery was made.
c
Scientists gained more knowledge about DNA as new evidence became available.
d
Changes in ideas about DNA are based on opinion.
Question 3
Put the following processes of protein synthesis in the correct order.
Reorder answers
1.tRNA's anticodons bring amino acids to the corresponding mRNA codons
Reorder answers
2.amino acids bind to each other making a protein
Reorder answers
3.a stop codon is reached, the newly formed protein is released to go do its job for the cell
Reorder answers
4.mRNA copies DNA according to complimentary base pairing.
Reorder answers
5.mRNA leaves the nucleus
Reorder answers
6.DNA strands unwind and separate
Question 4
Which is a correct statement about the cell cycle?
a
Nothing happens during the G1 and G2 phases.
b
DNA replicates during cytokinesis of the M phase.
c
The M phase is usually the longest phase.
d
DNA replicates during the S phase of interphase.
Question 5
During translation, the type of amino acid that is added to the growing polypeptide depends on the
a
codon on the mRNA and the anticodon on the tRNA to which the amino acid is attached.
b
anticodon on the tRNA to which the amino acid is attached only.
c
anticodon on the mRNA only.
d
codon on the mRNA only.
Question 6
What is the function of helicase?
a
It forms the DNA helix.
b
It separates DNA strands.
c
It forms bonds between DNA nucleotides.
d
It adds new nucleotides to the DNA helix.
Question 7
Restriction enzymes cuts DNA at a specific sequence of nucleotides. Why would these biotechnology tools be useful in creating a genetically modified organism?
images_4_5e5033d777c7e.jpg
a
They cause massive mutations, leading to many changes in the host organism.
b
They directly add all needed chromosomes to the organism's genome.
c
They create promoter regions for accelerated transcription.
d
They allow the desired gene to be placed in a specific location.
Question 8
Eukaryotic DNA is packed in a chromatin structure, making it harder than prokaryotic DNA to be transcribed. Which proteins are directly involved in the structure of eukaryotic DNA?
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a
histones
b
polymerases
c
Actins
d
collagens
Question 9
The diagram shows three types of mutations.
Which correctly identifies each type of mutation in the diagram?
A.
Letter Type of Mutation
W deletion
X insertion
Y substitution
B.
Letter Type of Mutation
W insertion
X substitution
Y deletion
C.
Letter Type of Mutation
W substitution
X deletion
Y insertion
D.
Letter Type of Mutation
W insertion
X deletion
Y substitution
a
A
b
B
c
C
d
D
Question 10
What is the main goal of the central dogma?
a
To create RNAs to carry on body functions.
b
To create a catchy song to carry on body functions.
c
To create DNA to carry on body functions.
d
To create proteins to carry on body functions.
Question 1: c - GCTT
Question 2: c - Scientists gained more knowledge about DNA as new evidence became available.
Question 3: 6, 4, 5, 1, 2, 3 (6. DNA strands unwind and separate, 4. mRNA copies DNA according to complimentary base pairing, 5. mRNA leaves the nucleus, 1. tRNA's anticodons bring amino acids to the corresponding mRNA codons, 2. amino acids bind to each other making a protein, 3. a stop codon is reached, the newly formed protein is released to go do its job for the cell)
Question 4: d - DNA replicates during the S phase of interphase.
Question 5: a - codon on the mRNA and the anticodon on the tRNA to which the amino acid is attached.
Question 6: b - It separates DNA strands.
Question 7: d - They allow the desired gene to be placed in a specific location.
Question 8: a - histones
Question 9: C - Letter W: substitution, Letter X: deletion, Letter Y: insertion
Question 10: d - To create proteins to carry on body functions.